External Pin Control Register 1 (Epcr1) - Fujitsu MB91150 Series Hardware Manual

CHAPTER 4 BUS INTERFACE
4.3.8

External Pin Control Register 1 (EPCR1)

This register controls output of address signals.
I External pin control register 1 (EPCR1)
The configuration of External pin control register 1 (EPCR1) is as follows:
EPCR1
Address : 00062A
H
[Bits 7 to 0]: Address output Enable 23 to 16 (AE23 to AE16)
These bits specify whether the corresponding addresses are to be output.
If output is inhibited, the pins can be used as I/O ports.
• 0: Output inhibited
• 1: Output allowed (initial value)
AE23 to AE16 are initialized to FF
112
15 14 13
7 6 5
AE23 AE22 AE21
12 11 10
4 3 2
AE20 AE19 AE18
when the system is reset.
H
Initial value
9 8
- -- -----
Initial value
1 0
AE17 AE16 11111111
Access
W
Access
W