AK2573A Datasheet, PDF (29/38 Pages) Asahi Kasei Microsystems – 125M / 156M Laser Diode Driver + APC

ASAHI KASEI
[AK2573A]
8.2 Read/Write Operation
8.2.1 Byte Write
SDA 1 0 1 0
00
0
0
S
Device
Device R/ A
Address
A
T _{Address-1 Address-2 W} C
(MSB First)
C
A
K
K
R
T
Data
(MSB First)
AS
CT
KO
P
8.2.2 Page Write
AK2573A is capable of 16-byte page write.
SDA 1 0 1 0
00
0
S
Device
Device R/ A
Address
A
T Address-1 Address-2 W C
(MSB First)
C
A
K
K
R
T
Data (Address)
0
0 ....
A
Data (Address + 1)
A
C
C
K
K
0
0
A
C
Data (Address + n)
AS
CT
K
KO
P
8.2.3 Current Address Read
The internal address counter maintains the last address accessed during the last read or write operation, incremented
by one. The roll over address is changed WP setting. Refer to Table 7-2 in detail.
SDA 1 0 1 0
10
S
Device
Device R/ A
T _{Address-1 Address-2 W} C
A
K
R
T
Data
(MSB First)
1
NS
OT
AO
CP
K
8.2.4 Random Read
A random read requires a “dummy” byte write sequence to specified “Address”. After receive the ACK from AK2573A,
perform “current address read” (see 8.2.2).
SDA 1 0 1 0
0 0 *1
S
Device
Device R/ A
T _{Address-1 Address-2 W} C
Address
(MSB First)
A
K
R
T
Dummy Write
0 ₁₀₁₀
10
AS
CT
KA
R
T
Device
Address-1
Device R/ A
Address-2 W C
K
Data
(MSB First)
*1: Don't care when WP="H"
1
NS
OT
AO
CP
K
8.2.5 Sequential Read
Sequential read can be initiated as ether“Current Address Read” or “Random Read”. After issuing either of them, the
AK2573A continues to output data for each ACK received.
SDA ^{. . . .}
10
Device R/ A
Address-2 W C
K
0
Data-1
A
(MSB First)
C
K
0 ^.... 0
Data-2
A
C
A
C
K
K
Data-n
1
NS
OT
AO
CP
K
<MS0189-E-01>
-29-
2004/5