Voice Microcontroller 1 / 7 Ver 3.0 06/99
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
IRQ3 - Timer 3 interrupt
IRQ4 - External interrupt
Voice Microcontroller 2 / 7 Ver 3.0 06/99
Syntek Semiconductor Co., Ltd.
STK88C4831
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 Capacity
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.
STK88C4831
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.
STK88C4831
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.
STK88C4831
5. ABSOLUTE MAXIMUM RATINGS
Operating temperature ........................................................................ 0 to 70 ℃
Storage temperature ...................................................................... -65 to 150 ℃
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 µ
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 µ
A
Input low leakage current Iil Vil=0 -5 µ
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.
STK88C4831
7. IC PAD LAYOUT
IC Substrate Connect To: Vss or floating
Voice Microcontroller 7 / 7 Ver 3.0 06/99
Syntek Semiconductor Co., Ltd.
STK88C4831
Customer Information Sheet
1. Customer's Name : ____________________
2. Project 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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