
Preliminary W78LE516
Publication Release Date: June 2000
- 9 -
Revision A1
P4CONB (C3H), continued
BIT
5, 4
NAME
P43CMP1
P43CMP0
FUNCTION
Chip-select signals address comparison:
00: Compare the full address (16 bits length) with the base address register
P43AH, P43AL.
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
register P43AH, P43AL.
The P4.2 function control bits which are the similar definition as P43FUN1,
P43FUN0.
3, 2
P42FUN1
P42FUN0
P42CMP1
P42CMP0
1, 0
The P4.2 address comparator length control bits which are the similar
definition as P43CMP1, P43CMP0.
P4CONA (C2H)
BIT
7, 6
NAME
P41FUN1
P41FUN0
P41CMP1
P41CMP0
P40FUN1
P40FUN0
P40CMP1
P40CMP0
FUNCTION
The P4.1 function control bits which are the similar definition as P43FUN1,
P43FUN0.
5, 4
The P4.1 address comparator length control bits which are the similar
definition as P43CMP1, P43CMP0.
3, 2
The P4.0 function control bits which are the similar definition as P43FUN1,
P43FUN0.
1, 0
The P4.0 address comparator length control bits which are the similar
definition as P43CMP1, P43CMP0.
P2ECON (AEH)
BIT
7
NAME
P43CSINV The active polarity of P4.3 when pin P4.3 is defined as read and/or write
strobe signal.
= 1 : P4.3 is active high when pin P4.3 is defined as read and/or write strobe
signal.
= 0 : P4.3 is active low when pin P4.3 is defined as read and/or write strobe
signal.
P42CSINV The similarity definition as P43SINV.
P41CSINV The similarity definition as P43SINV.
FUNCTION
6
5