M16CSLASH26 datasheet(121/239 Pages) RENESAS

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Renesas Technology Corp.

Serial I/O

115

M16C/26 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Under

development

Preliminary Specifications Rev. 0.9

Specifications in this manual are tentative and subject to change.

UARTi transmit/receive control register 1 (i=0, 1)

Symbol

Address

When reset

UiC1(i=0,1)

03A516,03AD16

0216

Bit name

Bit

symbol

Function

(During UART mode)

Function

(During clock synchronous

serial I/O mode)

Transmit enable bit

Receive enable bit

Receive complete flag

Transmit buffer

empty flag

0 : Transmission disabled

1 : Transmission enabled

0 : Data present in

transmit buffer register

1 : No data present in

transmit buffer register

0 : Reception disabled

1 : Reception enabled

0 : Transmission disabled

1 : Transmission enabled

0 : Data present in

transmit buffer register

1 : No data present in

transmit buffer register

0 : Reception disabled

1 : Reception enabled

0 : No data present in

receive buffer register

1 : Data present in

receive buffer register

0 : No data present in

receive buffer register

1 : Data present in

receive buffer register

Nothing is assigned.

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

UART2 transmit/receive control register 1

Symbol

Address

When reset

U2C1

037D16

0216

Bit name

Bit

symbol

Function

(During UART mode)

Function

(During clock synchronous

serial I/O mode)

Transmit enable bit

Receive enable bit

Receive complete flag

Transmit buffer

empty flag

0 : Transmission disabled

1 : Transmission enabled

0 : Data present in

transmit buffer register

1 : No data present in

transmit buffer register

0 : Reception disabled

1 : Reception enabled

0 : Transmission disabled

1 : Transmission enabled

0 : Data present in

transmit buffer register

1 : No data present in

transmit buffer register

0 : Reception disabled

1 : Reception enabled

0 : No data present in

receive buffer register

1 : Data present in

receive buffer register

0 : No data present in

receive buffer register

1 : Data present in

receive buffer register

U2IRS UART2 transmit interrupt

cause select bit

0 : Transmit buffer empty

(TI = 1)

1 : Transmit is completed

(TXEPT = 1)

0 : Transmit buffer empty

(TI = 1)

1 : Transmit is completed

(TXEPT = 1)

U2RRM UART2 continuous

receive mode enable bit

0 : Continuous receive

mode disabled

1 : Continuous receive

mode enabled

Must always be "0"

Data logic select bit

0 : No reverse

1 : Reverse

0 : No reverse

1 : Reverse

U2LCH

U2ERE Error signal output

enable bit

Must be fixed to 0

0 : Output disabled

1 : Output enabled

Figure 1.15.7. Serial I/O-related registers (4)

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