sh6620a SinoWealth Micro-Electronics Corp. Ltd, sh6620a Datasheet - Page 6

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

System register $16 - $18
Equivalent circuit for a single I/O pin
I/O control register:
PAXOUT, PBXOUT, PCXOUT (X = 0, 1, 2, 3)
1: Set I/O as an output buffer.
0: Set I/O as an input buffer (Power on initial).
T0 & WDT
System Register $1C
T0E: T0 signal edge.
0: Increment on low-to-high transition T0 pin (Power on initial).
1: Increment on high-to-low transition T0 pin.
T0S: T0 signal source.
0: OSC 1/4 (Power on initial).
1: Transition on T0 pin.
Address
Address
$1C
$16
$17
$18
PC3OUT
PA3OUT
PB3OUT
BIT3
Bit3
-
CONTROL
DATA IN
RESET
RESET
WRITE
WRITE
PC2OUT
PA2OUT
PB2OUT
DATA
BIT2
Bit2
-
READ
D
CK
D
CK
PA1OUT
PB1OUT
PC1OUT
PXXOUT
DATA
RESET
BIT1
T0S
SET
Bit1
Q
QB
QB
Q
PA0OUT
PB0OUT
PC0OUT
BIT0
T0E
6
Bit0
OR
AND
R/W
W
R/W
W
W
W
V
Set PORTA to be output port
Set PORTB to be output port
Set PORTC to be output port
DD
Bit1: T0 signal source.
Bit0: T0 signal edge.
GND
I/O PIN
Description
Remarks
SH6620A