NEC UPD703116 User Manual page 707

(b) Port CT mode control register (PMCCT)
This register can be read/written in 8-bit or 1-bit units.
7 6
PMCCT 0 PMCCT6
Note 00H: Single-chip mode 0
53H: Single-chip mode 1, ROMless mode 0 or 1
Bit position Bit name
6 PMCCT6
4 PMCCT4
1 PMCCT1
0 PMCCT0
CHAPTER 14 PORT FUNCTIONS
5 4 3
0 PMCCT4 0
Specifies operation mode of PCT6 pin.
0: I/O port mode
1: ASTB output mode
Specifies operation mode of PCT4 pin.
0: I/O port mode
1: RD output mode
Specifies operation mode of PCT1 pin.
0: I/O port mode
1: UWR output mode
Specifies operation mode of PCT0 pin.
0: I/O port mode
1: LWR output mode
User's Manual U14492EJ5V0UD
2 1 0
0 PMCCT1 PMCCT0 FFFFF04AH
Function
Note
Address Initial value
00H/53H
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