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usbvision tm ii data decoder ZR36505 vbi data and remote control interface for zr6504 data sheet revision 1.00 november 1999. zoran reserves the right to make changes without further notice to any product herein. zoran makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does zoran assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. zoran products are not designed, intended, or authoriz ed for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the zoran product could create a situation where personal injur y or death may occur.
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 2 of 2 table of contents: 1. serial control ................................ ................................ ................................ ............................ 7 2. vbi data qualifier ................................ ................................ ................................ .................. 12 2.1 vbi input interface ................................ ................................ ................................ ................................ 12 2.2 vbi lines qualifier ................................ ................................ ................................ ................................ . 13 2.3 vbi and ird (remote control) data format ................................ ................................ ...................... 17 3. bulk interface ................................ ................................ ................................ ................................ .......... 21 4. programmable i/o pins ................................ ................................ ................................ ....................... 25 5. soft reset operation ................................ ................................ ................................ ............................. 26 6. mechanical specification ................................ ................................ ................................ .................... 27
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 3 of 3 ZR36505 - vbi (teletext) pipe and remote control interface for usb tv applications the ZR36505 is a complimentary chip for the zr36504 in usb tv applications. combined with c ertain video decoders, it adds a vbi (vertical blank interval) data pipe to the system, which utilizes the general purpose bulk channel of the nt1004. the vbi is used by tv broadcast providers to send digital data hidden in the analog video signal. one or more video lines, taken from lines 1 - 21 of each video field are used for carrying this information - each line providing about 9,600 bits/sec data rate. the ZR36505 provides the application s/w with access to data such as teletext, close - caption, intercast , ir receiver samples, etc. it uses a 1kbyte sram buffer to grabe the processed data from the video decoder during the blank interval time slot, and sends this data to the usb through the zr36504 bulk pipe during the time left prior to beginning of next bl ak interval. for the remote control interface, the input pin io_1 is sampled at 4ksamp/sec rate, and the sampled bits are moved to host computer via the (nt1004) for s/w process. features enables teletext and close - caption supports wst625, wst525, cc62 5, cc525, us nabts, moji (japanese), and jfs formats provides remote control interface with ir receiver (sampled at 4k samp./sec.) low cost, low power, 3.3v operated 24 - pin soic package
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 4 of 4 product description refer to fig.1 for an internal block diagra m of the ZR36505. iic serial interface ZR36505 chip control registers status registers vbi data qualifier bulk interfac e 1kb buff prog. i/o to zr36504 bulk pins (0-2mbps) general purpose i/o pins (remote control, ird, etc.) from zr36504 serial control pins from video decoder. 27mhz 48mhz from zr36504 remote control ir binary sampler (4khz) fig.1 ZR36505 block diagram the iic block uses the lrnack mode of the zr36504 serial control bus to provide access to its internal registers. the address range for output registers and input registers is 0x0 0 - 0x07 each. the internal input and output registers are used by the host (pc s/w via zr36504) to control the parameters of the ZR36505 blocks and to read their status. there are two general i/o pins to be used by s/w for specific designs. the vbi data q ualifier block can be programmed to restrict vbi data capture to any specified range of lines within the video field. also, a specific data type can be defined, to filter out all other types of vbi data. the 1kbyte buffer is used for capturing all vbi dat a from every coming video field (after qualification), and sending it via the bulk interface. this is done for one field at a time, and write/read cannot be done simultaneously. the bulk interface block is designed to match the zr36504 specification. it c an coexist with an audio codec source to share the same clock and data pins of the nt1004. finally, the ZR36505 uses 2 clock sources: 27mhz for vbi data, and 48mhz (from nt1004) for the other blocks. the ZR36505 does not require a crystal of its own.
