Ds1862 xfp laser control and digital diagnostic ic, Block diagram – Rainbow Electronics DS1862 User Manual
Page 14
DS1862
XFP Laser Control and Digital Diagnostic IC
14
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Block Diagram
MUX
V
CC2
TX-P
LOGIC
SDA
SCL
MOD-DESEL
IBIASMON
RSSI
BMD
AUX1MON
ALARM AND
WARNING
THRESHOLDS
ALARM AND
WARNING
THRESHOLDS
INTERRUPT
WARNING
FLAGS
ALARM
FLAGS
EN1
EN2
RX-LOS
SC-TX-LOS
SC-RX-LOL
SC-RX-LOS
V
CC3
V
CC2
V
CC3
V
CC2
AUX2MON
TX-P
I
BMD
TX-P
HIGH-BIAS ALARM THRESHOLD
HIGH TX_P ALARM THRESHOLD
LOW TX_P ALARM THRESHOLD
I
BIASSET
BIAS AND MOD
ENABLE
TX-F
STARTUP
INITIALIZATION
AND
LASER SAFETY
SHUTDOWN
BLOCK
HIGH-BIAS ALARM
HIGH TX_P ALARM
LOW TX_P ALARM
SOFT TX-D
V
CC2
OR V
CC3
P-DOWN/RST
TX-D
FETG
INT
GAIN
ALARM FLAGS
W
ARNING FLAGS
MASKING BITS
ADC 13 BIT
OFFSET
RIGHT
SHIFTING
I
2
C
INTERFACE
MEASURED DATA
COMP
ARA
TORS
V
CC3
V
CC3
INTERRUPT
MOD-NR
GND
LOWER MEMORY
ADDRESS
R/W
DATA BUS
ADDRESS
R/W
DATA BUS
INT
TABLE-SELECT BYTE
TABLE
01h
SERIAL ID
DATA
TABLE
02h
EEPROM
TABLE
03h
LUT
TABLE
05h
THRSET
TABLE
04h
MODULE
CONFIG
THRSET
MODSET
BIASSET
HIGH-BIAS QT
I
BMD
A
EXT
(I
BMD
)
BIAS AND
MODULATION
ENABLE
MASKING BITS
R
PU
R
PU
R
PU
MISC
CONTROL
SIGNALS
TEMPERATURE
CONTROLED
WITH
LUT
TEMPERATURE
SENSOR
V
CC3
I TO V
A
DS1862