Port Cs - NEC UPD703116 User Manual

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 6
PCS PCS7 PCS6
Bit position Bit name
7 to 0 PCSn
(n = 7 to 0)
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
Port CS PCS7 to
PCS0
704
CHAPTER 14 PORT FUNCTIONS
5 4 3
PCS5 PCS4 PCS3
I/O port
Alternate Pin Name
CS0 to CS7 Chip select signal output
User's Manual U14492EJ5V0UD
2 1 0
PCS2 PCS1 PCS0
Function
Remarks
Address Initial value
FFFFF008H Undefined
Block Type
J