AK2571 Datasheet, PDF (23/52 Pages) Asahi Kasei Microsystems – Single-Chip Automatic Power/Temperature Control for WDM Laser Diodes

AKM Confidential
AK2571
Table 5-2
Condition
of finish
ATC status APC status APC_FB
Power ON
ATC_FB
APCALM ATCALM
Status-1
ATC Lock ATC Lock
(Only ATC
work)
Disable
Disable
Disable
User setting User setting
Status-2
APC
(APC Count Count up
up work)
Normal
operation
Count up or Disable
Disable
(User setting)
Disable
User setting User setting
Status-3
(Normal
operation)
Normal Normal
operation operation
User setting User setting User setting User setting
Figure 5-2 Start up sequence
ATC Lock (ATC Work)
APC Count_Up
Reset ATC_LK_COUNTER
R_LK_TMPRT_WIN
R_TMPRT_
TRGT
ATC_LK_COUNTER
UP
Countup I-DAC by one
step
Normal
Operation
ATC_COUNTER UP
Expiring
ATC_LK_COUNTER
tothe thereshold
(E_LK_CNT_SET), move
to next status
Timer Count up
Expiring count up of
the settled I-DAC,
move to next status
When the timer
expire, move
tonormal
operation,TIMERAL
M=L
Power-On-Reset Release
Time [s]
When the timer expire,
doesn't reach to normal
operation, TIMERALM=H
<Rev. 0.6E Preliminary>
-23-
2001/11