View ML2502_1566823.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

oki ML2502 ML2502 data sheet (revision 8.0) 1 ML2502 data sheet preliminary record/playback lsi with 128kbit analog cell storage flash memory revision 8.0 apr. 01, 1999 n general description ML2502 is a record/playback lsi that stores analog signal directly into on-chip flash memory (128kbit cell) without digital conversion utilizing new analog storage technology. such unique features as low voltage operability (2.7 ~ 3.3v), no backup requirement and no external mcu requirement makes the ML2502 an ideal choice for handy voice memo, message card, toys and other consumer applications. n features on-chip 128kbit cell analog storage flash memory program/erase cycles 10k cycles data retention period 10 ye ars record/playback control via switch input phrasing mode single-phrase or dual-phrase record/playback time length (at 6.4 khz sampling frequency) in dual-phrase mode max. ap. 10 sec each (entire memory area divided into 2) in single-phrase mode max. ap. 20sec (using the whole memory area by wiring rec1 and rec2 pins, play1 and play2 pins together) sampling frequencies selectable from 4.0 khz, 5.3 khz, 6.4 khz built-in mic. amplifier with agc (auto gain control) built-in lpf (low pass filter) built-in speaker driver allows to use either piezo or dynamic speaker by externally setting up an amplitude ratio. on-chip oscillation circuit (no requirement for an external oscillator) operating voltage 2.7v ~ 3.3v operating temperature -10 c ~ +70 c packaging 30-pin ssop, die form
oki ML2502 ML2502 data sheet (revision 8.0) 2 n block diagram n pin layout pkg code: ssop30-p-56-0.65 sg internal oscillator controller address decoder 128k bit cell analog storage flash memory array analog write & read circuits power supplies lpf dv dd dgnd play2 erase mon rosc lin lout av dd agnd aout + - mout + - + - agc sampling clock sam1 sam2 play1 rec1 rec2 min spin spout+ spout- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 dv dd nc rec1 rec2 play1 play2 erase min mout lin lout avdd avdd spout+ nc 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 sam1 nc sam2 rosc dgnd mon test nc nc aout spin agnd spout- agnd nc (top view)
oki ML2502 ML2502 data sheet (revision 8.0) 3 n pin description rec1 i input start-recording signal for phrase 1 to this pin. "h" level input to this pin initiates recording to phrase 1 memory area. recording goes on while this pin being held "h". in single-phrase mode, the pin is connected to the rec2 pin. the rec1 pin is internally pulled down. pin i/o description rec2 i input start-recording signal for phrase 2 to this pin. "h" level input to this pin initiates recording to phrase 2 memory area. recording goes on while this pin being held "h". in single phrase mode, the pin is connected to the rec1 pin. the rec2 pin is internally pulled down. play1 i input start-playback signal for phrase 1 to this pin. a "h" pulse input to this pin initiates playback of phrase 1. re-inputting a "h" pulse during playback causes to stop playback. in single phrase mode, the pin is connected to the play2 pin. the pin is internally pulled down. play2 i input start-playback signal for phrase 2 to this pin. a "h" pulse input to this pin initiates playback of phrase 2. re-inputting a "h" pulse during playback causes to stop playback. in single phrase mode, the pin is connected to the play1 pin. the pin is internally pulled down. erase i erase-enable signal input pin, used together with the rec1 and/or rec2. input "h" level to the rec1/rec2 pin with this pin being held "h" to erase respective phrase. the pin is internally pulled down. sam1 sam2 i pins used to select a sampling frequency. sam1 sam1 fs l l 4.0khz l h 5.3khz h l 6.4khz h h unused mon o output "h" level during record or playback operation. insert a 30k w resistor between this pin and the dgnd pin. the resistor determines the oscillation frequency for the internal oscillation circuit. rosc i min i input to the microphone amplifier. output from the microphone amplifier. voltage amplitude is automatically controlled to an appropriate output level by the internal agc circuit. mout o lin i input to the line amplifier. connected to inverted input for the internal op. amplifier. output from the line amplifier. connected to the output pin from the internal op. amplifier. connecting resistors to the lin and lout pins configures an inverted amplifier. lout o aout o output analog signal for playback. input to the speaker driver. the resistor's value inserted between the aout and spin pin determines voltage amplitude of the speaker driver. select an appropriate value depending on types of speaker in use. spin i output from the speaker driver. connect a speaker in-between these pins. output two phase-inverted analog signals for playback from the speaker driver. spout+ spout- o dvdd - digital power supply pin. insert a 0.1 m f or larger bypass capacitor between this pin and the dgnd pin. dgnd - digital ground pin. avdd - analog power supply pin. insert a 0.1 m f or larger bypass capacitor between this pin and the agnd pin. agnd - analog ground pin.
