![](http://datasheet.mmic.net.cn/30000/M306NAMCV-XXXFP_datasheet_2359297/M306NAMCV-XXXFP_29.png)
Bus Control
Mitsubishi microcomputers
M16C / 6N0 / 6N1 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
29
W
Function
Bit symbol
Bit name
Chip select control register
Symbol
Address
When reset
CSR
000816
0116
R
b7
b6
b5
b4
b3
b2
b1
b0
CS1
CS0
CS3
CS2
CS0 output enable bit
CS1 output enable bit
CS2 output enable bit
CS3 output enable bit
CS1W
CS0W
CS3W
CS2W
CS0 wait bit
CS1 wait bit
CS2 wait bit
CS3 wait bit
0 : Chip select output disabled
(Normal port pin)
1 : Chip select output enabled
0 : Wait state inserted
1 : No wait state
Figure 1.9.1. Chip select control register
The timing of the chip select signal changing to "L" (active) is synchronized with the address bus. But the
timing of the chip select signal changing to "H" depends on the area which will be accessed in the next
cycle. Figure 1.9.2 shows the output example of the address bus and chip select signal.