M16C80 Datasheet, PDF (233/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
27. Usage Precaution
Setting the registers
The registers shown in Table 27.3 include indeterminate bit when read. Set immidiate to these registers.
Store the content of the frequently used register to RAM, change the content of RAM, then transfer to the
register.
Table 27.3 The object registers
Register name
Symbol
UART4 bit rate generator
U4BRG
UART4 transfer buffer register
U4TB
Dead time timer
DTT
Timer B2 interrupt occurrence frequency set counter
ICTB2
UART3 bit rate generator
U3BRG
UART3 transfer buffer register
U3TB
UART2 bit rate generator
U2BRG
UART2 transfer buffer register
U2TB
Up-down flag
UDF
Timer A0 register (Note)
TA0
Timer A1 register (Note)
TA1
Timer A2 register (Note)
TA2
Timer A3 register (Note)
TA3
Timer A4 register (Note)
TA4
UART0 bit rate generator
U0BRG
UART0 transfer buffer register
U0TB
UART1 bit rate generator
U1BRG
UART1 transfer buffer register
U1TB
Note: In one-shot timer mode and pulse widt modulation mode.
Address
02F916
02FB16, 02FA16
030C16
030D16
032916
032B16, 032A16
033916
033B16, 033A16
034416
034716, 034616
034916, 034816
034B16, 034A16
034D16, 034C16
034F16, 034E16
036116
036316, 036216
036916
036B16, 036A16
External ROM version (144-pin version)
The external ROM version is operated only in microprocessor mode, so be sure to perform the following:
• Connect CNVss pin to Vcc.
Notes on CNVSS pin reset at "H" level
When the CNVSS pin is reset at "H" level, the contents of internal ROM cannot be read out.
Rev.1.00 Aug. 02, 2005 ^{Page 222} of 329
REJ09B0187-0100