SH7261 datasheet(709/1348 Pages) RENESAS

709 / 1348 page

Section 16 Serial Communication Interface with FIFO (SCIF)

Rev. 2.00 Sep. 07, 2007 Page 677 of 1312

REJ09B0320-0200

16.3.5

Serial Mode Register (SCSMR)

SCSMR specifies the SCIF serial communication format and selects the clock source for the baud

rate generator.

The CPU can always read and write to SCSMR. SCSMR is initialized to H'0000 by a power-on

reset or in deep standby mode.

0000000000000000

RRRRRRRR

R/W

Bit:

Initial value:

R/W:

————————

A CHR

E STOP

—

CKS[1:0]

Bit

Bit Name

Initial

Value

R/W

Description

15 to 8



All 0

Reserved

These bits are always read as 0. The write value should

always be 0.

R/W

Communication Mode

Selects whether the SCIF operates in asynchronous or

clocked synchronous mode.

0: Asynchronous mode

1: Clocked synchronous mode

CHR

R/W

Character Length

Selects 7-bit or 8-bit data length in asynchronous mode.

In the clocked synchronous mode, the data length is

always 8 bits, regardless of the CHR setting.

0: 8-bit data

1: 7-bit data*

Note: *

When 7-bit data is selected, the MSB (bit 7)

of the transmit FIFO data register is not

transmitted.

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