M32CSLASH8B datasheet(217/406 Pages) RENESAS

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Under development

M32C/8B Group

17. Serial Interfaces

Preliminary specification

Specifications in this manual are tentative and subject to change.

REJ09B0450-0050 Rev.0.50 Oct 31, 2008

Page 200 of 385

Figure 17.4

U0SMR2 to U4SMR2 Registers

b7 b6 b5 b4

Symbol

U0SMR2 to U2SMR2

U3SMR2, U4SMR2

Address

0366h, 02E6h, 0336h

0326h, 02F6h

After Reset

00h

Function

Bit Symbol

Bit Name

SWC

CSC

IICM2

SWC2

SDHI

When arbitration lost is detected,

0: SDAi output not stopped

1: SDAi output stopped

SDA output auto stop bit(1)

SDA output stop bit(2)

I2C mode select bit 2

STC

ALS

When start condition is detected,

0: UARTi not initialized

1: UARTi initialized

0: Output data

1: Output stopped (Hi-impedance state)

UARTi auto initialization bit(2)

0: Serial clock output from SCLi pin

1: SCLi pin is held "L"

SCL wait output bit 2(1)

External clock synchronous

enable bit(3)

0: Not synchronized with external clock

1: Synchronized with external clock

SU1HIM

UARTi Special Mode Register 2 (i = 0 to 4)

Clock synchronous bit(1)

SCL wait output bit(2)

0: Not clock synchronized

1: Clock synchronized

0: No wait state/release wait states

1:SCLi pin is held "L" after receiving 8th bit.

0: ACK/NACK interrupt used

1: Transmit/receive interrupt used

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

SU1HIM Bit in the

UiSMR2 register

External Clock Synchronous Function Select

Not synchronized

Same frequency as external clock

0 or 1

External clock divided by 2

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