R8CSLASH13 datasheet(122/224 Pages) RENESAS

122 / 224 page

Rev.1.20

Jan 27, 2006

page 111 of 205

REJ09B0111-0120

R8C/13 Group

13. Serial Interface

Figure 13.3 U0TB and U1TB Registers, U0RB and U1RB Registers, and U0BRG and U1BRG Registers

(b15)

SymbolAddressAfter reset

U0RB00A716-00A616

Indeterminate

U1RB00AF16-00AE16

Indeterminate

(b8)

UARTi receive buffer register (i=0, 1)

Function

Bit name

Bit

symbol

0 : No framing error

1 : Framing error found

0 : No parity error

1 : Parity error found

0 : No error

1 : Error found

NOTES:

1. Read the UiRB register in 16-bit unit.

2. All of the SUM, PER, FER and OER bits are set to “0” (no error) when the SMD2 to SMD0 bits in the UiMR register are set to “0002” (serial I/O

disabled) or the RE bit in the UiC1 register is set to “0” (reception disabled). The SUM bit is set to “0” (no error) when all of the PER, FER and OER

bits are set to “0” (no error).

The PER and FER bits are set to “0” even when the higher byte of the UiRB register is read.

OER

FER

PER

SUM

Overrun error flag(2)

Framing error flag(2)

Parity error flag(2)

Error sum flag(2)

0 : No overrun error

1 : Overrun error found

Receive data (D7 to D0)

UARTi bit rate register

(i=0, 1)

SymbolAddressAfter reset

U0BRG00A116

Indeterminate

U1BRG00A916

Indeterminate

Function

Assuming that set value = n, UiBRG divides the count source

by n + 1

0016 to FF16

Setting range

NOTES:

1. Write to this register while serial interface is neither transmitting nor receiving.

2. Use MOV instruction to write to this register.

3. After setting the CLK0 to CLK1 bits of the UiC0 register, write to the UiBRG register.

(b8)

UARTi transmit buffer register

(i=0, 1)

Function

Transmit data

Nothing is assigned.

When write, set to “0”. When read, its content is indeterminate.

Symbol

Address

After reset

U0TB

00A316-00A216

Indeterminate

U1TB

00AB16-00AA16

Indeterminate

NOTES:

1. When transfer data length is 9-bit long, write high-byte first then low-byte.

2. Use MOV instruction to write to this register.

(b7-b0)

(b11-b9)

Receive data (D8)

(b8)

Nothing is assigned.

When write, set to “0”. When read, its content is indeterminate.

Bit

symbol

(b8-b0)

(b15-b9)

(1, 2)

(1)

(1, 2, 3)

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