oki ML2502 ML2502 data sheet (revision 8.0) 4 n record/playback operation ML2502 has two record/playback modes, dual-phrase record/playback mode and single- phrase record/playback mode. while in dual-phrase record/playback mode the total memory space is divided evenly into two areas for 2-phrase record/playback, the entire memory space is used for one phrase record/playback in single-phrase record/playback mode. in dual-phrase record/playback mode the first half of the memory, i.e. from the top address up to the center address, is assigned to phrase 1, and the second half, i.e. from the center address to the last address, is assigned to phrase 2. record/playback of phrase 1 can be controlled via the rec1 and play1 pins, while phrase 2 can be controlled via the rec2 and play2 pins respectively. in single-phrase mode record/playback must be performed with the rec1 being connected to the rec2 pin and the play1 being connected to the play2 pin respectively. in both playback modes repetitive playback function for the same phrase is available. 1. dual-phrase record/playback mode 1.1 phrase 1 recording operation (1) keep on inputting ? h ? level to the rec1 pin to power up and start recording from the top address of the memory. recording goes on while the rec1 pin being held ? h ? level. (2) the lsi automatically ends recording when the center address has been reached. (3) the lsi automatically shifts to low-power consumption mode after recording ends. (4) to stop recording for phrase 1 before reaching the center address, bring the rec1 pin down to ? l ? level. the lsi automatically shifts to low-power consumption mode after recording stops. (5) during recording operation any signal input to other pins than the rec1 is disregarded. note: re-recording always causes to overwrite the existing recording data for a given phrase. figure 1.1 timing chart for phrase 1 recording operation start stop invalid input stopping process power down powering up recording power down powering down mon rec2 rec1 status
oki ML2502 ML2502 data sheet (revision 8.0) 5 1.2 phrase 1 playback operation (1) input a ? h ? pulse to the play1 pin to power up and start playback from the top address of the memory. (2) the lsi automatically ends playback when the last address of the recorded phrase has been reached. (3) the lsi automatically shifts to low-power consumption mode after playback ends. (4) to stop playback of phrase 1 before reaching the last address, input a ? h ? pulse again to the play1 or play2 pin. this will cause the lsi to stop playback and then automatically shift to low-power consumption mode. (5) during playback operation signal input to the play1 or play2 pin only is valid, any other signal input is disregarded figure 1.2 timing chart for phrase 1 playback operation 1.3 phrase 1 erasing operation (1) while inputting ? h ? level to the erase pin, input a ? h ? pulse to the rec1 pin to start erasing phrase 1. (2) after phrase 1 having been erased, the lsi automatically shifts to power-down mode for low-power consumption. note: erasing operation cannot be abandoned in the middle once getting started. internally, the lsi performs erasing phrase 1 by recording ? silence ? from the top address to address 250. therefore, if you attempt to playback the erased phrase, the playback starts at the top address of the memory and ends at address 250. figure 1.3 timing chart for phrase 1 erasing operation start pulse stop pulse power down powering up playing back power down powering down mon play2 play1 status start pulse power down powering up erasing power down powering down mon rec1 erase status