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 5 of 5 p in assignments (top view) nt1005 usb teletext tm vsync_in 1 yin0 2 yin1 3 yin2 4 yin3 5 yin4 6 yin5 7 yin6 8 yin7 9 hsync_in 10 clk27 11 gnd 12 24 23 22 21 20 19 18 17 16 15 14 13 vdd iicck iicdt io1/ird_in io2 bclk fs_l blk_full blk_en dat_out gnd clk48 table 1 - pin descriptions pin number signal i/o description 24 vdd digital 3.3v power supply 12, 14 gnd digital ground connection 1 vsync_in i video vertical - sync input signal from video deco der 2 hsync_in i video vertical - sync input signal from video decoder 3 - 10 yin0 - yin7 i vbi data - bus from video decoder. usually used also for delivering the digital video samples. 11 clk27 i vbi clock from video decoder. used to sample the vbi data in it s positive edge. this clock is used for capturing and storing the vbi data. 13 clk48 i this is the ZR36505 global clock, which comes from the nt1004. 15 dat_out o vbi data output pin, goes to dat_in pin of the zr36504(which is used for both audio codec t x chan and bulk data in this pin is open drain, and is set to high - z upon power - on or soft reset. it requires an external pull - up resistor. 16 blk_en o bulk data enable output. when set to '1', bulk output data at dat_out pin is sampled into the zr36504by falling edge of bclk . this pin is set to hi - z upon power - on or soft reset. 17 blk_full i "bulk - fifo full" indication signal from nt1004. this signal is normally '0', and is set to '1' when the zr36504bulk - fifo is full. 18 fs_l i audio codec frame - syn c pulse for left channel., which comes from the nt1004. the ZR36505 uses this signal to trigger the beginning of its vbi bulk data output immediately after the 16th
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 6 of 6 bit of audio left. 19 bclk i bulk - data clock (zr36504uses this clock for both audio codec and bulk data). this clock must be set to 2.024mhz for proper operation with ZR36505. table 1 - pin descriptions (continued) pin number signal i/o description 20 - 21 io - 1/ird_in io - 2 i/o general programmable i/o pins. each of these 2 pins has a 5 - volt tolerant open drain output, and it is supposed to be connected to an external pull - up resistor. the host uses these pins as programmable output ports by writing '0' or '1'. by writing '1' and read back, the host can use these pins as input ports - as this allows any external source to force the pull - up resistor. these outputs are set to high - z upon power - on or soft reset. the pin io - 1 is also used as the input for ird data. this pin is internally sampled at 4khz sampling rate. 22 iicdt i/o this pin is used for sending and receiving serial control data between the ZR36505 (slave) and zr36504(master). it operates in the lrnack mode of operation (refer to the zr36504data sheet). this pin is open drain, and is set to high - z upon power - on or soft reset. 23 iicc k i this pin is used as the sampling clock for sending and receiving serial control data between the ZR36505 (slave) and zr36504(master). it operates in the lrnack mode of operation (refer to the zr36504data sheet). table 2 - absolute maximum ratings ( voltages referenced to gnd) rating symbol value unit dc supply voltage v dd - gnd - 0.5 to 4.6 v voltage, any pin to gnd v - 0.5 to v dd +0.5 v dc current drain per pin (excluding v dd , gnd) i 10 ma operating temperature range t a 0 to +70 o c storage tempe rature range t stg - 65 to +150 o c table 3 - electrical characteristics (v dd =3.3v, t a = 0 to 70 o c) characteristic symbol min typ max unit dc supply voltage (v dd to gnd) v dd 3.0 3.3 3.6 v dc supply current (@ v dd =3.3v) i cc - 12 18 ma high level inp ut voltage (other than xin, captrn, and resin) v ih 2.0 - v dd +0.3 * v low level input voltage (other than xin, captrn, and resin) v il - 0.3 - 0.8 v input current v i = v dd +0.3 or gnd i in - 10 +1 +10 m a input capacitance c in - 2.5 7.0 pf
