Controller drives SDA

Target drives SDA

S

A6

A5

A4

A3

A2

A1

A0

0

A

0

0

0

0

0

0

P1

P0

A

D15

D14

D13

D12

D11

D10

D9

D8

A

D7

D6

D5

D4

D3

D2

D1

D0

NA

P

START

R/W

ACK from Target

ACK from Target

ACK from Controller

NACK from Controller

STOP

Target Address

Register Pointer (N)

Data to Register N (MSB)

Data to Register N (LSB)

RS

A6

A5

A4

A3

A2

A1

A0

1

A

START

R/W

Target Address

Figure 7-10. Read from Single Register

7.5.4.3 General Call Reset Function

The TMP110 responds to a general-call address (0000 000) if the eighth bit is 0b. The device acknowledges

the general-call address and responds to commands in the second byte. If the second byte is 0000b 0110b, the

TMP110 internal registers are reset to power-up values as shown in SMBus General Call Reset Timing Diagram.

The serial address is unaffected by the general call reset.

S

0

0

0

0

0

0

0

0

A

START

General Call Address

0

0

0

0

1

1

0

A

0

ACK from Target

ACK from Target

Target controls SDA line

Controller controls SDA line

P

STOP

Reset Command

Figure 7-11. SMBus General Call Reset Timing Diagram

7.5.4.4 SMBus Alert Response

The TMP110 device supports the SMBus alert response. When the TMP110 operates in Alert Mode, and the

ALERT pin is available, the controller can sense that an alert condition is present. Irrespective of the availability

of the ALERT pin, the alert status is set. As shown in Figure 7-12, if the controller sends an SMBus alert

command (19h or 00011001b) on the bus, and the alert is set, the device acknowledges the SMBus alert

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TMP110

SNIS233 – FEBRUARY 2024

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