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Rev.1.10 Jul 01, 2005 page 171 of 318
REJ09B0124-0110
M16C/6N Group (M16C/6NK, M16C/6NM) 14. Serial I/O
Under development
This document is under development and its contents are subject to change.
Table 14.18 Registers to Be Used and Settings in SIM Mode
Register Bit Function
U2TB
(1)
0 to 7 Set transmission data
U2RB
(1)
0 to 7 Reception data can be read
OER,FER,PER,SUM Error flag
U2BRG 0 to 7 Set a transfer rate
U2MR SMD2 to SMD0 Set to “101b”
CKDIR Select the internal clock or external clock
STPS Set to “0”
PRY Set this bit to “1” for direct format or “0” for inverse format
PRYE Set to “1”
IOPOL Set to “0”
U2C0 CLK1, CLK0 Select the count source for the U2BRG register
CRS Invalid because the CRD bit = 1
TXEPT Transmit register empty flag
CRD Set to “1”
NCH Set to “0”
CKPOL Set to “0”
UFORM Set this bit to “0” for direct format or “1” for inverse format
U2C1 TE Set this bit to “1” to enable transmission
TI Transmit buffer empty flag
RE Set this bit to “1” to enable reception
RI Reception complete flag
U2IRS Set to “1”
U2RRM Set to “0”
U2LCH Set this bit to “0” for direct format or “1” for inverse format
U2ERE Set to “1”
U2SMR
(1)
0 to 3 Set to “0”
U2SMR2 0 to 7 Set to “0”
U2SMR3 0 to 7 Set to “0”
U2SMR4 0 to 7 Set to “0”
NOTE:
1. Not all register bits are described above. Set those bits to “0” when writing to the registers in SIM mode.