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 7 of 7 3 - state output leakage current v o = v dd +0.3 or gnd i oz - 10 +1 +10 m a output capacitance c out - 2.0 7.0 pf high level output voltage (@ iout = - 4ma) v oh 2.4 - v dd v low level output voltage (@ iout = 4ma) v ol 0 - 0.4 v 1. seri al control the ZR36505 uses a serial control interface to access its internal registers. table 4 - ZR36505 registers list: reg. address reg. name function default value 0 line_len_l d7 - d0: line_len[7..0] 00h 1 line_len_h d2 - d0: line_len[10..8] d7 - d3: r eserved 00h 2 line_win_l d7 - d0: win_offset[7..0] 00h 3 line_win_h d7 - d3: win_len[4..0] d2 - d1: reserved d0: win_offset[8] 00h 4 vbi_reg d7: en_type_qualifier '1': enable '0': disable d6: en_win_qualifier '1': enable '0': disable d5: en_raw_samp les '1': enable '0': disable d4: en_vbi_qualifier '1': enable '0': disable d3 - d0: data_type_qualifier[3..0] 00h 5 blk_oper_ mode d3: bclk_rate '1': 2048khz '0': 1544khz d2: audio_dat '1': exists '0': does not exist d1: audio_rate ' 1': 16ks/s '0': 8ks/s d0: audio_stereo '1': stereo '0': mono d7: blk_io_en '1': en bulk output pins. '0': disable. d6 - d4: reserved 00h 6 io_reg d0: io_1 read/write level of ZR36505 pin io - 1 d1: io_2 read/write level of ZR36505 pin io - 2 d7 - d 2: reserved 00h 7 soft_reset d0: soft_reset '1' : perform reset this reg is always read 0x00 (even after writing 0x01). writing 0x01 to this register will result in a general reset operation to the ZR36505, leaving all registers in their default values. 00h the serial bus consists of a clock signal and a data signal, which relate to the ZR36505 as a bus slave (where the zr36504 is used as the bus master). the ZR36505 device address is 0xee for a write operation, and 0xef for a read operation.
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 8 of 8 the diagram in the following page specifies general read and write transactions. in both transactions the register address is auto - incremented, which requires from the host computer to define the address of the first register only. the data bytes are then sent or received one after the other from the first register to the last one (any number of registers is possible). a read transaction requires a write sequence of 0 data bytes, in order to define the first address register to be read.
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 9 of 9 s 0xee register addrss n ak ak ak data(n) ak data(n+1) ak data(n+j) ak p optional write transaction s 0xef ak ak data(n) ak data(n+1) ak data(n+j) nak optional read transaction p s = start condition p = stop condition ak = host ack nak = host nack data = host data data = nt1005 data ak = nt1005 ack s 0xee register addrss n ak ak ak p define register address n it is recommended to set the zr36504(master) chip to its iic lrnack mode of operation to communicate with the ZR36505. the following waveforms and timing diagrams specify the iic serial interface bus in the signal level:
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 10 of 10 iicck iicdt d7 d6 d5 d4 d3 d2 d1 d0 x ack iicck iicdt write address r/w byte 1 r/w byte n note: start is defined when the iicdt turns from '1' to '0' while the iicck is '1'. stop is defined when the iicdt turns from '0' to '1' while the iicck is '1'. the address byte is written like any other byte. stop start nack ack stop stop end of write sequence end of read sequence iicck iicck iicdt iicdt data is sampled on the down going edge of iicck start/stop timings iicck iicdt tsu:sta thd:sta tsu:sto data timings iicck iicdt out thigh thd:do tlow tsu:do dn dn+1 iicdt in data valid data valid thd:di tsu:di
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 11 of 11 table 5 - serial control timings symbol parameter min max unit t su:sta start condition setup time 5300 - ns t hd:sta start condition hold time 5300 - ns t su:sto stop condition setup time 5300 - ns t high clock high time 5300 - ns t low clock low time 5300 - ns t su:do data output setup time 2500 2670 ns t hd:do data output hold time 2500 2670 ns t su:di data input setup time 20 - ns t hd:di data inp ut hold time 0 - ns fiicck frequency of iicck clock signal 0 100 khz
