sh6620a SinoWealth Micro-Electronics Corp. Ltd, sh6620a Datasheet - Page 2

• Manufacturer Part Number: sh6620a
• Description: Mask 4-bit Microcontroller
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

Block Diagram
Pin Description
Pin No.
10 - 13
17 - 18
1 - 2
6 - 9
14
15
16
3
4
5
Designation
TIMER
INTERRUPT
(UP COUNTER)
PORTB0 - 3
PORTA2, 3
PORTA0, 1
TIMER (3-BIT)
8-BIT TIMER
WATCHDOG
PORTC0 - 3
RESET
GND
OSCO
OSCI
OPTION ROM
GND
V
T0
DD
V
WDT TIME
OUT
DD
XTAL/RC
RC
T0
I/O
I/O
I/O
I/O
I/O
O
P
P
I
I
I
PRESCALER
OSCI
REG.
OSC
1024 X 16BIT
DATA RAM
64 X 4BIT
Bit programmable I/O pins
Timer Clock/Counter (Schmitt Trigger input)
Reset input (Active Low) (Schmitt Trigger input)
Ground
Bit programmable I/O pins, Vector Interrupt (Active falling edge)
Bit programmable I/O pins, Vector Interrupt (Active falling edge)
Power Supply
OSC output pin. There is a signal with a frequency of F
OSC input pin can be connected to crystal﹑ ceramic or external resistor
Bit programmable I/O pins
ROM
OSCO
2
RESET
PORTC (4 BITS)
PORTA (4 BITS)
PORTB (4 BITS)
CPU
Description
PORTA [3:0]
PORTB [3:0]
PORTC [3:0]
osc
/4 for RC mode
SH6620A