ak8823 AKM Semiconductor, Inc., ak8823 Datasheet - Page 58

• Manufacturer Part Number: ak8823
• Description: Hdtv & Ntsc/pal Multi-format Encoder Sdtv/hdtv X2 Oversampling 5ch Dacs
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
17. Device Control Interface
The AK8823 is controlled via I2C Bus Control Interface.
[ I2C Bus Slave Address ]
I2C Slave Address is selectable to be either 0x40 or 0x42 by SELA pin setting.
[ I2C Control Sequence ]
( 1 ) Write Sequence
When the Slave Address of the AK8823 Write mode is received at the first byte, Sub-Address at the second byte and Data at
the third & succeeding bytes are received.
There are 2 operations in Write sequence—
A sequence to write at every single byte and a sequential write operation that to write multiple bytes successively.
( 2 ) Read Sequence
When the Slave Address of the AK8823 Read Mode is received at the first byte, data at the second and succeeding bytes are
transmitted from the AK8823.
Abbreviated Terms listed above mean :
S, rS
A
Ā
stp
R / W
MS0549-E-02
( a ) Single Byte Write Sequence
( b ) Multiple Byte ( m-bytes ) Write Sequence ( Sequential Write Operation )
SELA pin state
pull-down [ low ]
pull-up [ high ]
S
S
S
(*) SLAVE Address is depicted in 8-bits, LSB is reserved for W/R bit.
Address
Slave
: Start Condition
: Acknowledge ( SDA low )
: Not Acknowledged ( SDA high )
: Stop Condition
: 1 : Read
Address
Address
8-bits
Slave
Slave
8-bits
8-bits
w A
w
1
: to be controlled by the Master Device. To be output by micro-computer normally.
: to be controlled by the Slave Device. To be output by the AK8823.
w
Address(n)
bit
1-
8-bits
A
A
1
Sub
0 : Write
SLAVE Address(*)
0x40
0x42
Address
Address(n)
8-bits
Sub
8-bits
Sub
A
1
rS
bit
1-
A
Address
A
1
Slave
8-bits
Data(n)
8-bits
8-bits
Data
R A
58
1
bit
Data1
8-bits
1-
A
A
1
Data(n+1)
Stp
8-bits
A
1
Data2
8-bits
A
1
A
1
…
Data3
8-bits
Data(n+m)
8-bits
A
1
…
Data n
A
8-bits
1
stp
Ā
1
2006/10
[AK8823]
stp