HD643303x Hitachi, HD643303x Datasheet - Page 120

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HD643303x

Manufacturer Part Number
HD643303x
Description
Hitachi Microcomputer
Manufacturer
Hitachi
Datasheet
6.2.2 Wait Control Register (WCR)
WCR is an 8-bit readable/writable register that selects the wait mode for the wait-state controller
(WSC) and specifies the number of wait states.
WCR is initialized to H'F3 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bits 7 to 4—Reserved: Read-only bits, always read as 1.
Bits 3 and 2—Wait Mode Select 1 and 0 (WMS1/0): These bits select the wait mode.
Bit 3
WMS1
0
1
Bit
Initial value
Read/Write
WMS0
0
1
0
1
Bit 2
Description
Programmable wait mode
No wait states inserted by wait-state controller
Pin wait mode 1
Pin auto-wait mode
7
1
Reserved bits
6
1
5
1
105
4
1
Wait mode select 1/0
These bits select the wait mode
WMS1
R/W
3
0
WMS2
R/W
2
0
Wait count 1/0
These bits select the
number of wait states
inserted
WC1
R/W
1
1
(Initial value)
WC0
R/W
0
1

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