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 12 of 12 2. vbi data qualifier 2.1 vbi input interface the ZR36505 is designed to connect to the 8 - bit vbi output bus of the video decoder (philips saa7113 in its ccir - 656 mode of operation). this b us is sampled by the rising edge of clk27 (27mhz clock, which is also provided by the video decoder chip), and provides the processed data bytes in the blank lines. the same bus contains the y/u/v video data on the valid video lines, which go directly to t he nt1004. the vbi input interface consists of the following signals: y_in[7..0] ( inputs ) this is the 8 - bit vbi bus (contains also the y/u/v samples in non - blank lines). vsync_in ( input ) this is the negative vertical synchronization pulse, which i ndicates the start of a new video field (interlace mode). hsync_in ( input ) this is the negative horizontal synchronization pulse, which indicates the start of a new video line. clk27 ( input ) this signal is the video pixel clock. it is used by the zr 36505 to sample all the other inputs in the digital video interface. it is also used by all state machines and logic to capture the vbi data into the 1kbyte on - chip memory. the timing of the vbi input bus, as expected by the ZR36505 is specified in the fo llowing timing diagram:
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 13 of 13 first line in a field last line in a field vsync_in hsync_in hsync_in clk27 y_in[7..0] b0 b1 b2 xx xx b3 about 64us vsync_in detail clk_27 vsync_in, hsync_in, y_in[7..0] valid 90% 10% 90% 90% 10% 10% tsu > 15ns th > 10ns 2.2 vbi lines qualifier the vbi lines are defined in the range 2 - 21 of the 1st and 2nd fields, but in most tv stations not all the vbi lines are used for digital data. the ZR36505 provides a way of restricting the search range, and filtering out the undesired data. this allows the ZR36505 to produce smaller buffers of data to be delivered via the usb bulk channel, which do not interfere with the isochroneous video and a udio channels. to do this, the ZR36505 uses the following qualifiers:
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 14 of 14 line window qualifier (regs. 0 - 3): line_len_l (reg. 0) d7 d6 d5 d4 d3 d2 d1 d0 line_len[7..0] line_len_h (reg. 1) d7 d6 d5 d4 d3 d2 d1 d0 resrved resrved resrved resrved resrved l ine_len[10..8] line_win_l (reg. 2) d7 d6 d5 d4 d3 d2 d1 d0 win_offset[7..0] line_win_h (reg. 3) d7 d6 d5 d4 d3 d2 d1 d0 win_len[4..0] resrved resrved win_offset[8] line_len[10..0] win_len[4..0] win_offset[8..0] 1 2 3 last line 21 23 24 4 the dark window represents the line window qualifier. line_len[10..0] is counted from the up - going edge of the hsync_in pulse and relates to clk27 cycles, and win_offset[8..0] is counted from the up - going edge of the vsync_in pulse and relates to hsync_in pulses. note that bit d6 of vbi_reg (reg.4) should be enabled: vbi_reg (reg. 4)
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 15 of 15 d7 d6 d5 d4 d3 d2 d1 d0 en_win_qualifier
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 16 of 16 vbi window qualifier: to enable vbi window qualifier, bit d4 of vbi_reg (reg.4) should be set to '1'. this will restrict data capture to those lines that are reported "vbi lines" by the video decoder. normally, the vbi lines are expected to be lines 2 - 21. vbi_reg (reg. 4) d7 d6 d5 d4 d3 d2 d1 d0 en_vbi_qualifier 1 2 last line 21 vbi qualifier window (lines 2-21) note that if both bits d4 and d6 of vbi_reg (reg.4) are enabled, the data capture window will consist of all lines that are common to the vbi wondow and the given line window. vbi type qualifier: to enable vbi type qualifier, bit d7 of vbi_reg (reg.4) should be set to '1', and the desired vbi type code should be defined in the data_t ype_qualifier[3..0] field (bits d3 - d0 of vbi_reg). vbi_reg (reg. 4) d7 d6 - d4 d3 d2 d1 d0 en_type_qualifier data_type_qualifier[3..0] refer to table 6 for available vbi data type codes for this qualifier. note that the same code should be defined to th e video decoder for specific lines in order to get any data that will match this qualifier.
