AK8855 Datasheet, PDF (63/81 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Decoder

[ASAHI KASEI]
AK8855
Device Control Interface
The AK8855 is controlled via I2C Bus Control Interface.
[ I2C SLAVE Address ]
I2C Slave Address is 0x88
[ I2C Control Sequence ]
(1) Write Sequence
When the Slave Address of the AK8855 Write mode is received at the first byte, Sub Address at the second
byte
and Data at the third and succeeding bytes are received.
There are 2 operations in Write Sequence - a sequence to write at every single byte, and a sequential write
operation to write multiple bytes successively.
(a) 1 Byte Write Sequence
S lave Address w A Sub Address A
8-bits
1-
8-bits
1-
bit
bit
Data
8-bits
A Stp
1-
bit
(b) Multiple Bytes ( m-bytes ) Write Sequence ( Sequential Write Operation )
S
Slave
Address
w
A
Sub
Address(n)
A
Data(n)
A Data(n+1) A ^---
8-bits
1-
8-bits
1-
8-bits
1-
8-bits
1-
bit
bit
bit
bit
Data(n+m)
8-bits
A stp
1-
bit
(2) Read Sequence
When the Slave Address of the AK8855 Read mode is received, Data at the second and succeeding bytes are
transmitted.
S
Slave
Address
wA
Sub
Address(n)
A rS
Slave
Address
RA
Data1
A
Data1
A Data2 A ---
Data n Ā stp
8-bits
1 8-bits 1
8-bits
1 8-bits 1 8-bits 1 8-bits 1
8-bits 1
Note ) At Sequential Read Operation, the first byte Read-out Data is repeatedly output ( this does not happen in
a normal, single byte Read operation ).
Abbreviated terms listed above mean :
S, rS
A
A-
stp
R/W
: Start Condition
: Acknowledge ( SDA Low )
: Not Acknowledge ( SDA High )
: Stop Condition
1 : Read 0 : Write
: to be controlled by the Master Device. Micro-computer interface is output normally .
: to be controlled by the Slave Device. To be output by the AK8855.
MS0319-E-03
63
2004 / 11