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MV1403
ADVANCE INFORMATION
DS3046-2.1
MV1403
PCM MACROCELL DEMONSTRATOR
The MV1403 contains 8 PCM macrocells which can be configured so as to perform the common channel signalling and error detection functions for a 2.048 Mbit 30 channel PCM transmission link, operating to the appropriate CCITT recommendations. The MV1403 also allows access to all the macrocells individually and is implemented in GPS CMOS technology utilising the CLA60000 series gate array, offering high performance, low power and fast turn-round. The following macrocells are included in the MV1403. Timeslot Zero Transmitter - TXTSZ Timeslot Sixteen Transmitter - TXTS16 Cyclic Redundancy Check Generator - CRCGEN High Density Bipolar (HDB) 3 Encoder - HDB3EC Timeslot Zero Receiver - RXTSZ Timeslot Sixteen Receiver - RXTS16 Cyclic Redundancy Checker - CRCCHK High Density Bipolar (HDB) 3 Decoder - HDB3DC With the MV1403 set up to combine the internal macrocells, two demonstration modes are available, referred to as Transmit and Receive demonstration modes. In Transmit demonstration mode, timeslot zero sync word (including user data bits and optional CRC check bits), timeslot sixteen data and 30 voice channels are combined and transmitted as pseudo-ternary HDB3 encoded outputs. The Transmit demonstration mode can also be set to generate CRC multiframe data in accordance with CCITT Recommendation G. 704. In Receive demonstration mode, the pseudo-ternary HDB3 inputs are decoded back to NRZ form and frame synchronisation is achieved by detection of the Frame Alignment signal in the incoming data stream. This permits extraction of user data bits, timeslot sixteen data and voice channel data. An optional CRC mode generates CRC multiframe alignment and a cyclic redundancy check is carried out on the incoming data. In addition receive demonstration mode generates appropriate alarms for loss of input, double violation on the HDB3 inputs, loss of frame or CRC multiframe alignment, detection of erroneous frame alignment word, remote alarm received from the transmitter, and detection of a CRC error in either submultiframe 1 or 2.
VDD1 ER MFQ1 MFQ2 DQ8 DQ7 DQ6 DQ5 DQ4 DQ3 DQ1 Q1S VDD2 GND1 LIA MFQ3 MFQ4 MFQ5 FRS13RZ MFD1 MFD2 MFD3 MFD4 VDD3
1 2 3 4 5 6 7 8 9 10
48 47 46 45 44 43 42 41 40
GND4 CCR CK8 TZSRZ TSZRZ MFQ9 FRS13 FRS15 MFQ8 MFQ7 MFQ6 RST GND3 MFD6 TZS FRS MFD5 CRC P STM CLK MODE DEMO GND2
MV 39 1403 11 DP 38
12 13 14 15 16 17 18 19 20 21 22 23 24 37 36 35 34 33 32 31 30 29 28 27 26 25
DP48
13 GND1
17 MFQ5
16 MFQ4
15 MFQ3
DQ1
10 DQ3
DQ4
DQ5 8
12 Q1S
14 LIA
11
9
FRS13RZ MFD1 MFD2 MFD3 MFD4 VDD DEMO MODE CLK STM P
18 19 20 21 22 23 24 25 26 27 28
PIN 1 IDENT
7
DQ6
6 5 4 3 2
DQ7 DQ8 MFQ2 MFQ1 ER GND2 CCR CK8 TZSRZ TSZRZ MFQ9
MV 1403 HP
1 44 43 42 41 40
29
30
31
32
33
34
35
36
37
38
39
HP44
CRC
MFD5
FRS
TZS
MFD6
MFQ6
MFQ7
MFQ8
FRS15
NOTE:
MFD is multi-function input, MFQ is multi-function output
Figure 1: Pin connections - top view
s Transmitted Frame Structure to CCITT Recommendation G. 704 s Receiver Frame Synchronisation to CCITT s Recommendation G. 732 s Selectable CRC Mode s CRC Generation and Checking to CCITT Recommendation G. 704
FEATURES
s s s s s Single + 5V Supply All Inputs and Outputs TTL Compatible Selectable as PCM Transmitter or Receiver Allows Access to all 8 Macrocells Individually HDB3 Encoding and Decoding to CCITT Recommendation G. 703
FRS13
RST
1
MV1403
FUNCTIONAL DESCRIPTION
The MV1403 PCM macrocell demonstrator contains a family of 4 Transmit PCM and 4 Receive PCM macrocells which may be configured to function individually, or be connected together to form demonstrations of their operation. In order to keep the pin count to a minimum, some of the input and output pins are shared. Pin functions thus depend upon whether the device is configured as a transmitter or receiver. The operational modes of the MV1403 are selected under control of the MODE and DEMO pins, as shown in Table 1. Note that the MODE pin selects either the transmit or receive set of macrocells and that the DEMO pins selects either individual or combined connections. In addition the operation of the MV1403 is controlled by a further two control inputs, STM and CRC. The STM pin is used for device testing and should be tied low for normal operation. The CRC control pin selects whether or not the deviceperforms the CRC generation/checking procedure. A logic High' on this pin puts the device in Cyclic Redundancy Generate/Check mode. More detailed information about all 8 macrocells can be found in the individual macrocell publications. INDIVIDUAL TRANSMIT MODE, TX1 In this mode (MODE = 0, DEMO = 0) the four transmitter macrocells (TXTSZ, TXTS16, CRCGEN and HDB3EC) are all accessed individually. The functional diagram of the MV1403 in this mode is shown in Fig. 2. All four macrocells are synchronised to a common 2.048MHz clock, and the TXTSZ, TXTS16 and CRCGEN macrocells are also synchronised to a second timing input, FRS (Frame Sync). This is an 8 clock period high going pulse at 8kHz which masks timeslot zero to enable frame alignment. The function of each transmit macrocell is now described separately. TIMESLOT ZERO TRANSMITTER The Timeslot Zero Transmitter macrocell generates a Frame Alignment Signal (FAS) in accordance with CCITT Recommendation G. 704. This is combined