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 17 of 17 raw samples: to enable raw samples, bit d5 of vbi_reg (reg.4) should be set to '1': vbi_reg (reg. 4) d7 d6 d5 d4 d3 d2 d1 d0 en_raw_samples when raw s amples are enabled, up to 720 raw samples of a vbi line (or any other video line) can be provided for s/w processing. if the en_raw_samples bit is not set, raw samples are filtered out by default. 2.3 vbi and ird (remote control) data format during the vert ical blank time interval, the vbi data qualifier stores the incoming vbi data into the internal 1kbyte sram. soon after that, all binary samples from the ird input (io_1) are added (about 8 - 12 bytes per video field). it is assumed that the total vbi data a nd ird data in a single video field never exceeds the 1kb boundary, and that all accumulated data can be transfered via the bulk port until the beginning of next blank interval. the data that is transfered to the host computer via the bulk interface conta ins an additional field synchronization burst (which is produced after the vbi data and before the ird data), and is specified in the following diagrams:
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 18 of 18 vbi data for line # n vbi data for line # n+1 vbi data for line # n+l-1 field synchronization burst 16 bytes of 0x00 vbi data for line # n+2 vbi data for line # n vbi data for video field # i vbi data for video field # i+1 general vbi data structure header byte # 1: sdid header byte # 2: dc header byte # 3: idi1 header byte # 4: idi2 data byte # 1 data byte # 2 data byte # n vbi data structure for any line line received data bytes line header bytes ird data (8-12 bytes) ird data for video field # i
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 19 of 19 the following tables specifies the line header bytes: sdid d7 d6 d5 d 4 d3 d2 d1 d0 '1' '0' '0' '0' '0' '1' '0' '1' dc d7 d6 d5 d4 d3 d2 d1 d0 '1' '0' dc5 dc4 dc3 dc2 dc1 dc0 dc[5:0] is the number of data bytes that were actually received in this line. note that this number may be different than the expected numbe r of data bytes, due to noise or corruption in the received analog signal. dc[5:0]='000000' means that no data bytes follow the line header. idi1 d7 d6 d5 d4 d3 d2 d1 d0 op fid l8 l7 l6 l5 l4 l3 l[8:3] : msbits of line number (look for lsbits 2:0 i n idi2 byte). fid : field identifier. '0' means first field, '1' means second field. op is odd parity bit. examp.: d6:d0='0000101' ==> op='1', idi1=0x85. idi2 d7 d6 d5 d4 d3 d2 d1 d0 op l2 l1 l0 dt3 dt2 dt1 dt0 op is odd parity bit. examp.: d6 :d0='1110000' ==> op='0', idi1=0x70. l[2:0] : lsbits of line number (look for msbits 8:3 in idi1 byte). dt[3:0] defines the vbi data type for the given line. the host computer should define the data type per every vbi line (lines between 2 - 21). the v ideo decoder needs this information in order to look for the given data type per line (there is no auto detect). regardless of decoding success, the same data type code that was programmed by the host controller will be returned in the dt[3:0] nibble.
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 20 of 20 th e following table specifies the data type codes (dt[3:0]): table 6 - vbi data type codes dt[3:0] vbi data type standard expected number of data bytes 0000 teletext eurowst, ccst wst625 42 0001 european closed caption cc625 2 0010 video programming s ervice vps 26 0011 wide screen signalling bits wss 14 0100 us teletext (wst) wst525 34 0101 us closed caption (line 21) cc525 2 0110 video component signal s/w mode 718 0111* oversampled cvbs data (do not use) ** intercast ** 1000 teletext general t ext 42 1001 vitc/ebu time codes (europe) vitc625 11 1010 vitc/ebu time codes (usa) vitc625 11 1011* reserved (do not use) 1100 us nabts nabts 34 1101 moji (japanese) japtext 35 1110 japanese format switch (l20/22) jfs 26 1111* active video region (do not use) 718 the ird (remote control) data header byte contains two fields as specified bellow. it is followed by 7 to 11 bytes (depends one broadcast system pal/ntsc, and sampling phase): ir_header d7 d6 d5 d4 d3 d2 d1 d0 '0' '1' '1' '1' i rd_length ird_length contains the number of bytes for ird data samples that follow the header.
