w78e516b Winbond Electronics Corp America, w78e516b Datasheet - Page 11

• Manufacturer Part Number: w78e516b
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

P4CONB (C3H)
P4CONA (C2H)
7, 6
5, 4
3, 2
7, 6
5, 4
3, 2
BIT
BIT
1, 0
1, 0
P41CMP1
P41CMP0
P40CMP1
P40CMP0
P43CMP1
P43CMP0
P42CMP1
P42CMP0
P41FUN1
P41FUN0
P40FUN1
P40FUN0
P43FUN1
P43FUN0
P42FUN1
P42FUN0
NAME
NAME
The P4.1 function control bits which are the similar definition as P43FUN1,
P43FUN0.
The P4.1 address comparator length control bits which are the similar
definition as P43CMP1, P43CMP0.
The P4.0 function control bits which are the similar definition as P43FUN1,
P43FUN0.
The P4.0 address comparator length control bits which are the similar
definition as P43CMP1, P43CMP0.
00: Mode 0. P4.3 is a general purpose I/O port which is the same as Port1.
01: Mode 1. P4.3 is a Read Strobe signal for chip select purpose. The address
10: Mode 2. P4.3 is a Write Strobe signal for chip select purpose. The address
11: Mode 3. P4.3 is a Read/Write Strobe signal for chip select purpose. The
Chip-select signals address comparison:
00: Compare the full address (16 bits length) with the base address register
01: Compare the 15 high bits (A15 − A1) of address bus with the base
address register P43AH, P43AL.
10: Compare the 14 high bits (A15 − A2) of address bus with the base
address register P43AH, P43AL.
11: Compare the 8 high bits (A15 − A8) of address bus with the base address
The P4.2 function control bits which are the similar definition as P43FUN1,
P43FUN0.
The P4.2 address comparator length control bits which are the similar
definition as P43CMP1, P43CMP0.
range depends on the SFR P43AH, P43AL, P43CMP1 and P43CMP0.
range depends on the SFR P43AH, P43AL, P43CMP1 and P43CMP0.
address range depends on the SFR P43AH, P43AL, P43CMP1, and
P43CMP0.
P43AH, P43AL.
register P43AH, P43AL.
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FUNCTION
FUNCTION
Publication Release Date: April 22, 2008
W78E516B
Revision A12