M16C80 Datasheet, PDF (147/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
16. Serial I/O
UART2 special mode register 3
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U2SMR3
Address
033516
When reset
000XXXXX2
Bit symbol
Bit name
Function
RW
Nothing is assigned. These bits can neither be set nor reset. When read,
their contents are indeterminate.
SDA2(TxD2) digital
b7 b6 b5
DL0
delay time set bit
000:Without delay
(Note 1,2)
001:1 to 2 cycles of 1/f(XIN)
010:2 to 3 cycles of 1/f(XIN)
DL1
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)
DL2
110:6 to 7 cycles of 1/f(XIN)
111:7 to 8 cycles of 1/f(XIN)
Note 1: These bits are used for SDA2(TxD2) output digital delay when using UART2 for IIC interface.
Otherwise, must set to "000".
Note 2: When external clock is selected, delay is increased approx. 100ns.
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
Bit name
Function
SS port function enable bit 0: SS function disable
(Note 3) 1: SS function enable
RW
CKPH
Clock phase set bit
0: Without clock delay
1: With clock delay
DINC
Serial input port set bit
0: Select TxDi and RxDi
(master mode) (Note 5)
1: Select STxDi and SRxDi
(slave mode) (Note 6)
NODC Clock output select bit
0: CLKi is CMOS output
1: CLKi is N-channel open drain
output
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 16.12 Serial I/O-related registers (8)
Rev.1.00 Aug. 02, 2005 ^{Page 136} of 329
REJ09B0187-0100