CHAPTER 12 PORT FUNCTIONS
User’s Manual U12688EJ4V0UM00
390
(c) Port/control select register 8 (PCS8)
This register can be read/written in 8- or 1-bit units. However, all the bits except for bits 5 and 4 are fixed
at 0, so even if 1 is written, it is disregarded.
0
0
Address
FFFFF590H
After reset
00H
1
0
2
0
3
0
4
PCS84
5
PCS85
6
0
7
0
PCS8
Bit Position
Bit Name
Function
5
PCS85
Port Control Select
Specifies the operating mode when pin P85 is in the control mode.
0: CS5/RAS5 output mode
1: IORD output mode
4
PCS84
Port Control Select
Specifies the operating mode when pin P84 is in the control mode.
0: CS4/RAS4 output mode
1: IOWR output mode
Caution When the port mode is specified by the PMC8 register, the settings of this register are ignored.
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