M30245 datasheet(97/367 Pages) RENESAS

97 / 367 page

Rev.2.00 Oct 16, 2006

page 88 of 354

REJ09B0340-0200

M30245 Group

2. Serial Interface Special Function

Figure 2.5.2. Serial interface special function-related registers (1)

b15

(b7)

(b0)

UARTi transmit buffer register (i= 0 to 3) (Note)

Symbol

Address

When reset

U0TB

03AB16, 03AA16

Indeterminate

U1TB

036B16, 036A16

Indeterminate

U2TB

033B16, 033A16

Indeterminate

U3TB

032B16, 032A16

Indeterminate

Bit Symbol

Function

(clock synchronous serial I/O mode)

Function

(UART mode)

Transmit data

Transmit data (9th bit)

Nothing is assigned. Write “0” when writing to these bits.

The values are indeterminate when read.

Note: Use MOV instruction to write to this register.

ABT

OER

FER

SUM

PER

Note 1: Always write “0”.

Note 2: Bits 15 to 12 are set to “00002” when the serial I/O mode select bit (bits 0 to 2 at

addresses 03A816, 036816, 033816, 032816) are set to “0002” or the receive enable

bit is set to “0”. Bit 15 is set to “0” when all of bits 14 to 12 are set to “0”.

Bits 14 and 13 are also set to “0” when the lower byte of the UARTi receive buffer

Nothing is assigned. Write “0” when writing to these bits.

The values are indeterminate when read.

Arbitration lost

detecting flag (Note 1)

Overrun error flag

(Note 2)

Framing error flag

(Note 2)

Parity error flag

(Note 2)

Error sum flag

(Note 2)

0 : No error

1 : Error

0 : No parity error

1 : Parity error

0 : No framing error

1 : Framing error

0 : No overrun error

1 : Overrun error

Invalid

0 : No overrun error

1 : Overrun error

0 : Not detected

1 : Detected

Receive data

Receive data (9th bit)

b15

(b7)

(b0)

UARTi receive buffer register (i= 0 to 3)

Symbol

Address

When reset

U0RB

03AF16, 03AE16

Indeterminate

U1RB

036F16, 036E16

Indeterminate

U2RB

033F16, 033E16

Indeterminate

U3RB

032F16, 032E16

Indeterminate

Bit Symbol

Function

(clock synchronous

serial I/O mode)

Function

(UART mode)

Bit Name

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