MDS 1532 G

21

Revision 060804

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ICS1532

Chapter 10

Programming

10.1

I2C Serial Bus: Data Format

Figure 10-1.

ICS1532 Data Format for I2C Serial Bus

Note: In general, the:

read from the ICS1532.

re-address the ICS1532. As a result, to write or read all the ICS1532 registers, the software:

– Must NOT index 0 and then do 64 one-byte transactions.

– Must break the transactions into at least four separate bus transactions:

(1) 00 to 0F (2) 10 to 1F (3) 20 to 2F (4) 30 to 3F

W r it e P r o c ed u r e f o r S in g le Re g is t er

MS B

L S B

S

010010X W A

A

A

Slav e a ddr es s

Re g s ite r In dex

Da ta

Re a d P r o c ed u r e f o r S in g le Re g ist er

MS B

L S B

MS B

L S B

S

010010X W A

AS

010

010X

R A

A

Slav e a ddr es s

Re g s ite r In dex

Slav e ad dr es s

Data

Repe at STA RT

NO A c kn ow le d g e

W r it e P r o c ed u r e f o r M u lt ip le Re g is t er s ( No t e 1 )

MS B

L S B

S

010010X W A

A

A

A

A

Slav e a ddr es s

Re g s ite r In dex

Da ta

Da ta

Re a d P r o c ed u r e f o r M u lt ip le Re g ist er s ( No t e 1 )

MS B

L S B

MS B

L S B

S

010010X W A

AS

010

010X

R A

A

A

Slav e a ddr es s

Re g s ite r In dex

Slav e ad dr es s

Data

Data

Repe at STA RT

NO A c kn o w ledg e

Le ge nd

A ll v a lues are s ent w ith the m os t -s ignific ant bit (M S B ) firs t and leas t-s ignific ant bit (L S B ) la s t.

R

= R e ad = 1

W

= W rite = 0

S

= S t art (S D A goes lo w w hen S C L w a s high , then S C L goes lo w too)

A

= A C K = A c k n ow le d ge = 0

A

= N A K = N o A c k n ow le g e = 1

X

= B it v a lue that equals logic s t ate of S B A D R pin.

= (D as hed Line) M u lt ip le trans ac tions

B us M a s ter driv es s ignal to IC S 1532

IC S 1532 (S la v e D e v ic e ) driv es s ignal to B u s M a s t er

Stop

Stop

Stop

Stop