TMP93CS44 datasheet(164/224 Pages) TOSHIBA

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TMP93CS44/S45

2004-02-10

93CS44-162

2. When <MST> is “0” (Slave mode)

In the slave mode, the TMP93CS44/S45 operates either in normal slave mode or

in recovery process after a noise detection.

In the slave mode, an INTS2 interrupt request occurs when the serial bus

interface circuit receives a slave address or a GENERAL CALL from the master

device, or when a GENERAL CALL is received and data transfer is complete after

matching a received slave address. In the master mode, the TMP93CS44/S45

operates in a slave mode if a noise is detected. An INTS2 interrupt request occurs

when word data transfer terminates after a noise detection. When an INTS2

interrupt request occurs, the SBISR<PIN> is reset, and the SCL pin is set to low

level. Either reading or writing from or to the SBIDBR or setting the <PIN> to 1

releases the SCL pin after taking tLOW time.

The TMP93CS44/S45 tests the SBISR<AL>, the SBISR<TRX>, the <AAS>, and

the <AD0> and implements processes according to conditions listed in the next

table.

Table 3.10.1 Operation in the Slave Mode

<TRX>

<AL>

Conditions

Process

In the slave receiver mode, the

TMP93CS44/S45 receives a slave

address of which the direction bit sent

from the master is “1”.

Set the number of bits in 1 word to <BC2:0>

and write transmitted data to the SBIDBR.

In the slave transmitter mode, 1-word

data is transmitted.

Check <LRB>. If <LRB> is set to “1”, set <PIN>

to “1” since the receiver does not request next

data. Then, clear <TRX> to “0” release the

bus. If <LRB> is set to “0”, set the number of

bits in a word to <BC2:0> and write transmitted

data to the SBIDBR since the receiver

requests next data.

1/0

In the slave receiver mode, the

TMP93CS44/S45 receives a slave

address or GENERAL CALL of which

the direction bit sent from the master is

“0”.

Read the SBIDBR for setting <PIN> to “1”

(Reading dummy data) or write “1” to <PIN>.

1/0

In the slave receiver mode, the

TMP93CS44/S45 terminates receiving

of 1-word data.

Set the number of bits in a word to <BC2:0>

and read received data from the SBIDBR.

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