with the international spare bit (the D1 input) and output on Q during timeslot zero of alternate frames, denoted sync frames. During the other interleaved frames, denoted non-sync frames, bit 2 is fixed at logic 1 to avoid imitation of the FAS. This bit is slotted together with the international spare bit (D1 input) and 6 user data bits (the D3N-D8N inputs) for output on Q. A TZS output (Timeslot Zero Sync frame) is provided to denote whether a sync frame or non-sync frame is being output. It changes state one clock period after the end of timeslot zero and is high during timeslot zero of sync frames. Fig. 3 shows the timing diagram for this macrocell. TIMESLOT SIXTEEN TRANSMITTER This macrocell takes in a continuous 64kbit data stream (D input) and outputs it in 8 bit packets at a bit rate of 2.048 Mbit during timeslot 16 of successive frames on its Q output. The position of timeslot 16 is determined from the FRS timing input, which masks timeslot zero. The TS16 output is an 8 clock period high going pulse at 8kHz, similar to FRS, but high during the 8 bits of timeslot sixteen. Fig. 4 shows the timing diagram for this macrocell. CYCLIC REDUNDANCY CHECK GENERATOR This macrocell has two modes of operation, selected by its EN control input. When EN is `high', CRC generation mode is selected. However, both modes are concerned with producing the data bit to be inserted into the international spare bit of timeslot zero (CCITT G. 704 structure). In non-CRC mode, this data is selected to be either the D1S (sync frames) or DlN (non-sync frames) input depending upon whether a sync or non-sync frame is about to be transmined (determined by the TZS input). With CRC mode enabled, the macrocell generates CRC words and outputs this data during the international spare bit of sync frames. During non-sync frames, the 6 bit CRC Multiframe Alignment Signal is output along with the two user data inputs, DlS and D1N. This procedure is carried out in accordance with CCITT Recommendation G. 704. The CRC word is generated from the incoming data stream on the D input pin. CCITT Recommendation G. 704 defines the 16 frame CRC multiframe structure, not related to the possible use of a 16 frame multiframe structure in timeslot 16. Each 16 frame CRC multiframe is divided into two 8 frame submultiframes, denoted submultiframes 1 and 2 (SMF1 and SMF2). The CRC procedure is carried out on each submultiframe of data and the resulting 4 bit CRC word is output during the international spare bit of sync frames during the following sub-multiframe. All data is output on the Q output pin. Table 2 displays the CRC multiframe structure in more detail . HIGH DENSITY BIPOLAR (HDB3 )ENCODER The HDB3 Encoder macrocell converts the incoming NRZ data on its D input pin into HDB3 pseudo-ternary form for transmission over a 2.048 Mbit PCM link in accordance with CCITT Recommendation G.703. The two TXD outputs represent the HDB3 data in pseudo-ternary form. They are always low during the high half cycle of CLK, but may be high or low during the low half cycle. The Q output represents the D input but delayed by one period. Fig. 5 shows the timing diagram of this macrocell.
2
MV1403
FRS DQ1, DQ3-DQ8 D1, D3N-D8N Q MFQ2 MFQ1 MFD6 D Q MFQ9 MFQ8 TS16
FRS
TXTSZ
TZS STM DEMO MODE CLK CLK
TXTS16
MODE CONTROL
TXD1 CRC EN (CRC)
MFQ5 MFQ4
CRCGEN
D TZS D1S D1N MFD5
Q D
HDB3EC
Q MFQ3
TXD2
VDD GND
TZS MFD4 MFD2 MFQ6
MFD3
Figure 2: TX1 Individual Transmit mode functional diagram
Mode Name
MODE input
DEMO input
CRC input
STM input
Mode description
TX1 TX2 RX1 RX2 TX1/2 TX1/2 RX1/2 RX1/2 -
0 0 1 1 0 0 1 1 X
0 1 0 1 0/1 0/1 0/1 0/1 X
0/1 0/1 0/1 0/1 0 1 0 1 X
0 0 0 0 0 0 0 0 1
MV 1403 is configured as individual Transmit PCM macrocells MV1403 is configured as a PCM Transmitter demonstration, using the Transmit macrocells MV1403 is configured as individual Receive PCM macrocells MV1403 is configured as a PCM Receiver demonstration, using the Receive macrocells CRC generation mode of the CRCGEN macrocell is disabled CRC generation mode of the CRCGEN macrocell is enabled CRC mode of the RXTSZ macrocell is disabled CRC mode of the RXTSZ macrocell is enabled MV1403 is configured in device test mode. This mode should not be used for normal operation
Table 1: Operational modes of the MV1403
CRC Multiframe Sub-Multiframe 1 (SMF1) Frame number Bit one of timeslot zero 0 1 2 C2 3 0 4 C3 5 1 6 C4 7 0 8 C1 Sub-Multiframe 2 (SMF2) 9 1 10 C2 11 1 12 C3 13 D1S 14 C4 15 D1N
C1 0
NOTES: 1. C1, C2, C3, C4 are the bits of the CRC word. 2. 001011 is the CRC Multiframe Alignment Signal (MAS). 3. Even numbered frames are denoted Sync frames; odd numbered frames are denoted non-sync frames.
Table 2: Structure of the CCITT CRC Multiframe
3
MV1403
CLK FRS TZS D1 Q d1 d1 0 0 1 1 0 1 1
Macrocell transmitting timeslot zero sync. word
CLK FRS TZS D1 D3N-8N Q d1 d3-d8 d1 1 d3 d4 d5 d6 d7 d8
Macrocell transmitting timeslot zero non-sync. word
Figure 3: Timeslot zero transmitter timing
CLK 1 FRS 32 64 96 128
D
D5
D6
D7
D8
D1
TS16 Q N.B. The D input is sampled on counts 24, 56, 88 etc. D1 D2 D3 D4 D5 D6 D7 D8
Figure 4: Timeslot sixteen transmitter timing
CLK
D
Q
TXD2
B
B V
B
V
TXD1
B
B
NOTES: 1. B is a mark, V is an HDB3 violation. 2. There is a 3 clock period delay from input (D) to output (TXD1/2) 3. This diagram assumes the last preceding violation occurred on TXD1.
