ML6440 datasheet(9/18 Pages) MICRO-LINEAR

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ML6440

Figure 4. Typical Serial Bus Command

Figure 2. Definition of START & STOP on Serial Data Bus

Figure 3. Definition of DATA FORMAT on Serial Data Bus

S DATA

S CLK

START

STOP

tRISE

tFALL

tSET/START

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

S DATA

STOP

MSB

S CLK:

S DATA:

S CLK:

S DATA:

S CLK:

S DATA:

9th pulse strobes address decoder

Rising edge enables data transfer

Value set to A6, Device Address (MSB-1)

Falling edge disables data transfer

Rising edge enables data transfer

Value set to A7, Device Address MSB

Falling edge in prep for first address transfer

Falling edge w/S CLK high means start of sequence

S DATA:

S CLK:

S DATA:

S CLK:

S DATA:

Rising edge with S CLK Hi = STOP

Value set low in prep for STOP

18th pulse strobes data shift register

Rising edge enables data transfer

Value set to D6, Data MSB-1

Falling edge disables data transfer

Rising edge enables data transfer

Value set to D7, Data MSB

S CLK

S DATA

S CLK

‘1’

‘0’

‘1’

‘0’

‘1’

ABC

S CLK:

S DATA:

S CLK:

Address decode strobed on 9th clock

[Data is ‘don’t care’ during strobe]

‘1011 0011’ shifted on next 8 clocks

Falling edge in prep for device address transfer

SDATA:

Control register, load MSB first

Final Clock strobes data into register

DEVICE ADDR = ‘B3’

CONTROL REGISTER

STROBE (ACK)

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