M16C80 Datasheet, PDF (174/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
20. UARTi Special Mode Register (i = 2 to 4)
UARTi special mode register 3 (i=3,4)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U3SMR3
U4SMR3
Address
032516
02F516
When reset
000000002
000000002
Bit symbol
SSE
CKPH
DINC
NODC
Bit name
Function
SS port function enable bit 0: SS function disable
(Note 3) 1: SS function enable
Clock phase set bit
0: Without clock delay
1: With clock delay
Serial input port set bit
0: Select TxDi and RxDi
(master mode) (Note 5)
1: Select STxDi and SRxDi
(slave mode) (Note 6)
Clock output select bit
0: CLKi is CMOS output
1: CLKi is N-channel open drain
output
RW
ERR
DL0
DL1
Fault error flag
SDAi(TxD2) digital
delay time set bit
(Note 1,2)
DL2
0: Without fault error
1: With fault error
b7 b6 b5
000 :Without delay
001 :1 to 2 cycles of 1/f(XIN)
010 :2 to 3 cycles of 1/f(XIN)
011 :3 to 4 cycles of 1/f(XIN)
100 :4 to 5 cycles of 1/f(XIN)
101 :5 to 6 cycles of 1/f(XIN)
110 :6 to 7 cycles of 1/f(XIN)
111 :7 to 8 cycles of 1/f(XIN)
(Note 4)
Note 1: These bits are used for SDAi(TxDi) output digital delay when using UARTi for IIC interface.
Otherwise, must set to "000".
Note 2: When external clock is selected, delay is increased approx. 100ns.
Note 3: Set SS function after setting CTS/RTS disable bit (bit 4 of UARTi transfer/receive control
register 0) to "1".
Note 4: Nothing but "0" may be written.
Note 5: Set CLKi and TxDi both for output using the CLKi and TxDi function select register A. Set the
RxDi function select register A for input/output port and the port direction register to "0".
Note 6: Set STxDi for output using the STxDi function select registers A and B. Set the CLKi and
SRxDi function select register A for input/output port and the port direction register to "0".
Figure 20.6 UARTi special mode register 3 (i=3,4)
Rev.1.00 Aug. 02, 2005 ^{Page 163} of 329
REJ09B0187-0100