oki ML2502 ML2502 data sheet (revision 8.0) 6 1.4 phrase 2 recording operation (1) keep on inputting ? h ? level to the rec2 pin to power up and start recording from the top address of the memory. recording goes on while the rec2 pin being held ? h ? level. (2) the lsi automatically ends recording when the last address of the memory has been reached. (3) the lsi automatically shifts to low-power consumption mode after recording ends. (4) to stop recording for phrase 2 before reaching the last address, bring the rec2 pin down to ? l ? level. the lsi automatically shifts to low-power consumption mode after recording stops. (5) during recording operation any signal input to other pins than the rec2 is disregarded. note: re-recording always causes to overwrite the existing recording data for a given phrase. figure 1.4 timing chart for phrase 2 recording operation 1.5 phrase 2 playback operation (1) input a ? h ? pulse to the play2 pin to power up and start playback from the center address of the memory. (2) the lsi automatically ends playback when the last address of the recorded phrase has been reached. (3) the lsi automatically shifts to low-power consumption mode after playback ends. (4) to stop playback of phrase 2 before reaching its last address, input a ? h ? pulse again to the play1 or play2 pin. this will cause the lsi to stop playback and then automatically shift to low-power consumption mode. (5) during playback operation signal input to the play1 or play2 pin only is valid, any other signal input is disregarded figure 1.5 timing chart for phrase 2 playback operation start stop invalid input stopping process power down powering up recording power down powering down mon rec2 rec1 status start pulse stop pulse power down powering up playing back power down powering down mon play2 play1 status stop
oki ML2502 ML2502 data sheet (revision 8.0) 7 1.6 phrase 2 erasing operation (1) while inputting ? h ? level to the erase pin, input a ? h ? pulse to the rec2 pin to start erasing phrase 2. (2) after phrase 2 having been erased, the lsi automatically shifts to power-down mode for low-power consumption. note: erasing operation cannot be abandoned in the middle once getting started. internally, the lsi performs erasing phrase 2 by recording ? silence ? from the center address as far as to address 250. therefore, if you attempt to playback the erased phrase, the playback starts at the center address of the memory and ends at address 250. figure 1.6 timing chart for phrase 2 erasing operation start pulse power down powering up erasing power down powering down mon rec2 erase status
oki ML2502 ML2502 data sheet (revision 8.0) 8 2. single-phrase record/playback mode 2.1 recording operation (1) in this mode the rec1 has to be connected with the rec2 pin. keep on inputting ? h ? level to the rec1 and the rec2 pin to power up and start recording from the top address of the memory. recording goes on while the rec1 and the rec2 pin being held at ? h ? level. (2) the lsi automatically ends recording when the last address of the memory has been reached. (3) the lsi automatically shifts to low-power consumption mode after recording ends. (4) to stop recording before reaching the last address, bring the rec1 and the rec2 pin down to ? l ? level. the lsi automatically shifts to low-power consumption mode after recording stops. (5) during recording operation any signal input to other pins than the rec1 and the rec2 is disregarded. note: re-recording always causes to overwrite the existing recording data for a given phrase. figure 2.1 timing chart for single-phrase recording operation start stop invalid input stopping process power down powering up recording power down powering down mon rec2 rec1 status play2 play1
oki ML2502 ML2502 data sheet (revision 8.0) 9 2.2 playing back operation (1) input ? h ? pulses to the play1 and the play2 pins simultaneously to power up and start playback from the top address of the memory. (2) the lsi automatically ends playback when the last address of the recorded phrase has been reached. (3) the lsi automatically shifts to low-power consumption mode after playback ends. (4) to stop playback of the phrase before reaching its last address, input ? h ? pulses again to the play1 and the play2 pins simultaneously . this will cause the lsi to stop playback and then automatically shift to low-power consumption mode. (5) during playback operation signal input to the play1 or play2 pin only is valid, any other signal input is disregarded. figure 2.2 timing chart for single-phrase playback operation start pulse stop pulse invalid input power down powering up playing back power down powering down mon rec2 rec1 status play2 play1
