M16C30P_07 Datasheet, PDF (283/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
22. Usage Precaution
22. Usage Precaution
22.1 SFR
22.1.1 Register Settings
Table 22.1 Registers with Write-only Bits which can only be written to. Set these registers with immediate
values. When establishing the next value by altering the present value, write the present value to the RAM as
well as to the register. Transfer the next value to the register after making changes in the RAM.
Table 22.1 Registers with Write-only Bits
Register
Watchdog timer start register
UART0 bit rateregister
Symbol
WDC
U0BRG
Address
000E
03A1
UART1 bit rateregister
UART2 bit rate register
UART0 Transmit buffer register
UART1 Transmit buffer register
UART2 Transmit buffer register
Ups and downs flag
Timer 0 register
Timer 1 register
Timer 2 register
U1BRG
U2BRG
U0TB
U1TB
U2TB
UDF
TA0
TA1
TA2
03A9
0379
03A3 to 03A2
03AB to 03AA
037B to 037A
0384
0387 to 0386
0389 to 0388
038B to 038A
Rev.1.22 Mar 29, 2007 Page 267 of 291
REJ09B0179-0122