ML6440 View Datasheet(PDF) - Micro Linear Corporation
Part Name
Description
Manufacturer
ML6440 Datasheet PDF : 18 Pages
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ML6440
S DATA
START
tSET/START
tRISE
S CLK
All Other S DATA Transitions Must Occur While S CLK is Low
START: A Falling Edge on the S DATA While S CLK is Held High
STOP: A Rising Edge on the S DATA While S CLK is Held High
tFALL
Figure 2. Definition of START & STOP on Serial Data Bus
STOP
S DATA
S CLK
0
MSB
A7
A6
1
2
A1
A0
7
8
9
MSB
D7
D6
10
11
D1
D0
16
17
18
STOP
S CLK: 9th pulse strobes address decoder
S CLK: Rising edge enables data transfer
S DATA: Value set to A6, Device Address (MSB-1)
S CLK: Falling edge disables data transfer
S CLK: Rising edge enables data transfer
S DATA: Value set to A7, Device Address MSB
S CLK: Falling edge in prep for first address transfer
S DATA: Falling edge w/S CLK high means start of sequence
S DATA: Rising edge with S CLK Hi = STOP
S DATA: Value set low in prep for STOP
S CLK: 18th pulse strobes data shift register
S CLK: Rising edge enables data transfer
S DATA: Value set to D6, Data MSB-1
S CLK: Falling edge disables data transfer
S CLK: Rising edge enables data transfer
S DATA: Value set to D7, Data MSB
Figure 3. Definition of DATA FORMAT on Serial Data Bus
S DATA
S CLK
0
STROBE (ACK)
‘1’ ‘0’ ‘1’ ‘1’ ‘0’ ‘0’ ‘1’ ‘1’ Ø D7 D6 D5 D4 D3 D2 D1 D0
Ø
DEVICE ADDR = ‘B3’
CONTROL REGISTER
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
G
H
I
S CLK: Address decode strobed on 9th clock
[Data is ‘don’t care’ during strobe]
S DATA: ‘1011 0011’ shifted on next 8 clocks
S CLK: Falling edge in prep for device address transfer
Figure 4. Typical Serial Bus Command
SDATA: Final Clock strobes data into register
Control register, load MSB first
9
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