R01UH0092EJ0110 Rev.1.10
Page 139 of 807
Jul 31, 2012
M16C/64C Group
11. Bus
11.2.1
Chip Select Control Register (CSR)
CSiW (
CSi
wait bit) (i = 0 to 3) (b7-b4)
Set the CSiW bit to 0 (wait state) under the following conditions:
•
The
RDY
signal is used in the area indicated by
CSi
.
•
The multiplexed bus is used in the area indicated by
CSi
.
•
The PM17 bit in the PM1 register is 1 (wait state) in memory expansion mode or microprocessor
mode.
When the CSiW bit is 0 (wait state), the number of wait states can be selected using bits CSEi1W to
CSEi0W in the CSE register.
b7 b6 b5 b4
b1
b2
b3
Chip Select Control Register
Symbol
CSR
Address
0008h
Bit Symbol
Bit Name
RW
Reset Value
01h
b0
Function
CS0
RW
0 : Chip select output disabled
(functions as an I/O port)
1 : Chip select output enabled
CS0 output enable bit
CS1
RW
CS1 output enable bit
CS2
RW
CS2 output enable bit
CS3
RW
CS3 output enable bit
CS0W
RW
0 : Wait state
1 : No wait state
CS0 wait bit
CS1W
RW
CS1 wait bit
CS2W
RW
CS2 wait bit
CS3W
RW
CS3 wait bit
Содержание M16C Series
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