EMC1002-1-ACZT SMSC, EMC1002-1-ACZT Datasheet - Page 8

• Manufacturer Part Number: EMC1002-1-ACZT
• Description: Board Mount Temperature Sensors Dual Zone SMBus Temp Snsr
• Manufacturer: SMSC

Specifications of EMC1002-1-ACZT

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Revision 1.4 (12-18-07)
3.4
3.5
3.6
FIELD:
Bits:
FIELD:
Bits:
Receive Byte
Alert Response Address
SMBus Addresses
START
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 can be used for consecutive
reads of the same register as shown below:
The
The Alert Response Address is polled by the Host whenever it detects an SMBALERT#, i.e. when the
ALERT
respond with its device address as shown below:
The EMC1002-2 may be configured to one of four 7-bit slave addresses that are enabled based on
the pull-up resistor on the
address per
EMC1002 SMBus interface with an invalid slave address or invalid protocol results in no response from
the device and does not affect its register contents. The EMC1002 supports stretching of the SMCLK
signal by other devices on the SMBus but will not perform this operation itself. The EMC1002 has an
SMBus timeout feature. Bit 7 of the Consecutive Alert register enables this function when set to 1 (the
default setting is 0). When this feature is enabled, the SMBus will timeout after approximately 25ms
of inactivity.
1
START
ALERT
1
/
THERM2
Table 3.5 Modified SMBus Receive Byte Protocol Response to ARA
/
THERM2
RESPONSE
ADDRESS
Table 1.2, “Ordering Information,” on page
ALERT
SLAVE ADDR
pin is asserted. The EMC1002 will acknowledge the Alert Response Address and
7
output can be used as an SMBALERT# as described in
Table 3.4 SMBus Receive Byte Protocol
7
ADDR
RD
/
1
THERM
DATASHEET
RD
1
ACK
pin. The value of this pull-up resistor determines the slave
1
8
ACK
1
1°C Dual SMBus Sensor with Resistance Error Correction
EMC1002 SLAVE
ADDRESS
3. Attempting to communicate with the
REG. DATA
8
8
Section 4.5 on page
NACK
NACK
1
1
SMSC EMC1002
Datasheet
STOP
STOP
1
1
11.