CHAPTER 14 PORT FUNCTIONS
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User’s Manual U14492EJ3V0UD
14.3.8 Port CS
Port CS is an 8-bit I/O port in which input or output can be specified in 1-bit units.
7
PCS7
PCS
6
PCS6
5
PCS5
4
PCS4
3
PCS3
2
PCS2
1
PCS1
0
PCS0
Address
FFFFF008H
Initial value
Undefined
Bit Position
Bit Name
Function
7 to 0
PCSn
(n = 7 to 0)
I/O port
Besides functioning as a port, in control mode, this can operate as the chip select signal output when memory is
expanded externally.
(1) Operation in control mode
Port
Alternate Pin Name
Remarks
Block Type
Port CS
PCS7 to
PCS0
CS0 to CS7
Chip select signal output
J
Содержание V850E/IA1 mPD703116
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