emc1428 Standard Microsystems Corp., emc1428 Datasheet - Page 13

• Manufacturer Part Number: emc1428
• Description: 1 Degree C Multiple Temperature Sensor With Hw Thermal Shutdown
• Manufacturer: Standard Microsystems Corp.

START
1°C Multiple Temperature Sensor with HW Thermal Shutdown & Hottest of Thermal Zones
Datasheet
1-> 0
SMSC EMC1428
3.3
3.4
3.5
3.6
START
START
START
1 -> 0
1 -> 0
1 -> 0
ADDRESS
1001_100
SLAVE
Read Byte
Send Byte
Receive Byte
Alert Response Address
The Read Byte protocol is used to read one byte of data from the registers as shown in
The Send Byte protocol is used to set the internal address register pointer to the correct address
location. No data is transferred during the Send Byte protocol as shown in
The Receive Byte protocol is used to read data from a register when the internal register address
pointer is known to be at the right location (e.g. set via Send Byte). This is used for consecutive reads
of the same register as shown in
The ALERT output can be used as a processor interrupt or as an SMBus Alert.
When it detects that the ALERT pin is asserted, the host will send the Alert Response Address (ARA)
to the general address of 000_1100b. All devices with active interrupts will respond with their client
address as shown in
RESPONSE
ADDRESS
ADDRESS
WR
1001_100
1001_100
ADDRESS
0001_100
0
SLAVE
SLAVE
ALERT
ACK
0
REGISTER
ADDRESS
Table 3.6 Alert Response Address Protocol
Table
XXh
Table 3.5 Receive Byte Protocol
WR
3.6.
RD
Table 3.3 Read Byte Protocol
Table 3.4 Send Byte Protocol
0
1
RD
1
ACK
Table
0
DATASHEET
3.5.
START
0 -> 1
ACK
ACK
ACK
13
0
0
0
ADDRESS
1001_100
SLAVE
REGISTER DATA
REGISTER
ADDRESS
1001_1000
ADDRESS
DEVICE
XXh
XXh
RD
1
ACK
0
Table
REGISTER
NACK
NACK
ACK
DATA
XXh
0
1
1
Revision 0.68 (07-08-08)
3.4.
NACK
Table
1
STOP
1 -> 0
STOP
1 -> 0
STOP
1 -> 0
3.3.
STOP
0 -> 1