P R E L I M I N A RY I N F O R M AT I O N
ICS1493-17
Clock Synthesizer for Portable Systems
.
Byte Write Protocol
Bit
1
2:8
9
10
11:18
Start
Slave address - 7 bits
Write = 0
Acknowledge from slave
Command code — 8 bit
‘10000000’ stands for byte operation,
bits[1:0] of the command code represents
the offset of the byte to be accessed
Acknowledge from slave
Data byte from master— 8 bits
Acknowledge from slave
Stop
Byte Read Protocol
Bit
1
2:8
9
10
11:18
Start
Slave address - 7 bits
Write = 0
Acknowledge from slave
Command code — 8 bit
‘10000000’ stands for byte operation, bits[1:0]
of the command code represents the offset of
the byte to be accessed
Acknowledge from slave
Repeat start
Slave address — 7 bits
Read = 1
Acknowledge from slave
Data byte from slave — 8 bits
Not Acknowledge from master
Stop
Description
Description
19
20:27
28
29
19
20
21:27
28
29
30:37
38
39
Byte 0: Vendor ID, Revision Code
Bit
7
6
5
4
3
2
1
0
@Pup
0
0
0
1
1
1
1
1
Name
Revision Code(MSB)
Revision Code
Revision Code
Revision Code(LSB)
Vendor ID(MSB)
Vendor ID
Vendor ID
Vendor ID(LSB)
Description
Revision Code
Revision Code
Revision Code
Revision Code
Vendor ID
Vendor ID
Vendor ID
Vendor ID
MDS 1493-17 A
Integrated Circuit Systems
●
8
525 Ra ce Stree t, Sa n Jose, CA 951 26
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Revision 101005
te l (4 08) 297 -1201
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w w w. i c s t . c o m
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
