DS1094L Datasheet, PDF (11/11 Pages) Dallas Semiconductor – Multiphase Spread-Spectrum EconOscillator

Multiphase Spread-Spectrum EconOscillator
TYPICAL 2-WIRE WRITE TRANSACTION
MSB
LSB
MSB
LSB
MSB
LSB
START
10
1
1
A2* A1* A0* R/W
SLAVE
ACK
b7 b6 b5 b4 b3 b2 b1 b0
SLAVE
ACK
b7
b6
b5
b4
b3
b2
b1
b0
SLAVE
ACK
STOP
SLAVE ADDRESS
READ/
COMMAND/REGISTER ADDRESS
DATA
WRITE
* THE ADDRESS DETERMINED BY A0, A1, AND A2 MUST MATCH THE ADDRESS SET IN THE ADDR REGISTER.
EXAMPLE 2-WIRE TRANSACTIONS (WHEN A0, A1, AND A2 ARE ZERO)
A) SINGLE BYTE WRITE
-WRITE DAC REGISTER TO 0Ah
B0h
08h
0Ah
START 1 0 1 1 0 0 0 0
SLAVE
ACK
00
0
01
00
0
SLAVE
ACK
0 00 0 1
010
SLAVE
ACK
STOP
B) SINGLE BYTE READ
-READ DAC REGISTER
B0h
08h
B1h
DATA
START 1 0 1 1 0 0 0 0
SLAVE
ACK
00
0
01
00
0
SLAVE
ACK
REPEATED
START
10110 001
SLAVE
ACK
DAC VALUE
MASTER
NACK
STOP
C) SINGLE BYTE WRITE
-WRITE PRESCALER
REGISTER TO CDh
D) WRITE EE COMMAND
- NEEDED ONLY IF WC = 1
B0h
02h
CDh
START 1 0 1 1 0 0 0 0
SLAVE
ACK
00
0
00
01
0
SLAVE
ACK
1 10 0 1
101
SLAVE
ACK
STOP
B0h
3Fh
START 1 0 1 1 0 0 0 0
SLAVE
ACK
00
1
11
11
1
SLAVE
ACK
STOP
Figure 5. 2-Wire Communication Examples
Chip Topology
TRANSISTOR COUNT: 7987
SUBSTRATE CONNECTED TO: GROUND
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