Wait Control Register (Wcr) - Hitachi H8/3022 Hardware Manual

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.
Bit
Initial value
Read/Write
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: These bits cannot be modified and are always read as 1.
Bits 3 and 2—Wait Mode Select 1 and 0 (WMS1/0): These bits select the wait mode.
Bit3 Bit2
WMS1 WMS0
0 0
1
1 0
1
7 6
— —
1 1
— —
Reserved bits
Description
Programmable wait mode
No wait states inserted by wait-state controller
Pin wait mode 1
Pin auto-wait mode
5 4
— — WMS1
1 1
— — R/W
Wait mode select 1/0
These bits select the wait mode
3 2
WMS0 WC1
0 0
R/W R/W
Wait count 1/0
These bits select the
number of wait states
inserted
1 0
WC0
1 1
R/W
(Initial value)
109