M30201 datasheet(77/172 Pages) RENESAS

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Serial I/O

Mitsubishi microcomputers

M30201 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Figure 1.71. Serial I/O-related registers (1)

UARTi bit rate generator (Note 1, 2)

Symbol

Address

When reset

U0BRG

03A116

Indeterminate

U1BRG

03A916

Indeterminate

Function

Assuming that set value = n, BRGi divides the

count source by n + 1

0016 to FF16

Values that can be set

(b15)

(b8)

UARTi transmit buffer register (Note)

Function

Transmit data

Nothing is assigned.

In an attempt to write to these bits, write “0”. The value, if read, turns out to be

indeterminate.

Symbol

Address

When reset

U0TB

03A316, 03A216

Indeterminate

U1TB

03AB16, 03AA16

Indeterminate

(b15)

Symbol

Address

When reset

U0RB

03A716, 03A616

Indeterminate

U1RB

03AF16, 03AE16

Indeterminate

(b8)

UARTi receive buffer register

Function

(During UART mode)

Function (During clock

synchronous serial I/O

mode)

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

Note: Bits 15 through 12 are set to “0” when the receive enable bit is set to “0”. (Bit 15 is set

to “0” when bits 14 to 12 all are set to “0”.) Bits 14 and 13 are also set to “0” when the

lower byte of the UARTi receive buffer register (addresses 03A616, and 03AE16) is

read out.

Invalid

OER

FER

PER

SUM

Overrun error flag

(Note)

Framing error flag

(Note)

Parity error flag

(Note)

Error sum flag

(Note)

0 : No overrun error

1 : Overrun error found

0 : No overrun error

1 : Overrun error found

Nothing is assigned.

In an attempt to write to these bits, write “0”. The value, if read, turns out to

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