ak2574 AKM Semiconductor, Inc., ak2574 Datasheet - Page 24

• Manufacturer Part Number: ak2574
• Description: 156m Laser Diode Driver Apc For Burst Mode
• Manufacturer: AKM Semiconductor, Inc.

The SDA pin is normally pulled high with 4.7k to 10k!. Data on the SDA pin may change only during SCL low time
period. Data changes during SCL high periods will indicate a start or stop condition.
Start Condition: A high-to-low transition of SDA with SCL high is a start condition that must precede any other
Stop Condition: A low-to-high transition of SDA with SCL high is a stop condition.
ASAHI KASEI
5.2.6
5.2.7
5.3 EEPROM
EEPROM memory map is shown in Table 5-3, 5-4 and 5-5.
EEPROM access is limited with WP pin and Operation mode (refer to Table 6-1, for more information).
(Note) The AKM factory adjusted data are stored in advance at address (Device Address = A6h, Address = 60h) for
<MS0266-E-00>
SCL
SCL
SDA
SDA
WP = “ L” : Full access
WP = “ H” : User area only with read only
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.
Data Change
Start / Stop Condition
START
command.
Stable
Data
Change
Data
-24-
STOP
[AK2574]
2003/12