4
Figure 5: HDB3 encoder timing
MV1403
TRANSMIT DEMONSTRATION MODE, TX2
Transmit demonstration mode (MODE =0, DEMO= I) uses the four transmitter macrocells connected together internally, to demonstrate how they may be utilised to perform the common channel signalling and error detection functions of a 2.048 Mbit 30 channel PCM transmitter. The functional diagram of the MV1403 in this mode is now as shown in Fig. 6. Again all four macrocells are synchronised to a common 2.048MHz clock with frame synchronisation achieved from the FRS input. The Timeslot Zero transmitter alternately outputs sync words and non-sync words, during timeslot zero, denoting which by its TZS output. The user data bits of the nonsync word (D3N-D8N) are available as parallel data inputs. The Timeslot Zero data is used as one of the inputs to the transmission multiplexer. The Timeslot Sixteen transmitter takes in the continuous 64kbit data stream from its D input and outputs this in 8 bit bursts during timeslot 16. This data along with the TS16 frame marker are also used as inputs to the transmission multiplexer, TMUX. The transmission multiplexer forms a single PCM data stream at its Q output by multiplexing the timeslot zero and timeslot 16 data with the remaining 30 channels (timeslots 115 and 17-31) of voice data. This is controlled by the two frame marker inputs to the multiplexer, FRS and TS16. The output from TMUX is input to the Cyclic Redundancy Check Generator and HDB3 Encoder macrocells. When in CRC mode (EN=1), the CRC Generator macrocell performs its CRC procedure on this incoming data stream. In non-CRC mode, this macrocell uses its two data inputs, D1S and D1N, along with the timing input, TZS, to determine its output. However, in CRC mode the output consists ol the CRC word data bits interleaved with the CRC multiframe alignment word and the two user data bits, D1S and D1N, as previously displayed in Table 2. In either case, the output data is input directly to the international spare bit input of the Timeslot Zero Transmitter. The TZS input of the CRC generator is connected directly to the TZS output of the Timeslot Zero Transmitter. The output data from the transmission multiplexer is also input to the HDB3 Encoder macrocell. This macrocell converts the incoming NRZ data into pseudo-ternary HDB3 transmission code, ensuring adequate clock recovery at the receiver. This data is output on the TXD1 and TXD2 output pins. The Q output of the HDB3 Encoder macrocell is a single period delayed version of its D input and as such allows the output from the transmission multiplexer to be observed. Fig. 6 shows that all of the intemal connections except the output from TMUX, are also available as outputs from the MV1403, allowing the interaction of the rnacrocells to be observed.
FRS
DQ3-DQ8 D3N-D8N
MFQ1 MFQ2 MFD6 D Q
MFQ8 MFQ9 MFD1 PCM DATA Q
FRS
TXTSZ
TZS VDD
TXTS16
TS16
STM DEMO MODE CLK
STM DEMO MODE CLK TZS Q TXD1 EN (CRC) MFQ5 MFQ4
MODE CONTROL
CLK
TMUX
Q
CRC
CRCGEN
D D
HDB3EC
Q
TXD2
VDD GND D1S MFQ6 MFD4 D1N MFD2
MFQ3
Figure 6: TX2 Transmit demonstration mode functional diagram
5
MV1403
INDIVIDUAL RECEIVE MODE, RX1 In this mode (MODE = 1, DEMO = 0) the MV1403 allows access to the four receiver macrocells (HDB3DC, RXTSZ, RXTS16 and CRCCHK) individually. The functional diagram for the MV1403 in RX1 mode is shown in Fig. 7. The only common connection between the macrocells is the 2.048MHz clock used to synchronise the four macrocells. The function of each individual macrocell is now described separately. High Density Bipolar (HDB3) Decoder The HDB3 decoder macrocell decodes the HDB3 pseudoternary input data on its inputs, RXD1 and RXD2, into NRZ form to be output on a This process is carried out in accordance with CCITT Recommendation G. 703. In addition the macrocell provides two alarm outputs, DV and LIA and a clock recovery output, CDR. The first of these, DV, is used to signal that a double polarity violation has occurred on one of the pseudo-ternary inputs, whilst the second, LIA (Loss of Input Alarm), signals that eleven consecutive zeros have been received on the inputs. The CDR output is provided to assist regeneration of the 2.048MHz clock. This output is essentially just a logical `OR' function of the two RXD inputs. Since either a regenerated clock from the input data or a clock local to the PCM receiver may be used to synchronise the receiver, the two input signals cannot be guaranteed to straddle a rising clock edge and as such the two inputs were made asynchronous by the use of set-reset type latches before the first synchronous storage elements on the inputs. However, to ensure correct operation of the macrocell the rising edge of either of the RXD inputs should not occur within 50ns of the rising edge of CLK. The timing diagram for this macrocell is shown in Fig. 8. Timeslot Zero Receiver This macrocell is principally responsible for searching for and locking on to the Frame Alignment Signal (FAS) present in timeslot zero of the incoming data stream on the D input. This process is carried out in accordance with the loss and recovery of frame alignment strategy described in CCITT Recommendation G.732. When frame alignment has been achieved this macrocell outputs various timing reference signals for use by the other macrocells and external circuitry. The most important reference signal is the TSZ (Timeslot Zero) output, which is equivalent to the FRS input signal required by the transmitter macrocells. It is an 8 clock period long active high pulse masking Timeslot Zero, allowing the other macrocells to achieve frame alignment. This output will free run when frame alignment is lost. The second timing output is TZS (Timeslot Zero Sync. frame). This 4kHz signal changes state once per frame, one period after the end of Timeslot Zero to identify sync and non sync frames. The TZS output is high during Timeslot Zero of sync frames. Two timing outputs, CCR (Channel Reset) and CK8, are not used by the other macrocells but may be used by external circuitry. CCR is a low going pulse, one period wide, occurring immediately after each timeslot zero sync frame. CK8 is an 8kHz signal going low at the end of bit 7 in each timeslot zero and high at the end of bit 7 in each timeslot sixteen. The TZS, CK8 and CCR outputs also free run when frame alignment is lost. Two alarm outputs are provided to signal errors in the incoming data stream. The first of these, is an error alarm, ER, which goes high for one frame following the frame in which a Timeslot Zero sync word, containing a corrupted alignment pattern, has been received. This alarm is only active whilst the receiver is in sync. Note that three consecutive errors of this type will put the receiver out of sync. Thus the second alarm output, SA (Sync. Alarm), goes high when the receiver is out of sync. In additon to the frame synchronisation process, the Timeslot Zero Receiver is also responsible for extracting the user data bits of non-sync words and the two international spare bits. The former of these are accessed via the parallel outputs Q3N-Q8N. The third bit of non-sync words (Q3N) is used as the remote alarm bit from the transmitter and a third alarm output RAI (Remote Alarm Indication), is derived from this bit. This alarm is a persistence checked version of Q3N and when the receiver is in sync, this alarm goes high when two consecutive (Q3N bits have been received as high. In order to extract the international spare bits of Timeslot Zero, the macrocell must be in sync with CRC mode correctly enabled or disabled. This is done using the M input with a logic `high' on this pin putting the macrocell in CRC mode.
