TMP88CS38 datasheet(90/226 Pages) TOSHIBA

90 / 226 page

TMP88CS38/CM38A/CP38A

2007-09-12

88CS38-90

Serial Bus Interface Control Register B

SBICRB

(00023H)

MST

TRX

SBIM

SWRST1SWRST0

(Initial value: 0001 0000)

MST

Master/slave selection

0: Slave

1: Master

TRX

Transmitter/receiver selection

0: Receiver

1: Transmitter

Start/stop generation

0: Generate a stop condition when MST, TRX and PIN are “1”.

1: Generate a start condition when MST, TRX and PIN are “1”.

Cancel interrupt service request

−

1: Cancel interrupt service request

SBIM

Serial bus interface operating

mode selection

00: Port mode (Serial bus interface output disable)

01: Clocked synchronous 8-bit SIO mode

10: I

2C bus mode

11: Reserved

SWRST1

SWRST0

Software reset start bit

Software reset starts by first writing “10” and next writing “01”.

Write

only

Note 1:

Switch a mode to port after confirming that the bus is free.

Note 2:

Switch a mode to I

2C bus mode or clock synchronous 8-bit SIO mode after confirming that the port is high

level.

Note 3:

SBICRB has write-only register and must not be used with any of read-modify-write instructions such as bit

manipulation, etc.

Note 4:

When the SWRST (Bit1, 0 in SBICRB) is written to “01”, “10”, software reset (Four machine cycles) is

occurred.

This time, control the serial bus interface and monitor the operation status registers except the SBIM (Bit3,

2 in SBICRB) and the CHS (Bit6 in PMPXCR) are reseted.

Control the serial bus interface and monitor the operation status registers are SBICRA, SBICRB, SBIDBR,

I2CAR, SBISRA, SBISRB, SCCRA and SCSR.

Serial Bus Interface Status Register A

SBISRA

(00020H)

ACK

SWR

MON

(Initial value: **** ***1)

SWRMON

Software reset monitor

0: During software reset

− (Initial)

Read

only

*: Don’t care

Serial Bus Interface Status Register B

SBISRB

(00023H)

MST

TRX

AAS

AD0

LRB

(Initial value: 0001 0000)

MST

Master/slave selection status

monitor

0: Slave

1: Master

TRX

Transmitter/receiver selection

status monitor

0: Receiver

1: Transmitter

Bus status monitor

0: Bus free

1: Bus busy

Interrupt service requests

status monitor

0: Requesting interrupt service

1: Releasing interrupt service request

Arbitration lost detection

monitor

−

1: Arbitration lost detected

AAS

Slave address match detection

monitor

0: Not detect slave address match or “GENERAL CALL”

1: Detect slave address match or “GENERAL CALL”

AD0

“GENERAL CALL” detection

monitor

0: Not detect “GENERAL CALL”

1: Detect “GENERAL CALL”

LRB

Last Received bit monitor

0: Last receive bit is “0”

1: Last receive bit is “1”

Read

only

Figure 2.9.6 Serial Bus Interface Control Register B and Serial Bus Interface

Status Register A/B in the I

2C Bus Mode

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