AK8853XQ Datasheet, PDF (39/70 Pages) Asahi Kasei Microsystems – NTSC/PAL/SECAM Digital Video Decoder

[AK8853XQ/ VN]
8. Device control interface
The AK8853 is controlled via I²C bus control interface, as described below.
8.1 I²C bus SLAVE Address
The I²C slave address can be selected by a SELA pin setting of either [1000100] or [1000101].
SELA pin status
Pulldown [Low]
Pullup [High]
Slave Address
MSB
1 00010
1 00010
LSB
0 R/W
1 R/W
8.2 I²C Control Sequence
8.2.1 Write sequence
After receiving a write-mode slave address first byte, the AK8853 receives the sub-address in the
second byte and data in the subsequent bytes. The write sequence may be single-byte or multi-byte.
Single-byte write sequence
S
Slave
Address
8-bits
wA
Sub
Address
A
Data
1-
bit
8-bits
1-
bit
8-bits
A Stp
1-
bit
Multi-byte write sequence (m-bytes, sequential write operation)
S
Slave
Address
wA
Sub
Address A
(n)
Data(n)
A
Data
(n+1)
8-bits
1-
bit
8-bits
1-
bit
8-bits
1-
bit
8-bits
A
‘’’’’’’
Data
(n+m)
1-
bit
8-bits
A stp
1-
bit
8.2.2 Read sequence
After receiving a read-mode salve address as the first byte, the AK8853 sends data in the second and
subsequent bytes.
Slave
S Addres
s
w
Sub
A Address A rS
(n)
Slave
Address
R
A
Data1
A
Data
2
A Data3
A
‘’’‘’
8-bits
1 8-bits 1
8-bits
1 8-bits 1 8-bits 1 8-bits 1
’‘’’’’‘’’
‘’‘
Data
n
!A stp
8-bits 1
Symbols and abbreviations
S: Start Condition
rS: repeated Start Condition
A: Acknowledge (SDA Low)
!A: Not Acknowledge (SDA High)
stp: Stop Condition
R/W: 1: Read; 0: Write
: Received from master device (normally microprocessor)
: Output by slave device (AK8853)
Rev-E-00
39
2008/01