MFD4 MFD3
MFQ3 DV
LIA LIA
MFQ4 MFQ5 MFD1 FRZ13RZ MFD2 CDR Q D
Q1S, DQ1, DQ3-DQ8 Q1S, DQ1, DQ3-DQ8 RAI ER
MFQ2 ER MFQ1 TSZRZ TZSRZ CK8 CCR RST CRC
RXD1 RXD2 VDD
HDB3DC
SA
RXTSZ
FRS13
TSZ TZS CK8
STM DEMO MODE CLK
STM DEMO MODE CLK
FRS15
CCR RST M (CRC)
MODE CONTROL
TZS MFDS VDD GND FRS13
TZS D FRS
CRCCHK
FRS 15 MSA ER1 ER2
RXTS16
Q
MFQ9
D MFQ7 MFQ6 MFQ8 FRS MFD6
FRS15
FRS13
6
Figure 7: RX1 individual receive mode functional diagram
MV1403
CLK 1 RXD1 B B V B B B 2 3 4 5 6 11 12 B
RXD2
B
B
B
V
B
V
V
B
Q
CDR
LIA
DV
NOTES: 1. B is a mark, V is a HDB3 violation. 2. There is a 5 period delay from input (RXD1/RXD2) to output (Q). 3. This diagram assumes that the rising edges of the RXD inputs occur at least 50ns before the rising edge of CLK.
Figure 8: HDB3 decoder timing - macrocell decoding HDB3 data and detecting errors
When in non CRC mode the international spare bit outputs, Q1S and Q1N, represent data extracted from the bit position of all sync frames and non-sync. frames respectively. If CRC mode is enabled, these outputs now represent data extracted from the bit 1 position of frames 13 and 15 respectively of the CRC multiframe structure. In order to accomplish this, two timing inputs, FRS13 and FRS15, are required. These inputs are required to be high during bit 8 of the appropriate frame, low during bit 8 of any other non-sync frame and any state elsewhere. A final input to this macrocell, RST, may be used to reset the synchronisation process, putting the macrocell out of sync. Timing diagrams for the Timeslot Zero P(eceiver macrocell are shown in Fig. 10. Timeslot Sixteen Receiver The Timeslot Sixteen Receiver macrocell extracts the 8 bits of common channel signalling data present in Timeslot 16 of successive frames of PCM data input on D. This 2.048Mbit input data burst is stored and output as a continuous 64kbit data stream. A single timing input, FRS, also common to the CRCCHK macrocell, is required, this input being an 8 bit pulse masking Timeslot Zero. Fig. 9 shows the timing of this macrocell. Cyclic Redundancy Checker The Cyclic Redundancy Checker macrocell (CRCCHK) performs a cyclic redundancy check procedure on the received data in accordance with CCITT Recommendation G.704,
this procedure being performed on the data input on its D input pin. The macrocell also extracts the first bit of each Timeslot Zero (the first bit of each frame) and searches for the CRC Multiframe Alignment Signal (MAS) in the bits from non-sync frames. When the MAS has been found the macrocell synchronises to it. This process requires two timing inputs, FRS and TZS. The FRS input must be high only during timeslot zero and TZS must be high during timeslot zero of sync frames. The macrocell generates CRC words from the input data and extracts the CRC bits being received in the first bit of sync frames. Each generated CRC word is compared with the CRC word received in the next sub-multiframe. Associated with this process are three alarm outputs, MSA, ER1 and ER2. The MSA (Multiframe Sync Alarm) output indicates whether multiframe synchronisation has occured. It is high whilst the macrocell is out of sync, and goes low after the beginning of frame 11 in which a correct alignment pattern has been received. The two error outputs, ER1 and ER2 indicate that CRC errors were detected in submultiframes 1 and 2 respectively. These two outputs can only change state on the first rising clock edge after the first bit of frames 0 and 8 respectively. When in CRC multiframe alignment, the macrocell also produces two timing outputs, FRS13 and FRS15, to reference the positions of frames 13 and 15. These signals may be used to allow the Timeslot Zero Receiver macrocell to extract the international spare bits of these frames.
7
MV1403
62.5s
7.8125s
15.625s
CLK
1 128 144 176 208 240
FRS
D
D1
D2
D3
D4
D5
D6
D7
D8
Q
D1
D2
D3
D4
Figure 9: Timeslot sixteen receiver timing
RECEIVE DEMONSTRATION MODE, RX2
In the last mode (MODE = 1, DEMO = 1) the four receiver macrocells are connected together internally to demonstrate how they may be utilised to perform the required functions of a 2.048 MBit PCM receiver. The functional diagram of the MV1403 will now be as shown in Fig. 11. The received pseudo-ternary HDB3 data is input to the HDB3 Decoder macrocell, which decodes this data and outputs it to the other three macrocells and external circuitry, as well as raising appropriate alarms as previously described for the individual receive mode. The Timeslot Zero Receiver then synchronises itself to the Frame Alignment Signal present in this data stream and produces various timing outputs tor use by the remaining two receiver macrocells and external circuitry. In addition this macrocell also raises appropriate alarms as required. The data being output by the HDB3 decoder is used as the D input to the Timeslot 16 Receiver macrocell which also uses the Timeslot Zero Receiver's TSZ output as its FRS timing input. From this the macrocell determines the position of timeslot 16 and extracts the 8 bits of signalling data from this timeslot. This data is then converted into a continuous 64kbit output data stream. The Cyclic Redundancy Checker macrocell uses the HDB3 Decoder's output data and the Timeslot Zero Receivers timing outputs TSZ and TZS as its D, FRS and TZS inputs respectively. From this information the macrocell synchronises itself to the CRC multiframe alignment signal and performs its CRC check procedure on the incoming data. Its two timing outputs, FRS13 and FRS15, are input to the Timeslot Zero Receiver to allow it to extract the international spare bits of the CRC multiframe. In non CRC mode, the Cyclic Redundancy Checker's error outputs are disabled by the alarm gating circuitry. When in CRC mode, this circuitry will also disable the ER1 and ER2 alarms whilst the macrocell is out of multiframe alignment. In addition to the required outputs, all the internal timing signals are also available as outputs from the MV1403, allowing the interaction of the macrocells to be observed.
MFD4 MFD3
MFQ3 DV
LIA LIA
MFQ4 CDR
TZSRZ RST
CRC M (CRC) RST TZS
Q1S, DQ1, DQ3-DQ8 Q1S, DQ1, DQ3-DQ8 RAI ER ER MFQ2
RXD1 VDD RXD2 STM MODE DEMO CLK STM MODE DEMO CLK MSA ER1 ER2
HDB3DC
Q
RXTSZ
SA CK8 CCR
MFQ1 CK8 CCR MFQ5
FRS13 FRS15
MODE CONTROL
CLK
D TSZ PCM OUT
MFQ8 MFQ7 MFQ6
MSA
ALARM GATING
ER1 ER2
FRS
CRCCHK
TSZ TSZRZ
FRS13 TZS MFDS VDD GND FRS13 FRS15 FRS15 D FRS
RXTS16
Q MFQ9
Figure 11: RX2 receive demonstration mode functional diagram
8
MV1403
125s 125s
CLK
D
d1s
0
0
1
1
0
1
1
d1n 1 d3n d4n d5n d6n d7n d8n
d1s
0
0
1
1
0
1
1
TSZ
TZS
CK8
CCR
Q1S Q1N Q3N-Q8N
d1n, d3n, - d8n
d1s
Macrocell first coming into sync., generating timing signals (non-CRC mode)
125s SYNC NON-SYNC FR13 SYNC FR14 NON-SYNC FR15 SYNC FR0
TSZ
TZS
FRS13
FRS15 D
d1s d1n
Q1S
d1s
Q1N Macrocell extracting Signalling Data (CRC mode)
125s SYNC WORD NON SYNC WORD SYNC WORD NON SYNC WORD Bit3 = 1 BAD SYNC WORD NON SYNC WORD Bit3 = 1 BAD SYNC WORD
d1n
NON SYNC WORD Bit3 = 1
BAD SYNC WORD
TSZ
TZS-RZ TZS SA
ER RAI Macrocell synchronisation process
Figure 10: Timeslot zero receiver timing
9
MV1403
PIN DESCRIPTIONS
Symbol Pin No. DP48 VDD1 ER 2 2 HP44 Mode name (see note 1) GLOBAL RX Pin name and description
Digital supply voltage. 5V (Note 2) Timeslot Zero Receiver (RXTSZ) Macrocell - Sync Word Error Output (ER). This flag goes high for one frame immediately after detection of a bad timeslot zero sync word, whilst the macrocell is in sync. Three consecutive errors of this type will put the receiver out of sync. The last ER pulse of this sequence will be longer than 256 periods if a valid sync word is detected during the pulse. Timeslot Zero Receiver (RXTSZ) Macrocell - Synchronisation Alarm Output (SA). This error flag goes high when the macrocell is out of sync and only changes state at the end of a sync frame timeslot zero. Timeslot Zero Transmitter (TXTSZ) Macrocell - Timeslot Zero Sync frame marker (TZS). This output is high during timeslot zero of sync frames and changes state at the beginning of timeslot one, bit 2 of every frame. Timeslot Zero Receiver (RXTSZ) Macrocell - Remote Alarm Indication Output (RAI) This is a persistence checked version of the Q3N output. When RXTSZ is in sync, this output goes high if the current and previous timeslot zero bit 3 of non-sync frames are both high. This output changes state at bit 1, timeslot 1 of non-sync frames. When the macrocell is out of sync this output is forced low in the non-sync frame following the last bad sync frame, and is held low until the macrocell comes back into sync. Timeslot Zero Transmitter (TXTSZ) Macrocell - Data Output (Q). The sync word and signalling data word appear here in 8 bit bursts during timeslot zero. Bit 1 appears immediately after the rising edges of CLK and FRS. This output is low during all timeslots except timeslot zero. Timeslot Zero Receiver (RXTSZ) Macrocell - Data Outputs (Q8N-Q3N). These outputs are extracted from bits 8-3 of timeslot zero during non-sync frames respectively. These outputs change at the start of bit 1, timeslot 1 of non-sync frames .
MFQ1
3
3
RX
TX
MFQ2
4
4
RX
TX
DQ8 DQ7 DQ6 DQ5 DQ4 DQ3
5 6 7 8 9 10
5 6 7 8 9 10
RX
TX
Timeslot Zero Transmitter (TXTSZ) Macrocell Data Inputs (D8N-D3N). These data inputs are inserted into bits 8-3 of timeslot zero during non-sync frames respectively. This data must be set up prior to the rising edge of FRS. Timeslot Zero Receiver (RXTSZ) Macrocell - Data Output (Q1 N). With CRC = 0, this output latches data from bit I, timeslot zero of non-sync frames. The output changes at the beginning of bit l, timeslot 1 of non-sync frames. With CRC=1, this output latches data from bit 1 of frame 15 of the CRC multiframe. Timeslot Zero Transmitter (TXTSZ) Macrocell - Data Input (D1). The data on this pin is inserted into the International spare bit (bit 1, timeslot zero of both sync and non-sync frames), and must be set up prior to the rising edge of FRS. This pin is unused since the Dl input of the Timeslot Zero Transmitter is connected internally to the Q output of the CRC Generator. Timeslot Zero Receiver (RXTSZ) Macrocell - Data Output (Q1S). With CRC = 0, this output latches data from bit 1, timeslot zero of sync frames. The output changes at the beginning of bit 1, timeslot 1 of sync frames. With CRC = 1, this output latches data from bit 1 of frame 13 of the CRC multiframe. Digital supply voltage. 5V (Note 2) Digital ground. 0V (Note 2) HDB3 Decoder (HDB3DC) Macrocell - Loss of Input Alarm Output (LIA). This alarm output goes high after 11 consecutive zeros have been detected on the HDB3 inputs. It is reset on detection of a mark (1) on either HDB3 input.
DQ1
11
11
RX
TX1 . TX2 Q1S 12 12 RX
VDD2 GND1 LIA
13 14 15
13 14
GLOBAL GLOBAL RX
10
MV1403
PIN DESCRIPTIONS (continued)
Symbol Pin No. DP48 MFQ3 16 HP44 15 Mode name (see note 1) RX Pin name and description
HDB3 Decoder (HDB3DC) Macrocell - Double Violation Alarm Output (DV). This pin goes high one period after detection of a double violation on either of the HDB3 inputs. HDB3 Encoder (HDB3EC) Macrocell - Data Output (a). This output is a single period delayed version of this macrocells D input. HDB3 Decoder (HDB3DC) Macrocell - Clock Regeneration Output (CDR). This output is a logical `OR' function of the two HDB3 inputs and may be used by external clock regeneration circuitry. This signal has a variable mark-to space ratio. HDB3 Encoder (HDB3EC) Macrocell - HDB3 Encoded Output 2 (TXD2). This output is always low during the high half cycle of clock and is only high the low half cycle if a mark is to be output. HDB3 Decoder (HDB3DC) Macrocell - HDB3 Decoded Output (Q). This output is the HDB3 inputs decoded back to NRZ form. HDB3 Encoder (HDB3EC) Macrocell - HDB3 Encoded Output 1 (TXD1). As TXD2 (MFQ4). Timeslot Zero Receiver (RXTSZ) Macrocell - Frame 13 Marker Input (FRS13). In CRC mode, this input should be high during bit 8, Frame 13 of the CRC multiframe and low during bit 8 of all other non-sync frames. This pin is unused since the FRS13 input ol the Timeslot Zero Receiver is connected internally to the FRS13 output of the CRC Checker. Timeslot Zero Receiver (RXTSZ) Macrocell - Frame 15 Marker input (FRS15). In CRC mode, this input should be high during bit 8, Frame 15 ot the CRC multiframe and low during bit 8 of all other non-sync frames. This pin is unused since the FRS15 input of the Timeslot Zero Receiver is connected internally to the FRS15 output of the CRC Checker. No Connection. PCM Voice Channel Input. In Transmit Demonstration mode this pin is used as the serial data input to the Transmission Multiplexer. Timeslot Zero Receiver (RXTSZ) Macrocell - Data Input (D). This pin is used to input the 2.048 Mbit data stream to this macrocell. This pin is unused since the D input of the Timeslot Zero Receiver is connected internally to the Q output of the HDB3 Decoder. Cyclic Redundancy Check Generator (CRCGEN) Macrocell - Signalling Data Input (D1 N). This pin is used to input the data to be inserted into bit 1 of non sync frames (CRC = 0) or bit 1 of frame 15 of the CRC multiframe (CRC = 1). HDB3 Decoder (HDB3EC) Macrocell - Data Input 1 (RXD1). This input latches the incoming HDB3 encoded data and is rising edge sensitive. The rising edge of this input should not occur within 50 ns of the rising edge of CLK. HDB3 Encoder (HDB3EC) Macrocell - Data Input (D). This pin is used to input NRZ data for conversion into pseudo ternary HDB3 format. This pin is unused since the D input of the HDB3 Encoder is connected internally to the Q output of the Transmission Multiplexer. HDB3 Decoder (HDB3DC) Macrocell - Data Input 2 (RXD2). As RXD1 (MFD3) Cyclic Redundancy Check Generator (CRCGEN) Macrocell - Signalling Data Input (D1S). This pin is used to input the data to be inserted into bit 1 of sync frames (CRC = 0) or bit 1 of frame 13 of CRC multiframe (CRC = 1). Digital supply voltage. 5V (Note 2)
TX MFQ4 17 16 RX
TX
MFQ5
18
17
RX TX
FRS13RZ 19
18
RX1
RX2 MFD1 20 19 RX1
RX2 TX1 TX2 MFD2 21 20 RX1 RX2 TX
MFD3
22
21
RX
TX1 TX2 MFD4 23 22 RX TX
VDD3 VDD
24 _
23
GLOBAL
11
MV1403
PIN DESCRIPTIONS (continued)
Symbol Pin No. DP48 GND2 DEMO 25 26 24 HP44 Mode name (see note 1) GLOBAL GLOBAL Pin name and description
Digital ground. 0V (Note 2) Demonstration pin. A logic high on this pin puts the MV1403 into demonstration mode, RX2 or TX2 with all the transmit or receive macrocells connected together internally. A low on this pin allows access to the macrocells individually (ie. RX1 or TX1 mode). Transmit/Receive Mode pin. A logic high on this pin places the MV1403 in Receive mode RX1 or RX2. A low places it in Transmit mode TX1 or TX2 2.048MHz Master Clock input. Scan Path Test Mode pin. A logic high on this pin places the MV1403 in scan test mode. For normal operation this pin should be tied low. Scan Test Data input. In Scan Path Test Mode, this pin is used as the input to the scan path. CRC Mode pin. This pin is used as the CRC mode input to the CRCGEN (EN input) or RXTSZ (M input) macrocells. A logic high on this pin will put the MV1403 into Cyclic Redundancy Check mode. Cyclic Redundancy Checker (CRCCHK) Macrocell - Data Input (D). This pin is used as the 2.048Mbit serial data input to this macrocell. This pin is unused since the D input ol the CRC Checker is connected internally to the a output of the HDB3 Decoder. Cyclic Redundancy Check Generator (CRCGEN) Macrocell - Data Input (D). This pin is the 2.048 Mbit data input to this macrocell. This pin is unused since the D input to the CRC Generator is connected internally to the a output of the Transmission Multiplexer Frame Sync Input (FRS). This pin is the 8kHz timeslot zero frame marker input to the Timeslot Sixteen Receiver (RXTS16) and Cyclic Redundancy Checker (CRCCHK) macrocells. It is required to be high only during timeslot zero of each frame. This pin is unused since the FRS inputs to the CRC Checker and Timeslot 16 Receiver are connected internally to the TSZ output of the Timeslot Zero Receiver . Frame Sync Input (FRS). This pin is the 8kHz timeslot zero frame marker input. It is required to be high only during timeslot zero of each frame. Cyclic Redundancy Checker (CRCCHK) Macrocell - Timeslot Zero Sync Frame Marker Input (TZS). This 4KHz input is required to be high during timeslot zero of sync frames and change at the beginning of bit 2, timeslot 1 of every frame. This pin is unused since the TZS input of the CRC Checker is connected internally to the TZS output of the Timeslot Zero Receiver. Cyclic Redundancy Check Generator (CRCGEN) Macrocell Timeslot Zero Sync Frame Marker Input (TZS). This 4kHz input is required to be high during timeslot zero of sync frames and change at the beginning of bit 2, timeslot 1 of every frame. Timeslot Sixteen Receiver (RXTS16) Macrocell - 2.048Mbit Serial Data Input (D). The 8 bits of signalling data in timeslot t6 are extracted from this input during timeslot 16. This pin is unused since the D input of the Timeslot 16 Receiver is connected intermally to the (; output of the HDB3 Decoder. Timeslot Sixteen Transmitter (TXTS16) Macrocell - 64kbit Signalling Data Input (D). The continuous stream of data to be output as 8 bit bursts during timeslot 16 is input on this pin. Digital ground,OV. (Note 2)
MODE CLK STM P CRC
27 28 29 30 31
25 26 27 28 29
GLOBAL GLOBAL GLOBAL GLOBAL GLOBAL
MFD5
32
30
RX1 RX2 TX1 TX2
FRS
33
31
RX1
RX2
TX TZS 34 32 RX1
RX2 TX1 .
MFD6
35
33
RX1
RX2 TX
GND3
36
GLOBAL
12
MV1403
PIN DESCRIPTIONS (continued)
Symbol Pin No. DP48 RST 37 HP44 34 Mode name (see note 1) RX Pin name and description
Timeslot Zero Receiver (RXTSZ) Macrocell - Reset Input (RST). A logic high on this pin will reset the state machine of this macrocell, forcing the macrocell out of frame alignment. Due to the 100k pull-up resistors on all the inputs, this pin should be tied low when not in use. Cyclic Redundancy Checker (CRCCHK) Macrocell - Sub-multiframe 2 Error Alarm Output (ER2). A logic high on this output indicates the detection of a CRC error in sub-multiframe 2. Cyclic Redundancy Check Generator (CRCGEN) Macrocell - Data Output (Q). This pin is used to output the data to be inserted into bit 1, timeslot 0. Cyclic Redundancy Checker (CRCCHK) Macrocell - Sub-multiframe 1 Error Alarm Output (ER1). A logic high on this output indicates the detection of a CRC error in sub-multiframe 1. Cyclic Redundancy Check Generator (CRCGEN) Macrocell - Scan Test Data Output (STQ). In scan test mode, this pin is the scan path output of this macrocell. Cyclic Redundancy Checker (CRCCHK) Macrocell - Multiframe Sync Alarm Output (MSA). A logic high on this output denotes that the macrocell is out of CRC multiframe alignment. Timeslot Sixteen Transminer (TXTS16) Macrocell - Timeslot 16 Marker Output (TS16). This output is high only during timeslot 16. Cyclic Redundancy Checker (CRCCHK) Macrocell - Frame 15 Marker Output (FRS15). When the macrocell is in CRC multiframe alignment, this output is high during frame 15 and low during all other non-sync frames. Cyclic Redundancy Checker (CRCCHK) Macrocell - Frame 13 Marker Output (FRS13). When the macrocell is in CRC multiframe alignment, this output is high during frame 13 and low during all other non-sync frames. Timeslot Sixteen Receiver (RXTS16) Macrocell - Signalling Data Output (Q). This pin is used to output the 8 bits of signalling data extracted from timeslot 16 as a continuous 64kbit data stream. Timeslot Sixteen Transmitter (TXTS16) Macrocell - Signalling Data Output (Q). The 8 bit data bursts produced by this macrocell are output at 2.048MHz on this pin during timeslot 16. This output is low at all other times. Timeslot Zero Receiver (RXTSZ) Macrocell - Timeslot Zero Marker Output (TSZ). This output goes high for the 8 periods of timeslot zero and is low at all other times. Timeslot Zero Receiver (RXTSZ) Macrocell - Timeslot Zero Sync Frame Marker Output (TZS). This output is high during timeslot zero of sync frames and changes state at the beginning of bit 2, timeslot 1 of every frame. Timeslot Zero Receiver (RXTSZ) Macrocell - 8kHz Clock Output (CK8). This output goes low at the end of bit 7, timeslot zero and high at the end of bit 7, timeslot 16. Timeslot Zero Receiver (RXTSZ) Macrocell - Channel Reset Output (CCR). This output pulses low for a single period during bit 1, timeslot 1 of sync frames. Digital ground. 0V (Note 2).
MFQ6
38
35
RX
TX MFQ7 39 36 RX
TX
MFQ8
40
37
RX
TX FRS15 41 38 RX
FRS13
42
39
RX
M FQ9
43
40
RX
TX
TSZRZ
44
41
RX
TZSRZ
45
42
RX
CK8
46
43
RX
CCR
47
44
RX
GND4 GND2
48 1
GLOBAL
NOTES 1. TX refers to TX1 and TX2 modes. RX reters to RX1 and RX2 modes. GLOBAL refers to all modes. 2. All the VDD and GND pins of the 48-pin device, and two GND pins of the 44-pin device are connected together internally and as such there is no need to connect up all these supplies. However, it is recommended that all supply pins are connected to facilitate supply decoupling. 3. Since the device is intended as a demonstrator allowing access to the individual macrocells, 100k pull-up resistors have been included on all the input pins to prevent any unconnected inputs from floating.
13
MV1403
ELECTRICAL CHARACTERISTICS
These characteristics are guaranteed over the following conditions (unless otherwise stated) Supply Voltage VDD = 5V 0 .V, Ambient Temperature Tamb = 0 to 70C
STATIC CHARACTERISTICS
Characteristic Low level input voltage High level input voltage Low level output voltage High level output voltage Input leakage current Supply current Input capacitance Output capacitance Pin Min VIL VIH VOL VOH IIL ICC CIN COUT 2.0 0 2.4 -20 -10 1.5 5 5 Value Typ Units Max 0.8 VDD 0.4 VDD -200 +10 3.0 V V V V A A mA pF pF Conditions
ISINK = 10mA ISOURCE = 5mA VIN = VSS VIN = VDD All outputs unloaded
DYNAMIC CHARACTERISTICS
Value Characteristic Clock Clock frequency Clock rise time Clock high time Clock fall time Clock low time Outputs Output propagation delay CDR propagation delay Frame synchronisation & related inputs FRS rising hold time FRS rising setup time FRS falling hold time FRS falling setup time TZS setup time TZS hold time User data setup time International data bits setup time Timeslot Zero data hold time Data inputs Data setup time Data hold time Timeslot 16 transmitter data setup time Timeslot 16 transmitter data hold time HDB3 input data setup time HDB3 input data pulse width Symbol Min fCLK tCR tCH tCF tCL tOPD tCDRPD tFRH tFRs tFFH tFFS tSFS tSFH tUDS IIDS tTZDH tDS tDH tT16DS tT16DH tRXDS tRXDW 50 100 50 100 50 50 50 100 100 50 50 50 50 50 50 Typ 2.048 20 150 20 150 50 50 Max MHz ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Units Conditions
See Fig. 12 See Fig. 12 See Fig. 12 See Fig. 12 See Fig. 17, note 1 See Fig. 18 See Fig. 13 See Fig. 13 See Fig. 13 See Fig. 13 See Fig. 13 See Fig. 13 See Fig. 13 See Fig. 13 See Fig. 13 See Fig. 14, note 2 See Fig. 14, note 2 See Fig. 15, note 3 See Fig. 15, note 3 See Fig. 16 See Fig. 16
488
NOTES 1. The output propagation delay, tOPD, is valid for all outputs except CDR (from the HDB3DC macrocell) and is specified with FRS rising betore CLK. All output delays are measured with a 50pF load. 2. The data setup and hold parameters, tDS and tDH, apply to the following macrocell inputs: D (CRCGEN), D (HDB3EC) PCM DATA (TMUX), D (RXTSZ), FRS13,15 (RXTSZ), RST (RXTSZ), D (RXTS16), D (CRCCHK), P (GLOBAL) 3. Timeslot 16 transmitter data setup and hold times apply to the rising edge of clock cycles 24, 56, 88 etc (see Fig 4)
ABSOLUTE MAXIMUM RATINGS
The Absolute Maximum Ratings are limiting values above which opertaing life may be shortened or specified parameters may be degraded. Positive supply voltage, VDD Inputs Outputs - 0.5 to + 7V VDD + 0.3V to GND - 0.3V VDD + 0.3V to GND - 0.3V
14
MV1403
tCH
VIH (Min) VIL (Max) tCR tCF tCL
Figure 12: Timing - clock inputs
8 CLOCK PERIODS
CLK tFFS
VIH (Min) VIL (Max) tFRS tFFH
tFRH FRS tSFS
VIH (Min) VIL (Max) tSFH VIH (Min) TZS tUDS tTZDH VIH (Min) D1, D3N-D8N tIDS VIH (Min) D1N, D1S VIL (Max) VIL (Max) VIL (Max)
Figure 13: Timing - FRS and related parameters
VIH (Min) CLK VIL (Max) tDS tDH VIH (Min) VIL (Max)
DATA
Figure 14: Timing - data inputs
15
MV1403
VIH (Min) CLK VIL (Max) tT16DS tT16DH VIH (Min) VIL (Max)
D-TXTS16
Figure 15: Timing - Timeslot 16 transmitter data input
VIH (Min) CLK tRXDS tRXDW VIH (Min)
RXD1/RXD2
Figure 16: Timing - RXD inputs
VIH (Min) CLK tRXDS tOPD VOH (Min) VOL (Min)
OUTPUT
Figure 17: Timing - output propagation delay
RXD1/RXD2 tCDRPD
VIL (Max) tCDRPD
CDR
VOL (Max)
Figure 18: Timing - CDR propagation delay
16
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