TMP93CS44 datasheet(149/224 Pages) TOSHIBA

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TMP93CS44/S45

2004-02-10

93CS44-147

3.10 Serial Bus Interface (SBI)

The TMP93CS44/S45 has a 1-channel serial bus interface which employs a clocked

synchronous 8-bit serial bus interface and an I2C bus.

The serial bus interface is connected to an external device through P33 (SDA) and P34 (SCL)

in the I2C bus mode; and through P32 (SCK), P33 (SO), and P34 (SI) in the clocked synchronous

8-bit SIO mode.

TMP93CS44/S45 has no an arbitration function which is necessary when two or more master

devices scramble for the bus control. In master mode, other devices which are connected on the

same bus need be slave devices (Single master).

Setting of every pins is as follows.

ODE<ODE34:33>

P3CR<P34C, P33C, P32C> P3FC<P32M, P34F, P33F, P32F>

2C Bus Mode

11X

X110

Clock Synchronous

8-Bit SIO Mode

011

010

1111

X: Don’t care

3.10.1

Configuration

Figure 3.10.1 Serial Bus Interface (SBI)

P32

(SCK/ HWR )

SIO

clock

control

Divider

2C bus

clock

synchronous

Control

SBICR2/

SBISR

SCL

SCK

Input/

output

control

SDA

SBIDBR

SBICR1

SBICR3

Shift

Transfer

control

circuit

Noise

canceller

fc/4

Noise

canceller

2C bus

data control

SIO

data control

INTS2 interrupt request

P33

(SO/SDA)

P34

(SI/SCL)

SBI control

SBI status

2C bus

address

SBI data

buffer

SBI control

I2CAR

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