oki ML2502 ML2502 data sheet (revision 8.0) 10 2.3 erasing the phrase 2 (1) while inputting ? h ? level to the erase pin, input ? h ? pulses to the rec1 and rec2 pins simultaneously to start erasing the phrase. (2) after the phrase having been erased, the lsi automatically shifts to power-down mode for low-power consumption. note: erasing operation cannot be abandoned in the middle once getting started. internally, the lsi performs erasing by recording ? silence ? from the top address as far as to address 250. therefore, if you attempt to playback the erased phrase, the playback starts at the top address of the memory and ends at address 250. figure 2.3 timing chart for single-phrase erasing operation start pulse power down powering up erasing power down powering down mon rec1 erase status rec2
oki ML2502 ML2502 data sheet (revision 8.0) 11 3. repeating playback operation (1) to repeat playback of the same phrase, keep on inputting ? h ? level to the play1 or play2 pin. ? h ? level input to the play1 or play2 causes the lsi to power up and start playback. (2) the lsi automatically restarts playback when the last address of the phrase has been reached. (3) when the playback reaches to the last address of the phrase, with the play1 or play2 pin being held ? l ? level, the lsi automatically ends playback. (4) the lsi automatically powers down after playback ends. (5) to stop playback before repetitive playback session ends, bring the play1 or play2 pin down to ? l ? level once, and then re-input a ? h ? pulse to the play1 or play2 pin. the lsi automatically shifts to low-power consumption mode after playback stops. figure 3.1 timing chart for repetitive playback operation start pulse stop pulse power down powering up playing back power down powering down mon play2 play1 status interval playing back end playing resume plaing
oki ML2502 ML2502 data sheet (revision 8.0) 12 n absolute maximum ratings n recommended operating ranges n electrical characteristics dc characteristics note: 1. applicable only to those input pins without a pull-down resistor . 2. applicable only to those input pins with a pull-down resistor. (rec1, rec2, play1, play2, erase pins) parameter symbol conditions unit v dd t op dgnd=agnd=0v v c range power supply voltage operating temperature 2.7 ~ 3.3 -10 ~ + 70 ? parameter symbol conditions unit v dd t stg ta = 25c ? v c rating power supply voltage storage temperature -0.3 ~ +6.0 -0.3 ~ v dd + 0.3 input voltage v in v -55 ~ +150 parameter symbol conditions unit max. typ. min. v ih dgnd=agnd=0v "l" input voltage "h" input voltage ? ? ? 0.45 40 10 tbd ? 0.8 x v dd -10 10 v v ma ? i oh =40 a i ol =2ma spout output no load v il =0v v ih =v dd dv dd = av dd =2.7v ~ 3.3v, dgnd = agnd =0v,ta= -10 ~ +70c "l" output voltage "h" output voltage "l" input current * 1 "h" input current * 1 operating current consumption powerdown current consumption v il v oh v ol i ih1 i il1 i dd i dds1 a 0.2 x v dd ? v dd - 0.3 a v v ? a a 100 ? "l" input current * 2 "h" input current * 2 i ih2 i il2 i dds2 ta= -10 ~ +50c ta= +50 ~ +70c a a 100 v il =0v v ih =3.0v 10 -10 ? ? ? ? ? ? ? ? ? ? ? ? ?
oki ML2502 ML2502 data sheet (revision 8.0) 13 ac characteristics note: *1. in proportion to sampling frequency. parameter symbol unit max. typ. min. t por min. "h" pulse width for record-start input power-on reset time ? ? ? 15.8 10 ms dv dd = av dd =2.7v ~ 3.3v, dgnd = agnd =0v,ta= -10 ~ +70c t w recst 256 ? s s 279 17 17 17 17 0 0 ? ? ? ? ? ? ? ? ? ? ? ? ms ms ms ms ms ms ms ms min. "l" pulse width for record-stop input setup time for erase input - rec1, rec2 input min. pulse width for erase-start input to rec1,rec2 min. pulse width for playback-start input min. pulse width for playback-stop input powering up time 1 (at erasing) powering up time 2 max. record/playback time length (2-phrase mode) *1 max. record/playback time length (1-phrase mode) *1 erase execution time *1 max. time for mon to fall down at stop recording*1 powering down time ms ms s s 16.5 16.5 10.5 21 56 15.6 256 15.6 15.6 10 20 54 15.4 252 14.8 14.8 9.5 19 52 at fsamp = 6.4 khz t w recsp t w plyst t w plysp t w ersst t werss t w ersh t ws1 t ws12 t w s3 t w s4 t wrp2 t wrp1 t we hold time for erase input - rec1, rec2 input
