AK2574 Datasheet, PDF (22/30 Pages) Asahi Kasei Microsystems – 156M Laser Diode Driver + APC for Burst Mode

ASAHI KASEI
[AK2574]
5. I²C^TM I/F
5.1 Memory Map
Table5-1showstheEEPROM/Registeraddressmap. Accesstomemory(EEPROM/registers)isdoneviatheI²C^TM
I/F format.
WP (Write Protect) may limit the access of memory as shown in Table 5-2.
Table 5-1 Memory map
Device Address Device Address-1
A0h
1010
A0h
1010
A2h
1010
A4h
1010
A6h
1010
A6h
1010
A8h
1010
A8h
1010
A8h
1010
Device Address-2
000
000
001
010
011
011
100
100
100
Address
00000000 to
01111111
10000000 to
11111111
00000000 to
11111111
00000000 to
11111111
00000000 to
01111111
10000000 to
11111111
00000000 to
00010011
00010011 to
11111110
11111111
Data
User Area
(EEPROM, 1kbit)
No memory
No memory
Adjustment data
(EEPROM, 3kbit)
No memory
Registers
No memory
AK2574 Operation mode
change
Table 5-2 Memory access limitation with WP
Item
Device Address
ACK (Note 1)
WP = “L”
1010xxx
when receive device address
EEPROM / Register
Access
Full access
Operating mode
Page Write
Full
16 byte (without registers)
Sequential Read
from 00000000000 to 01111111111
Registers Access
Random access only
Note 1: During EEPROM Write operation, no ACK is generated.
WP = “H”
1010000
when receive device address
User area only (read only)
Self running mode only
-
from 00000000 to 01111111
-
<MS0266-E-00>
-22-
2003/12