HD64336900G Datasheet, PDF (96/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

5.2.2 RC Trimming Data Protect Register (RCTRMDPR)
RCTRMDPR controls RCTRMDPR itself and writing to RCTRMDR. Use the MOV instruction to
rewrite this register. Bit manipulation instruction cannot change the settings.
Initial
Bit
Bit Name Value R/W Description
7
WRI
1
W
Write Inhibit
Only when writing 0 to this bit, this register can be written
to. This bit is always read as 1.
6
PRWE
0
R/W Protect Information Write Enable
Bits 5 and 4 can be written to when this bit is set to 1.
[Setting condition]
• When writing 0 to the WRI bit and writing 1 to the
PRWE bit
[Clearing conditions]
• Reset
• When writing 0 to the WRI bit and writing 0 to the
PRWE bit
5
LOCKDW 0
R/W Trimming Data Register Lock Down
The RC trimming data register (RCTRMDR) cannot be
written to when this bit is set to 1. Once this bit is set to 1,
this register cannot be written to until a reset is input even
if 0 is written to this bit.
[Setting condition]
When writing 0 to the WRI bit and writing 1 to the
LOCKDW bit while the PRWE bit is 1
[Clearing condition]
Reset
4
TRMDRWE 0
R/W Trimming Date Register Write Enable
This register can be written to when the LOCKDW bit is 0
and this bit is 1.
[Setting condition]
• When writing 0 to the WRI bit while writing 1 to the
LOCKDW bit while the PRWE bit is 1
[Clearing conditions]
• Reset
• When writing 0 to the WRI bit and writing 0 to the
LOCKDW bit while the PRWE bit is 1
Rev. 1.00, 11/03, page 68 of 376