M30620FCAFP datasheet(374/615 Pages) RENESAS

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Clock-Synchronous Serial I/O

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

2-57

Figure 2.4.4. Serial I/O-related registers (3)

UARTi transmit/receive control register 0

Symbol

Address

When reset

UiC0(i=0,1)

03A416, 03AC16

0816

Function

(During UART mode)

Function

(During clock synchronous

serial I/O mode)

TXEPT

CLK1

CLK0

CRS

CRD

NCH

CKPOL

BRG count source

select bit

Transmit register empty

flag

0 : Transmit data is output at

falling edge of transfer clock

and receive data is input at

rising edge

1 : Transmit data is output at

rising edge of transfer clock

and receive data is input at

falling edge

CLK polarity select bit

CTS/RTS function

select bit

CTS/RTS disable bit

Data output select bit

0 0 : f1 is selected

0 1 : f8 is selected

1 0 : f32 is selected

1 1 : Must not be set.

b1 b0

0 : LSB first

1 : MSB first

0 : Data present in transmit

1 : No data present in transmit

completed)

0 : CTS/RTS function enabled

1 : CTS/RTS function disabled

(P60 and P64 function as

programmable I/O port)

0 : TXDi pin is CMOS output

1 : TXDi pin is N-channel

open-drain output

UFORM Transfer format select bit

0 0 : f1 is selected

0 1 : f8 is selected

1 0 : f32 is selected

1 1 : Must not be set.

b1 b0

Valid when bit 4 = “0”

0 : CTS function is selected (Note 1)

1 : RTS function is selected (Note 2)

Valid when bit 4 = “0”

0 : CTS function is selected (Note 1)

1 : RTS function is selected (Note 2)

0 : Data present in transmit register

(during transmission)

1 : No data present in transmit

0: TXDi pin is CMOS output

1: TXDi pin is N-channel

open-drain output

Must always be “0”

Bit name

Bit

symbol

Must always be “0”

Note 1: Set the corresponding port direction register to “0”.

Note 2: The settings of the corresponding port register and port direction register are invalid.

0 : CTS/RTS function enabled

1 : CTS/RTS function disabled

(P60 and P64 function as

programmable I/O port)

UART2 transmit/receive control register 0

Symbol

Address

When reset

U2C0

037C16

0816

Function

(During UART mode)

Function

(During clock synchronous

serial I/O mode)

TXEPT

CLK1

CLK0

CRS

CRD

CKPOL

BRG count source

select bit

Transmit register empty

flag

0 : Transmit data is output at

falling edge of transfer clock

and receive data is input at

rising edge

1 : Transmit data is output at

rising edge of transfer clock

and receive data is input at

falling edge

CLK polarity select bit

CTS/RTS function

select bit

CTS/RTS disable bit

0 0 : f1 is selected

0 1 : f8 is selected

1 0 : f32 is selected

1 1 : Must not be set.

b1 b0

0 : LSB first

1 : MSB first

0 : Data present in transmit

1 : No data present in transmit

completed)

0 : CTS/RTS function enabled

1 : CTS/RTS function disabled

(P73 functions

programmable I/O port)

0 : TXDi pin is CMOS output

1 : TXDi pin is N-channel

open-drain output

UFORM Transfer format select bit

(Note 3)

0 0 : f1 is selected

0 1 : f8 is selected

1 0 : f32 is selected

1 1 : Must not be set.

b1 b0

Valid when bit 4 = “0”

0 : CTS function is selected (Note 1)

1 : RTS function is selected (Note 2)

Valid when bit 4 = “0”

0 : CTS function is selected (Note 1)

1 : RTS function is selected (Note 2)

0 : Data present in transmit register

(during transmission)

1 : No data present in transmit

0: TXDi pin is CMOS output

1: TXDi pin is N-channel

open-drain output

Must always be “0”

Bit name

Bit

symbol

Note 1: Set the corresponding port direction register to “0”.

Note 2: The settings of the corresponding port register and port direction register are invalid.

Note 3: Only clock synchronous serial I/O mode and 8-bit UART mode are valid.

0 : CTS/RTS function enabled

1 : CTS/RTS function disabled

(P73 functions programmable

I/O port)

Nothing is assigned.

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

0 : LSB first

1 : MSB first

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