w79e532 Winbond Electronics Corp America, w79e532 Datasheet - Page 18

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

Port 4
P4.3-0: Port 4 is a bi-directional I/O port with internal pull-ups. Port 4 can not use bit-addressable
Interrupt Enable
EA:
ET2:
ES:
ET1:
EX1:
ET0:
EX0:
Slave Address
SADDR: The SADDR should be programmed to the given or broadcast address for serial port 0 to
ROM Banking Control
EN128K: On-chip ROM banking enable. Set this bit to enable APFlash0 and APFlash1 by banking
DCP1x: A16 selection. By default, P1.7 is defined as A16.
DCP12
DCP11
DCP10
A16
instruction (SETB or CLR).
Global enable. Enable/disable all interrupts.
Enable Timer 2 interrupt.
Enable Serial Port 0 interrupt.
Enable Timer 1 interrupt
Enable external interrupt 1
Enable Timer 0 interrupt
Enable external interrupt 0
which the slave processor is designated.
mechanism. The P1.x is selected to be the auxiliary highest address line A16.
Mnemonic: ROMCON
Mnemonic: P4
Mnemonic: IE
Mnemonic: SADDR
P1.0
Bit:
Bit:
Bit:
Bit:
0
0
0
EA
7
7
7
7
-
-
P1.1
0
0
1
ES1
6
6
6
6
-
-
P1.2
0
1
0
ET2
- 18 -
5
5
5
5
-
-
P1.3
0
1
1
ES
4
4
4
4
-
-
P1.4
EN128K DCP12 DCP11 DCP10
1
0
0
P4.3
ET1
W79E532/W79L532
3
3
3
3
Address: A9h
Address: A5h
Address: A8h
P1.5
1
0
1
P4.2
EX1
Address: ABh
2
2
2
2
P1.6
P4.1
ET0
1
1
0
1
1
1
1
P1.7
P4.0
EX0
1
1
1
0
0
0
0