HD64F36034 datasheet(384/592 Pages) RENESAS

384 / 592 page

Section 16 Synchronous Serial Communication Unit (SSU)

Rev. 4.00 Mar. 15, 2006 Page 352 of 556

REJ09B0026-0400

Bit

Bit Name

Initial

Value

R/W

Description

SOL

R/W

Serial Data Output Level Setting

Although the value in the last bit of transmit data is

retained in the serial data output after the end of

transmission, the output level of serial data can be

changed by manipulating this bit before or after

transmission. When the output level is changed, the

SOLP bit should be cleared to 0 and the MOV instruction

should be used. If this bit is written during data transfer,

erroneous operation may occur. Therefore this bit must

not be manipulated during transmission.

0: Shows serial data output level to low in reading.

Changes serial data output level to low in writing

1: Shows serial data output level to high in reading.

Changes serial data output level to high in writing

SOLP

R/W

SOL Write Protect

When output level of serial data is changed, the MOV

instruction is used to set the SOL bit to 1 and clear this bit

to 0 or to clear the SOL bit and this bit to 0.

0: In writing, output level can be changed according to the

value of the SOL bit.

1: In reading, this bit is always read as 1. In writing, it

cannot be modified output level.

SCKS

R/W

SSCK Pin Select

Selects whether the SSCK pin functions as a port or a

serial clock pin.

0: Functions as a port

1: Functions as a serial clock pin

CSS1

CSS0

R/W

SCS Pin Select

Selects whether the

SCS pin functions as a port, an SCS

input, or

SCS output. When the SSUMS bit in SSCRL is

0, the

SCS pin functions as a port regardless of the

setting of this bit.

00: Functions as a port

01: Functions as an

SCS input

1X: Functions as an

SCS output (however, functions as

SCS input before starting transfer)

[Legend]

X: Don't care.

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