M32C8A Datasheet, PDF (217/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
17. Serial Interfaces
UARTi Special Mode Register 2 (i = 0 to 4)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U0SMR2 to U2SMR2
U3SMR2, U4SMR2
Address
0366h, 02E6h, 0336h
0326h, 02F6h
After Reset
00h
00h
Bit Symbol
Bit Name
Function
RW
IICM2
I²C mode select bit 2
0: ACK/NACK interrupt used
1: Transmit/receive interrupt used
RW
CSC
Clock synchronous bit⁽¹⁾
0: Not clock synchronized
1: Clock synchronized
RW
SWC
SCL wait output bit⁽²⁾
0: No wait state/release wait states
1:SCLi pin is held "L" after receiving 8th bit.
RW
When arbitration lost is detected,
ALS
SDA output auto stop bit⁽¹⁾
0: SDAi output not stopped
RW
1: SDAi output stopped
When start condition is detected,
STC
UARTi auto initialization bit⁽²⁾
0: UARTi not initialized
RW
1: UARTi initialized
SWC2
SCL wait output bit 2⁽¹⁾
0: Serial clock output from SCLi pin
1: SCLi pin is held "L"
RW
SDHI
SDA output stop bit⁽²⁾
0: Output data
1: Output stopped (Hi-impedance state)
RW
SU1HIM
External clock synchronous
enable bit⁽³⁾
0: Not synchronized with external clock
1: Synchronized with external clock
RW
NOTES:
1. These bits are used when the MCU is in master mode in I ²C mode.
2. These bits are used when the MCU is in slave mode in I ²C mode.
3. The external clock synchronous function can be selected with the combination of the SU1HIM bit and the SCLKDIV bit in the
UiSMR register. The SU1HIM bit is used in GCI mode.
SCLKDIV Bit in the
UiSMR register
0
0
1
SU1HIM Bit in the
UiSMR2 register
0
1
0 or 1
External Clock Synchronous Function Select
Not synchronized
Same frequency as external clock
External clock divided by 2
Figure 17.4 U0SMR2 to U4SMR2 Registers
Rev.1.00 Jul 15, 2007 Page 200 of 352
REJ09B0385-0100