AK2571 Datasheet, PDF (28/52 Pages) Asahi Kasei Microsystems – Single-Chip Automatic Power/Temperature Control for WDM Laser Diodes

AKM Confidential
AK2571
6.2 STATUS_MON pin output
Set R_STATUS_MON (E_STATUS_SET), and monitor the status in AK2571 through STATUS_MON pin. Table 6-2
indicates the setting
Table 6-2 STATUS_MON output
E_STATUS_SET[2:0]
000
001
010
011
100
101
110
111
STATUS_MON output
ATC_LOCK ATC Lock count up
APC_END
APC Count-up expiring
E_FIX_CTRL
Move to normal operation
APC_FB
APC Feedback working
ATC_FB
ATC Feedback working
REG
Register access mode
PID_SIGN
PID control direction
APC_COMP
APC_COMP output
Remarks
0: counting
1: count up
0: APC Count-up or Count-up disable
1: APC Count-up expiring
0: before normal operation (start up)
1: Normal Operation
0: APC Feedback Compensation current=0
1: APC Feedback Compensation current>0
0: ATC Feedback target temp. shift=0
1: ATC Feedback target temp. shift>0
0: Self operation or EEPROM mode
1: Register access mode
0: Heating
1: Cooling
0: PDIN is higher than target
1: PDIN is lower than target
7. EEPROM
The internal 4k-bits EEPROM is composed of 16-bits*256 addresses. The memory map is shown in Table 7-1. Two MSB
bits are set by WAVE0 and 1,. It is possible to change the target temperature via pin strapping if the adjustment data for
each wavelength is stored in an EEPROM address.. Table 7-2 indicate the relationship between WAVE0, 1 and the
EEPROM addresses. Addresses from [xx111010] to [xx111111], which contain system data, user program area and AKM
factory data, are valid regardless of the settings of WAVE0,1.
<Rev. 0.6E Preliminary>
-28-
2001/11