HD64336901G Renesas Technology, HD64336901G Datasheet - Page 96

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

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