Wait Control Register (Wcr) - Hitachi H8/3032 Series Hardware Manual

Downloaded from Elcodis.com electronic components distributor

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 7
—
Initial value 1
Read/Write —
Reserved bits
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 Bit 2
WMS1 WMS0 Description
0 0 Programmable wait mode
1 No wait states inserted by wait-state controller
1 0 Pin wait mode 1
1 Pin auto-wait mode
6 5 4 3
— — — WMS1
1
1 1 0
— — — R/W
Wait mode select 1/0
These bits select the wait mode
105
2 1 0
WMS2 WC1 WC0
0 1 1
R/W R/W R/W
Wait count 1/0
These bits select the
number of wait states
inserted
(Initial value)