NEC V850E/MA1 User Manual page 490

14.3.11 Port CS
Port CS is an 8-bit I/O port that can be set to the input or output mode in 1-bit units.
7 6
PCS PCS7 PCS6
Bit position Bit name
7 to 0
PCSn
(n = 7 to 0)
In addition to their function as port pins, in the control mode, the port pins can also operate as the chip select signal
outputs when memory is externally expanded, the row address strobe signal outputs to DRAM, and the read/write
strobe signal output to an external I/O.
(1) Operation in control mode
Port
Port CS PCS0 CS0
PCS1 CS1/RAS1
PCS2 CS2/IOWR
PCS3 CS3/RAS3
PCS4 CS4/RAS4
PCS5 CS5/IORD
PCS6 CS6/RAS6
PCS7 CS7
490
CHAPTER 14 PORT FUNCTIONS
5 4 3
PCS5 PCS4 PCS3
Port CS
I/O port
Alternate Function Pin Name
User's Manual U14359EJ4V0UM
2 1 0
PCS2 PCS1 PCS0
Function
Remark
Chip select signal output
Chip select signal output/
row address signal output
Chip select signal output/
write strobe signal output
Chip select signal output/
row address signal output
Chip select signal output/
read strobe signal output
Chip select signal output/
row address signal output
Chip select signal output
Address After reset
FFFFF008H Undefined
Block Type
J
K
J
K
J