w79e532 Winbond Electronics Corp America, w79e532 Datasheet - Page 20

• Manufacturer Part Number: w79e532
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

Continued
Port 3
P3.7-0: General purpose I/O port. Each pin also has an alternate input or output function. The
Interrupt Priority
IP.7:
PT2:
PS:
PT1:
PX1:
PT0:
PX0:
Program 64KB APFlash0
Program 64KB APFlash1
Read 4KB LDFlash
Read 64KB APFlash0
Read 64KB APFlash1
alternate functions are described below.
ISP Mode
This bit is un-implemented and will read high.
This bit defines the Timer 2 interrupt priority. PT2 = 1 sets it to higher priority level.
This bit defines the Serial port 0 interrupt priority. PS = 1 sets it to higher priority level.
This bit defines the Timer 1 interrupt priority. PT1 = 1 sets it to higher priority level.
This bit defines the External interrupt 1 priority. PX1 = 1 sets it to higher priority level.
This bit defines the Timer 0 interrupt priority. PT0 = 1 sets it to higher priority level.
This bit defines the External interrupt 0 priority. PX0 = 1 sets it to higher priority level.
Mnemonic: P3
Mnemonic: IP
P3.7
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
Bit:
Bit:
T1
T0
TxD
RxD
RD
INT1
INT0
WR
BANK
P3.7
0
1
0
0
1
7
7
-
Strobe for read from external RAM
Strobe for write to external RAM
Timer/counter 1 external count input
Timer/counter 0 external count input
External interrupt 1
External interrupt 0
Serial port 0 output
Serial port 0 input
WFWIN
P3.6
0
0
1
0
0
6
6
-
NOE
P3.5
PT2
1
1
0
0
0
- 20 -
5
5
NCE
0
0
0
0
0
P3.4
PS
4
4
CTRL<3:0>
0001
0001
0000
0000
0000
P3.3
PT1
W79E532/W79L532
3
3
Address: B0h
Address: B8h
P3.2
PX1
2
2
Address in
Address in
Address in
Address in
Address in
SFRAH,
SFRAL
P3.1
PT0
1
1
Data out
Data out
Data out
SFRFD
Data in
Data in
P3.0
PX0
0
0