ak2573a AKM Semiconductor, Inc., ak2573a Datasheet - Page 31

• Manufacturer Part Number: ak2573a
• Description: 125m / 156m Laser Diode Driver Apc - Asahi Kasei Microsystems
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
8.3 EEPROM
EEPROM memory map is shown in Table 8-3, 8-4 and 8-5.
EEPROM access is limited with WP pin and Operation mode (refer to Table 9-1, for more information).
(Note) The AKM factory adjusted data are stored in advance at address (Device Address2 = 011, Address=60h) for
Table 8-3 EEPROM Address MAP
<MS0189-E-01>
WP = “ L” : Full access
Address
WP = “ H” : User area only with read only
Device
A0h
A0h
A2h
A4h
A4h
A6h
A6h
A6h
A6h
the offset of the on-chip temperature sensor. If such excess temperature stress is to be applied to this device
which exceeds a guaranteed EEPROM data retention conditions ( for 10 years at 85 ), it is important to read
the pre-determined value in advance and to re-write the same data back into EEPROM after an exposure to
the excess temperature environment. Even if the exposure time is shorter than the retention time, any
accelerated temperature stress tests (such as baking) are performed, it is recommended to read the pre-set
data first and to re-write it after the tests.
00h (0)
&
7Fh (127)
80h (128)
&
FFh (255)
00h (0)
&
FFh (255)
00 h(0)
&
7F h(127)
80h (128)
&
FFh (255)
00h (0)
&
1Fh(31)
20h (32)
&
3Fh (63)
40h (64)
&
5Fh (95)
60h (96)
&
7Fh (255)
Address
DATA (D7-D0)
User Area
(1kbit)
No Memory
E_DAC1_TC
Temperature data for I-DA C1 (1kbit)
E_DAC2_TC
Temperature data for I-DA C2 (1kbit)
E_DUTY_TC (5bit)
Temperature
Adjustment (256bit)
E_APC_TRGT_TC (5bit)
Temperature data for APC FB
reference (R_APC_TARGT) (256bit)
MSB 4bit: E_CURRALM_DAC1_TC
LSB 4bit: E_CURRALM_DAC2_TC
Temperature data for CURRALM
(256bit)
Adjustment data
(256bit)
data
for
-31-
Duty
Initial
Value
00h
00h
00h
00h
00h
FFh
see Table 8-4 and 8-5
Remark
Addressing with R_TEMP
(1.5# step)
Addressing with R_TEMP
(1.5# step)
Addressing with MSB 5bit of
R_TEMP
(6# step)
Addressing with MSB 5bit of
R_TEMP
(6# step)
Addressing with MSB 5bit of
R_TEMP
(6# step)
[AK2573A]
2004/5