IDTCV107E View Datasheet(PDF) - Integrated Device Technology
Part Name
Description
Manufacturer
IDTCV107E Datasheet PDF : 21 Pages
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IDTCV107E
CLOCK GENERATOR FOR DESKTOP PC PLATFORMS
COMMERCIAL TEMPERATURE RANGE
SMBUS PROTOCOL
INDEX BLOCK WRITE PROTOCOL
Bit # of bits From
Description
1
1 Master Start
2-9
8 Master D2h
10
1 Slave Acknowledge
11-18
8 Master Registeroffsetbyte(startingbyte)
19
1 Slave Acknowledge
20-27
8 Master Byte count N (0 is not a valid byte count)(1)
28
1 Slave Acknowledge
29-36
8 Master First data byte
37
1 Slave Acknowledge
38-45
8 Master Second data byte
46
1 Slave Acknowledge
:
Nth data byte
Stop
NOTE:
1. Bit [21:27] = byte count.
Bit 20 = 1, bit [21:27] will be stored into SMBus table, Byte 8. SM Bus Byte 8 is read
byte count register, power on default is 0FH.
Bit 20 = 0, normal SM bus operation.
INDEX BLOCK READ PROTOCOL
Bit # of bits From
Description
1
1 Master Start
2-9
8 Master D2h
10
1 Slave Acknowledge
11-18
8 Master Registeroffsetbyte(startingbyte)
19
1 Slave Acknowledge
20
1 Master Repeatedstart
21-28
8 Master D3h
29
1 Slave Acknowledge
30-37
8 Slave Byte count, N, SMBus table byte 8 value.
Power on default is 0FH[15].
38
1 Master Acknowledge
39-46
8
Slave Offset data byte, specified by bit 11-18
47
1 Master Acknowledge
48-55
8
Slave Offset + 1 data byte
:
Slave Offset + N-2
Master Acknowledge
Slave Offset + N-1
Not acknowledge
Stop
ONECYCLE™ INDEX BLOCK READ
Bit # of bits From
Description
1
1 Master Start
2-9
8 Master D2h
10
1 Slave Acknowledge
11-18
8 Master Registeroffsetbyte(startingbyte)
19
1 Slave Acknowledge
20-27
8 Master 1xxxxxxx. Bit[20] = 1, followed with byte
count, which will be stored into SMBus table
byte 8.
28
1 Slave Acknowledge
29
1 Master Repeatedstart
30-37
8 Master D3h
38
1 Slave Acknowledge
39-46
8
Slave Byte count, N, SMBus table byte 8 value.
Power on default is 0FH[15].
47
1 Master Acknowledge
48-55
8
Slave Offset data byte, specified by bit[11:18]
56
1 Master Acknowledge
57-64
8
Slave Offset + 1 data byte
:
Slave Offset + N-2
Master Acknowledge
Slave Offset + N-1
Not acknowledge
Stop
BYTE WRITE METHODS:
• Setting bit[11:18] = starting address, bit [20:27] = 01H.
BYTE READ METHODS (CHOSE ONE):
• Use IDT OneCycle Index Block Read, bit[20:27] = 10000001.
Notice that byte count register (byte 8) will be changed to 0IH.
• Use Index Block Write protocol to change byte count (byte 8) to
1. After that, use Index Block Read.
TO CHANGE BYTE 8 VALUE:
• Use IDT OneCycle Index Block Read, as above
• Use Index Block Write protocol to change byte 8 value.
6
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