w79e532 Winbond Electronics Corp America, w79e532 Datasheet - Page 14

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

Port 1
P1.70: General purpose I/O port. Most instructions will read the port pins in case of a port read
Port 4 Control Register A
Port 4 Control Register B
P4xM1, P4xM0
P4xC1, P4xC0
BIT NAME
P1.0 : T2
P1.1 : T2EX
access, however in case of read-modify-write instructions, the port latch is read. Some pins
also have alternate input or output functions. This alternate functions are described below:
Mnemonic: P1
Mnemonic: P4CONA
Mnemonic: P4CONB
Bit:
Bit:
Bit:
Port 4 alternate modes.
=00: Mode 0. P4.x is a general purpose I/O port which is the same as Port 1.
=01: Mode 1. P4.x is a Read Strobe signal for chip select purpose. The address
=10: Mode 2. P4.x is a Write Strobe signal for chip select purpose. The address
=11: Mode 3. P4.x is a Read/Write Strobe signal for chip select purpose. The
Port 4 Chip-select Mode address comparison:
=00: Compare the full address (16 bits length) with the base address registers
=01: Compare the 15 high bits (A15-A1) of address bus with the base address
=10: Compare the 14 high bits (A15-A2) of address bus with the base address
=11: Compare the 8 high bits (A15-A8) of address bus with the base address
External I/O for Timer/Counter 2
Timer/Counter 2 Capture/Reload Trigger
range depends on the SFR P4xAH, P4xAL and bits P4xC1, P4xC0.
range depends on the SFR P4xAH, P4xAL and bits P4xC1, P4xC0.
address range depends on the SFR P4xAH, P4xAL and bits P4xC1, P4xC0
registers P4xAH and P4xAL.
registers P4xAH and P4xAL.
registers P4xAH and P4xAL.
P4xAH and P4xAL.
P41M1
P43M1
P1.7
7
7
7
P41M0
P43M0
P1.6
6
6
6
P41C1
P43C1
P1.5
- 14 -
5
5
5
FUNCTION
P41C0
P43C0
P1.4
4
4
4
P40M1
P42M1
P1.3
W79E532/W79L532
3
3
3
Address: 92h
Address: 93h
Address: 90h
P40M0
P42M0
P1.2
2
2
2
P40C1
P42C1
P1.1
1
1
1
P40C0
P42C0
P1.0
0
0
0