M306V2EEFS datasheet(108/271 Pages) RENESAS

108 / 271 page

Rev.1.40

Oct 06, 2004 page 108 of 269

M306V2ME-XXXFP, M306V2EEFP

Function

(During clock synchronous

serial I/O mode)

UART transmit/receive control register 2

Symbol

Address

When reset

UCON

03B016

X00000002

b7b6b5b4b3b2b1b0

Bit name

Bit

symbol

Function

(During UART mode)

UART0 transmit

interrupt cause select bit

Reserved bit

0 : Transmit buffer empty (Tl = 1)

1 : Transmission completed

(TXEPT = 1)

0 : Transmit buffer empty (Tl = 1)

1 : Transmission completed

(TXEPT = 1)

U0IRS

Must always be set to “0”

UART0 continuous

receive mode select bit

0 : Continuous receive mode

disabled

0 : Continuous receive mode

enable

U0RRM

Invalid

Reserved bits

Must always be set to “0”

Nothing is assigned.

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

Figure 2.11.14 UART2 special mode register

UART2 special mode register

Symbol

Address

When reset

U2SMR

037716

0016

Bit name

Bit

symbol

Function

(During UART mode)

Function

(During clock synchronous

serial I/O mode)

Reserved bits

ACSE

SSS

0 : Ordinary

1 : Falling edge of RxD2

Transmit start condition

select bit

Auto clear function

select bit of transmit

enable bit

0 : No auto clear function

1 : Auto clear at occurrence of

bus collision

Must always be set to “0”

Reserved bit

Must always be set to “0”

000

Must always be set to “0”

Figure 2.11.13 UART transmit/receive control register 2

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