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Номер произв STK88C4831
Описание Adpcm Voice Controller
Производители Syntec Semiconductor
логотип Syntec Semiconductor логотип 



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STK88C4831 Даташит, Описание, Даташиты
Syntek Semiconductor Co., Ltd.
STK88C4831
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
w IRQ3 - Timer 3 interrupt
w IRQ4 - External interrupt
w.DataSheet4U.comVoice Microcontroller
1/7
Ver 3.0 06/99









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STK88C4831 Даташит, Описание, Даташиты
Syntek Semiconductor Co., Ltd.
STK88C4831
2. PIN DESCRIPTION :
(Total 25 pads)
Pin name
P10-P17
P20-P27
AUD1
PWM1
PWM2
OSC
RESB
CAP
TESTB
VDD
VSS
I/O Function description
I/O 8-bit I/O pins for port 1 with wake-up interrupt
O 8-bit output pins for port 2
O Audio channel 1 current mode D/A output
O Audio channel 1 PWM output
O Audio channel 2 PWM output
I Main system oscillator input pin for chip
I System reset
I Capacitor for PLL circuit.
I Test pin. Keep floating or connect to Vdd
Power input
Power ground
PART
88C4831
88C3731
48KB
37KB
Capacity
8-bit Algorithm
5-bit Algorithm
C000h*8 49150*8 13330h*5 78640*5
9000h*8 36860*8 E660h*5 58980*5
Voice Microcontroller
2/7
Ver 3.0 06/99









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STK88C4831 Даташит, Описание, Даташиты
Syntek Semiconductor Co., Ltd.
3. Block diagram :
STK88C4831
8-bit CPU
OSC
&
Clock Gen.
OSC
CAP
48K bytes ROM
3 Timers
128 bytes RAM
I/O port 1
P10-P17
PWM output
PWM1
PWM2
8-bit D/A with
3-bit volume
control
AUD1
Out port 2
P20-P27
Voice Microcontroller
3/7
Ver 3.0 06/99










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