oki ML2502 ML2502 data sheet (revision 8.0) 14 analog circuit characteristics parameter symbol conditions unit max. typ. min. r min min input resistance ? 7.8 ? 1.45 40 125 ? k w v/v ma ? t ws12 and t ws4 no signal playback dv dd = av dd =2.7v ~ 3.3v, dgnd = agnd =0v,ta= -10 ~ +70c v motp v 28 ? v dd -0.25 v m w db ? db ? v v 0.3 ? i ol = 10ma ? ? 40 0.95 ? 200 ? ? v lotp v aotp 1.35 1.25 output voltage from mout, lout, aout on powering up and powering down 6 4.2 ? lin input impedance line amp. open-loop gain mic. amp. voltage gain control range f in = 0~4khz 8 1 r iop g mic g oline output voltage from spout +/- on powering up and powering down mout- lout load resistance spout+ / spout- amplifier open-loop gain spout+/spout- voltage gain spout +/- output "h" voltage spin input impedance spout +/- output "l" voltage spout output load impedance spout output offset voltage spout load current at peak output f in = 0~4khz ? ? ? 1/2 vdd 1/2 vdd +0.1 1/2 vdd -0.1 ? ? i oh = 10ma 1 1 ? 16 ? ? ? ? ? ? 0.25 ? ? w ? 1.05 v m w v/v k w v spotp v snotp r oop g osp g spc r isp v sph v spl v off r spc i spo t ws12 and t ws4
oki ML2502 ML2502 data sheet (revision 8.0) 15 n timing charts u digital circuit section powering up start recording phrase 1 end recording phrase 1 (recording reaches to the last address) 2.5v vdd internal reset signal status unstable state reseting power down state t por switch input allowed power down state powering up time recording mon rec2 rec1 status t w r ecst t ws12 t w rp1,twrp2 powering down power down state recording mon rec2 rec1 status t ws4 t wrp1, t wrp2
oki ML2502 ML2502 data sheet (revision 8.0) 16 stop recording phrase 1 (recording stopped before the last address) start playback phrase 1 end playback phrase 1 (playback reaches to the last address) power down state powering up time playing back mon play2 play1 status t w plyst t ws12 t wrp1, t w rp2 powering down power down state playing back mon play2 play1 status t ws4 t wrp1, t w rp2 post-recording process power down state recording mon rec2 rec1 status t ws3 powering down t ws4 t w r ecsp
oki ML2502 ML2502 data sheet (revision 8.0) 17 stop playback phrase1 (recording stopped before the last address) start erasing phrase 1 end erasing phrase 1 powering down power down state playing back mon play2 play1 status t w s4 t w plysp power down state powering up time erasing mon rec1 erase status t w ersst t ws1 t we t w erss t w ersh powering down power down state erasing mon erase rec1 status t ws4 t we
oki ML2502 ML2502 data sheet (revision 8.0) 18 u analog circuit section start recording (phrase 1) stop recording (phrase 1) mon rec1 mout lout aout spout+ spout- status v lotp v motp gnd level gnd level gnd level hi-z hi-z t ws12 power down powering up recording aout spout+ spout- status gnd level hi-z hi-z t ws3 post-recording process powering down recording mon rec1 mout lout powerdown gnd level gnd level t ws4 v lotp v motp
oki ML2502 ML2502 data sheet (revision 8.0) 19 start playback (phrase 1) stop playback (phrase 1) mon play1 mout lout aout spout+ spout- status v aotp gnd level gnd level gnd level hi-z hi-z t ws12 power down powering up time playing back v spotp v snotp mon play1 mout lout gnd level gnd level aout spout+ spout- status powering down playing back power down state t ws4 v aotp v spotp v snotp gnd level hi-z hi-z
oki ML2502 ML2502 data sheet (revision 8.0) 20 n application circuit sample single-phrase record/playback, at 4 khz sampling frequency and with a dynamic speaker. 1 2 3 4 5 11 12 13 14 15 6 7 8 9 10 30 29 28 27 26 20 19 18 17 16 25 24 23 22 21 nc dvdd rec1 rec2 play1 play2 erase min mout lin lout avdd avdd spout+ nc nc sam1 sam2 rosc dgnd mon test nc nc aout spin agnd spout- agnd nc ML2502 mic led speaker

▲Up To Search▲

Price & Availability of ML2502

	To Download ML2502 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .