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EMC1063-4-ACZL-TR

1°C Triple Temperature Sensor with Hotter of Two Zones

SMSC -> Microchip 

1°C Triple Temperature Sensor with Hotter of Two Zones

Datasheet

Note 2.1

Note 2.2

300nS rise time max is required for 400kHz bus operation. For lower clock frequencies,

the maximum rise time is (0.1/FSMB)+50nS

See SMSC Applications for Application Notes and Guidelines when measuring GPU

processor diodes and CPU processor diodes.

2.3

System Management Bus Interface Protocol

A host controller, such as an SMSC I/O controller, communicates with the EMC1063 via the two wire

serial interface named SMBus. The SMBus interface is used to read and write registers in the

EMC1063, which is a slave-only device. A detailed timing diagram is shown in Figure 2.1.

SMCLK

TLOW

THIGH

TR

TF

THD:STA

TSU:STO

THD:STA

THD:DAT TSU:DAT

TSU:STA

SMDATA

TBUF

P

S S - Start Condition

S

P - Stop Condition P

Figure 2.1 System Management Bus Timing Diagram

The EMC1063 implements a subset of the SMBus specification and supports Write Byte, Read Byte,

Send Byte, and Receive Byte protocols as shown. In the tables that describe the protocol, the “gray”

columns indicate that the slave is driving the bus.

All of the below protocols use the following convention:

2.3.1

DATA SENT

TO DEVICE

# of bits sent

DATA SENT TO

THE HOST

# of bits sent

Write Byte

The Write Byte is used to write one byte of data to the registers as shown in Table 2.3.

START

1

SLAVE ADDRESS

7

Table 2.3 Write Byte Protocol

WR

ACK

1

1

COMMAND

8

ACK

1

DATA

8

ACK

1

STOP

1

2.3.2

Read Byte

The Read Byte protocol is used to read one byte of data from the registers as shown in Table 2.4.

Table 2.4 Read Byte Protocol

SLAVE

SLAVE

START ADDRESS WR ACK COMMAND ACK START ADDRESS RD ACK DATA NACK STOP

SMSC EMC1063

9

DATASHEET

Revision 1.44 (04-14-08)

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