M16CSLASH29 datasheet(199/499 Pages) RENESAS

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14. Serial I/O

page 175

Figure 14.5 U0MR to U2MR Registers

UARTi Transmit/receive Mode Register (i=0, 1)

b7 b6 b5 b4 b3 b2 b1 b0

Bit Name

Bit

Symbol

CKDIR

SMD1

SMD0 Serial I/O mode select bit

(2)

SMD2

Internal/external clock

select bit

STPS

PRY

PRYE

(b7)

Parity enable bit

0 : Internal clock

1 : External clock (1)

Stop bit length select bit

Odd/even parity select bit

Reserve bit

0 : One stop bit

1 : Two stop bits

0 : Parity disabled

1 : Parity enabled

b2 b1 b0

Effective when PRYE = 1

0 : Odd parity

1 : Even parity

Set to 0

Function

UART2 Transmit/receive Mode Register

b7 b6 b5 b4 b3 b2 b1 b0

Bit Name

Bit

Symbol

CKDIR

SMD1

SMD0 Serial I/O mode select bit

(2)

SMD2

Internal/external clock

select bit

STPS

PRY

PRYE

IOPOL

Parity enable bit

0 : Internal clock

1 : External clock (1)

Stop bit length select bit

Odd/even parity select bit

TxD, RxD I/O polarity

reverse bit

0 : One stop bit

1 : Two stop bits

0 : Parity disabled

1 : Parity enabled

b2 b1 b0

Effective when PRYE = 1

0 : Odd parity

1 : Even parity

0 : No reverse

1 : Reverse

Function

Symbol Address

After Reset

U2MR

037816

0016

NOTES:

1. Set the corresponding port direction bit for each CLKi pin to 0 (input mode).

2. To receive data, set the corresponding port direction bit for each RxDi pin to 0.

Symbol

Address

After Reset

U0MR, U1MR

03A016, 03A816

0016

NOTES:

1. Set the corresponding port direction bit for each CLK2 pin to 0 (input mode).

2. To receive data, set the corresponding port direction bit for each RxD2 pin to 0 (input mode).

3. Set the corresponding port direction bit for SCL2 and SDA2 pins to 0 (input mode).

0 0 0 : Serial I/O disabled

0 0 1 : Clock synchronous serial I/O mode

0 1 0 : I2C bus mode(3)

1 0 0 : UART mode transfer data 7 bit long

1 0 1 : UART mode transfer data 8 bit long

1 1 0 : UART mode transfer data 9 bits long

Do not set the value other than the above

0 0 0 : Serial I/O disabled

0 0 1 : Clock synchronous serial I/O mode

1 0 0 : UART mode transfer data 7 bit long

1 0 1 : UART mode transfer data 8 bit long

1 1 0 : UART mode transfer data 9 bit long

Do not set the value other than the above

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