TMP93CS44 datasheet(159/224 Pages) TOSHIBA

159 / 224 page

TMP93CS44/S45

2004-02-10

93CS44-157

Figure 3.10.11 Noise Detection Monitor

(11) Slave address match detection monitor

SBISR<AAS> is set to 1 in the slave mode, in the address recognition mode (I2CAR

<ALS>

= 0) when receiving the GENERAL CALL or the slave address with the same

value that is set to the I2CAR. When <ALS> is 1, <AAS> is set to 1 after receiving the

first 1 word of data. <AAS> is set to 0 by writing/reading data to/from a data buffer

(12) GENERAL CALL detection monitor

SBISR<AD0> is set to 1 in the slave mode, when the GENERAL CALL is received

(All 8-bit data are 0 after the start condition). <AD0> is set to 0 when the start or stop

condition is detected on a bus.

(13) Last received bit monitor

The SDA line value stored at the rising edge of the SCL line is sent to SBISR<LRB>.

In the acknowledge mode, immediately after the INTS2 interrupt request is generated,

the acknowledge signal is read by reading the contents of <LRB>.

(14) Software reset function

Software reset function is used to initialize the SBI which is rocked by external noise,

etc. When SBICR3<SWRST> is set to 1, the internal reset signal pulse is generated

and inputted into the SBI circuit.

All command registers and state registers are initialized to initial values. <SWRST>

is automatically set to 0 after the SBI circuit is initialized.

(15) Serial bus interface data buffer register (SBIDBR)

The SBIDBR register can read out the receiving data and write the sending data.

After the start condition generated in the master mode, set the slave address and the

direction bit in this register.

(16) I2C bus address register (I2CAR)

I2CAR<SA6:0> sets the slave address when the TMP93CS44/S45 are operated as the

slave devices. Setting I2CAR<ALS>

= 0, the slave address output from master device is

recognized, and the data format is changed to the addressing format. Setting

I2CAR<ALS>

= 1, the slave address is not recognized, and the data format is changed

to the free data format.

Noise detection

Noise

SCL (Bus)

SDA pin

SDA (Bus)

<AL>

<MST>

<TRX>

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