voice microcontroller 1 / 7 ver 3.0 06/99 syntek semiconductor co., ltd. stk8 8 c 4831 1. features : * operating voltage : 2.5v - 3.5v. * maximum cpu operating frequency : 4mhz at 2.7v * built-in rc oscillator circuit. the oscillation frequency is controlled by an external resistor. * built-in pll circuit to generate the system clock with 5 times oscillation frequency. * audio output ports with 3-bit loudness control - one current output port for speaker output. - two pwm output ports can drive 8,16,64 ohm speaker or buzzer directly. * i/o port. - 8 i/o pins. - port 1 with selectable interrupt. - port 1 with 6 cds interface and 2 schmitt trigger input. * output port - 8 output pins. - port 2 with 8 inverter type output pins. * built in 128 bytes ram *built in rom for program and speech data 48k bytes for 88c4831 37k bytes for 88c3731 * three 8-bit timers. * five interrupt sources : nmi - watchdog timer interrupt irq1 - timer 1 interrupt irq2 - timer 2 interrupt irq3 - timer 3 interrupt irq4 - external interrupt
voice microcontroller 2 / 7 ver 3.0 06/99 syntek semiconductor co., ltd. stk8 8 c 4831 2. pin description : (total 25 pads) pin name i/o function description p10-p17 i/o 8-bit i/o pins for port 1 with wake-up interrupt p20-p27 o 8-bit output pins for port 2 aud1 o audio channel 1 current mode d/a output pwm1 o audio channel 1 pwm output pwm2 o audio channel 2 pwm output osc i main system oscillator input pin for chip resb i system reset cap i capacitor for pll circuit. testb i test pin. keep floating or connect to vdd vdd power input vss power ground part c apacity 8- bit algorithm 5 -bit algorithm 88c4831 48kb c000h*8 49150*8 13330h*5 78640*5 88c3731 37kb 9000h*8 36860*8 e660h*5 58980*5
voice microcontroller 3 / 7 ver 3.0 06/99 syntek semiconductor co., ltd. stk8 8 c 4831 3. block diagram : 8-bit cpu 48k bytes rom 128 bytes ram osc & clock gen. 3 timers pwm output 8-bit d/a with 3-bit volume control i/o port 1 out port 2 pwm1 pwm2 aud1 p10-p17 p20-p27 osc cap
voice microcontroller 4 / 7 ver 3.0 06/99 syntek semiconductor co., ltd. stk8 8 c 4831 4.data/control register line up 1) sleep mode register. write only. 2) irq flag register. read & write. 3) port 0 data. read & write. 4) port 0 control . write only. 5) port 1 data. write only. 6) port 0 interrupt control. write only. 7) port 1 pull-up control. write only. 8) timer 1,2,3 data. write only. 9) overall control. write only. 10) loudness control. write only 11) data for audio. write only. 12) watchdog timer clear. write only.
voice microcontroller 5 / 7 ver 3.0 06/99 syntek semiconductor co., ltd. stk8 8 c 4831 5. absolute maximum ratings operating temperature ........................................................................ 0 to 70 j storage temperature ...................................................................... -65 to 150 j supply voltage ............................................................................................... 7 v input voltage ........................................................................... -0.6 to vdd+0.6 v 6. electrical characteristic : parameter symbol condition min typ. max unit supply voltage vdd 2.5 3.0 3.5 v rosc rosc 650 ohm rc oscillation frequency ? sys vdd=2.7v 400 800 khz operating current idd vdd=3v, ? sys=4mhz 1.5 ma standby current istdby vdd=3v, ? sys=4mhz 1 ma sleep mode current islp vdd=3v 1 m a input high voltage vih vdd=3.0v 2.0 v input low voltage vil vdd=3.0v -0.6 0.8 v input high leakage current iih vih=vdd 1 m a input low leakage current iil vil=0 -5 m a output high voltage voh ioh=-2ma vdd- 0.4 vdd v output low voltage vol iol=4ma 0 0.4 v output high voltage (pwm1, pwm2) voh vdd=3v, ioh=-60ma vdd-1 vdd v output low voltage (pwm1, pwm2) vol vdd=3v, iol=75ma 0 1 v aud (d/a full scale) io vdd=3v, rl=100 ohm -4.0 ma
voice microcontroller 6 / 7 ver 3.0 06/99 syntek semiconductor co., ltd. stk8 8 c 4831 7. ic pad layout ic substrate connect to: vss or floating
voice microcontroller 7 / 7 ver 3.0 06/99 syntek semiconductor co., ltd. stk8 8 c 4831 customer information sheet 1. customer's name : ____________________ 2. p roject title : _________________________ 3. syntek part number : ___________________ (will be filled by syntek) 4. package --------- ( ) chip ( ) qfp 6. customer code : code form ----------------- ( ) eprom ( ) file _______________ checksum ----------------- 0000-3fff __________h 4000-7fff __________h 8000-bfff __________h 0000-bfff __________h 7. others : customer : __________________ date : __/__/__ salesman : __________________ date : __/__/__
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