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 21 of 21 3. bulk interface the bulk interface in the ZR36505 is capable of transferring serial data from the 1kb buffer to the zr36504 at a bit rate of up to 2mbit/sec. the bulk channel takes advantage of the existing interface for the audio codec. in order to work simultaneously with the audio channel, the ZR36505 stops the data transfer from time to time - as specified in the bulk waveform diagram. the ZR36505 pins f or the bulk interface are bclk, dat_out, blk_en, blk_full, and fs_l. the signal fs_l is monitored by the ZR36505 in order to coexist with the audio channel (if exists). the following parameters in the blk_oper_mode register (reg. 5) must be properly defin ed to match the zr36504 setup: blk_oper_reg (reg. 5) d7 d6 - d4 d3 d2 d1 d0 blk_io_en resrved bclk_rate audio_dat audio_rate audio_stereo blk_io_en - this bit enables the ZR36505 bulk control output signals. when this bit is '0', the dat_out and blk_en pins are constant hi - z. bclk_rate - this bit defines the bclk frequency, and must match the appropriate parameter that is programmed in the audo_cont register of the zr36504(reg.50, d7 - d6). bclk_rate='1' defines 2048khz (= '11' in nt1004), and bc lk_rate='0' defines 1544khz (= '10' in nt1004). audio_dat - this bit defines whether or not the audio channel is active, and must match the appropriate parameter that is programmed in the audo_cont register of the zr36504(reg.50, d0). audio_dat='1' define s audio active (= '1' in nt1004), and audio_dat='0' defines that there is no audio data sharing the bus (= '0' in nt1004). audio_rate - this bit defines the audio sampling rate, and must match the appropriate parameter that is programmed in the audo_cont register of the zr36504(reg.50, d5). audio_rate='1' defines 16ks/sec (= '1' in nt1004), and audio_rate='0' defines 8ks/sec (= '0' in nt1004). audio_stereo - this bit defines the audio stereo/mono mode, and must match the appropriate parameter that is pro grammed in the audo_cont register of the
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 22 of 22 zr36504(reg.50, d4). audio_stereo='1' defines stereo mode (= '1' in nt1004), and audio_stereo ='0' defines mono mode (= '0' in nt1004).
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 23 of 23 the following waveform diagrams specify the procedure and timings for the zr 36505 bulk interface. note that the output data is supposed to be sampled on the falling edge of the bclk clock signal. the blk_en output is set to '1' to indicate the beginning of a byte sequence; it always turns to '1' before the most significant bit of the first byte, and returns to '0' after the least significant bit of the last byte in sequence. when the blk_full input signal turns '1', the ZR36505 waits (by switching blk_en to '0') until the blk_full indication returns to '0'. b1[7] dsu dh besu bclk blk_en dat_out b1[6] b1[5] b1[4] bn[2] bn[1] bn[0] beh hi-z hi-z if the audio channel is enabled (bit d2 of reg.5 is '1'), the ZR36505 waits at least 16 clock cycles after the fs_l pulse before beginning to send its own data (if bit d0 of reg.5 is '1', it waits for 32 clock cycles). during this time it keeps the d at_out signal in the hi - z state, in order not to interfere with the audio data. bclk blk_en dat_out b1[7] b1[6] fs_l 1 2 3 4 b1[5] 16 (32 in stereo mode) keep hi-z in order not to interfere with audio data x
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 24 of 24 bclk blk_en dat_out bn+1[7] blk_full bn[0] bn[1] bn+1[6] bfhsu bflsu hi-z table 7 - bulk interface timings parameter symbol min max unit setup time from blk_en high to bclk low besu 100 - n s hold time from bclk low to blk_en low beh 100 - ns setup time from dat_in valid to bclk low dsu 100 - ns hold time from bclk low to dat_in valid dh 100 - ns setup time from blk_full high to bclk high bfhsu 80 - ns hold time from blk_full low to bcl k high bflsu 0 - ns bclk frequency freq.bclk 1544 2048 khz
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 25 of 25 4. programmable i/o pins the ZR36505 has two programmable i/o pins for general purpose usage. these are io - 1 and io - 2 pins, which are open - drain. each of these pins - if used - must be conn ected to an external pull - up resistor to 3.3v (if not used, it can be tied to gnd). the external pull - up resistor should be in the range 1 - 10k w . to use these pins as inputs, the host computer should write '1' to the appropriate bit in the io_reg register (reg. 6); these are io_1 and io_2 bits respectively. in this condition, the voltage level presented on the io - 1 or io - 2 pin can be read by the host computer via the appropriate bit ('0' represents <0.8v, '1' represents >2.0v). to use these pins as outputs , the host computer should write the output value to the appropriate bit in the io_reg register; in this condition, and assuming that no external device forces the voltage level presented on the io - 1 or io - 2 pin, the written value will be reflected out ('0 ' will generate 0v, '1' will generate 3.3 - 5.0v). io_reg (reg. 6) d7 d6 d5 d4 d3 d2 d1 d0 resrved resrved resrved resrved resrved resrved io_2 io_1 upon a soft reset operation, the io - 1 and io - 2 pins are cleared to '0'.
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 26 of 26 5. soft reset operation it is strongly recommended that the s/w application will perform a soft reset to the ZR36505 prior to any other operation. all registers will contain their default values after this operation (refer to table 4 for default values). to perform a soft reset, the value 0x01 must be written in the soft_reset register (reg. 7). there is no need to write 0x00 after writing 0x01, because this register is automatically cleared. soft_reset (reg. 7) d7 - d1 d0 resrved soft_reset
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 27 of 27 6. mechanical specification dimensions i n inches. 24-pin 300-mil soic gull wing 1 24 0.606 0.402 0.016 0.296 0.099 0.033 .019 x 45 typ +.017 -.008 +.003 -.004 +.004 -.003 .050 typ +.005 -.006 +.007 -.007 +.017 -.017
zoran corporation usbvision ii data decoder ZR36505 data sheet november - 99 page 28 of 28 http://www.zoran.com for more information, contact zoran?s san ta clara office or the office nearest you: usa zoran corporation 3112 scott boulevard santa clara, ca 95054 - 3317 tel: 408 - 919 - 4111 fax: 408 - 919 - 4122 israel zoran microelectronics ltd. advanced technology ctr. p.o. box 2495 haifa, 31024 israel tel : +972 - 4 - 8545 - 777 fax: +972 - 4 - 8551 - 551 china zoran china office suite 2507 electronics science & tech building 2070 central shennan rd. shenzhen, guangdong, 518031 p.r. china tel : +86 - 755 - 378 - 0319 fax: +86 - 755 - 378 - 0852 japan zoran japan office 2 - 2 - 8 roppongi, minato - ku tokyo 106 - 0032, japan tel : +81 - 03 - 5574 - 7081 fax: +81 - 03 - 5574 - 7156 taiwan zoran taiwan office 4f - 1, no. 5, alley 22 lane 513, reikuang rd. taipei, taiwan r.o.c. tel : +886 - 2 - 2659 - 9797 fax: +886 - 2 - 2659 - 9595 canada zoran toronto lab 2175 queen s t. east, suite 302 toronto, ontario m4e 1e5 canada tel : (416) 690 - 3356 fax: (416) 690 - 336

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