TMP86FS49AIUG datasheet(176/296 Pages) TOSHIBA

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Page 160

14. Synchronous Serial Interface (SIO1)

14.2 Control

TMP86FS49AIUG

14.2 Control

The SIO is controlled using the serial interface control register (SIO1CR). The operating status of the serial inter-

face can be inspected by reading the status register (SIO1CR).

Note 1: When SIO1CR<SIOINH> is set to “1”, SIO1CR<SIOS>, SIO1SR register, SIO1RDB register and SIO1TDB register are

initialized.

Note 2: Transfer mode, direction of transfer and serial clock must be select during the transfer is stopping (when SIO1SR<SIOF>

"0").

Note 3: fc: High-frequency clock [Hz], fs: Low-frequency clock [Hz], *: Don’t care

Serial Interface Control Register

SIO1CR

(0020H)

765

SIOS

SIOINH

SIOM

SIODIR

SCK

(Initial value: 0000 0000)

SIOS

Specify start/stop of transfer

0: Stop

1: Start

R/W

SIOINH

Forcibly stops transfer (Note 1)

0: –

1: Forcibly stop (Automatically cleared to "0" after stopping)

SIOM

Selects transfer mode

00: Transmit mode

01: Receive mode

10: Transmit/receive mode

11: Reserved

SIODIR

Selects direction of transfer

0: MSB (Transfer beginning with bit7)

1: LSB (Transfer beginning with bit0)

SCK

Selects serial clock

NORMAL1/2 or IDLE1/2 modes

SLOW/SLEEP

mode

TBTCR

<DV7CK> = "0"

TBTCR

<DV7CK> = "1"

000

fc/212

fs/24

001

fc/28

Reserved

010

fc/27

Reserved

011

fc/26

Reserved

100

fc/25

Reserved

101

fc/24

Reserved

110

fc/23

Reserved

111

External clock (Input from SCK1 pin)

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