W78LE58_06 Datasheet, PDF (9/34 Pages) Winbond – 8-BIT MICROCONTROLLER

W78LE58/W78L058A
P4CONB (C3H)
BIT
NAME
FUNCTION
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
range depends on the SFR P43AH, P43AL, P43CMP1 and P43CMP0.
7, 6 ^{P43FUN1 10: Mode 2. P4.3 is a Write Strobe signal for chip select purpose. The address}
P43FUN0
range depends on the SFR P43AH, P43AL, P43CMP1 and P43CMP0.
11: Mode 3. P4.3 is a Read/Write Strobe signal for chip select purpose. The
address range depends on the SFR P43AH, P43AL, P43CMP1, and
P43CMP0.
Chip-select signals address comparison:
00: Compare the full address (16 bits length) with the base address register
P43AH, P43AL.
P43CMP1 ^{01: Compare the 15 high bits (A15−A1) of address bus with the base address}
5, 4
register P43AH, P43AL.
P43CMP0
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
register P43AH, P43AL.
3, 2
P42FUN1 _{The P4.2 function control bits which are the similar definition as P43FUN1,}
P42FUN0 ^P43FUN0.
1, 0
P42CMP1 _{The P4.2 address comparator length control bits which are the similar definition}
P42CMP0 ^{as P43CMP1, P43CMP0.}
P4CONA (C2H)
BIT
NAME
FUNCTION
7, 6
P41FUN1 _{The P4.1 function control bits which are the similar definition as P43FUN1,}
P41FUN0 ^P43FUN0.
5, 4
P41CMP1 _{The P4.1 address comparator length control bits which are the similar definition}
P41CMP0 ^{as P43CMP1, P43CMP0.}
3, 2
P40FUN1 _{The P4.0 function control bits which are the similar definition as P43FUN1,}
P40FUN0 ^P43FUN0.
1, 0
P40CMP1 _{The P4.0 address comparator length control bits which are the similar definition}
P40CMP0 ^{as P43CMP1, P43CMP0.}
Publication Release Date: December 4, 2006
-9-
Revision A6