Rainbow Electronics DS1875 - Manual (Page 14)

DS1875
PON Triplexer and SFP Controller
14 ______________________________________________________________________________________
Block Diagram
HBIAS
QUICK-TRIP LIMIT
HTXP
QUICK-TRIP LIMIT
LTXP
QUICK-TRIP LIMIT
APC SET POINT FROM
TRACKING-ERROR TABLE
LATCH
ENABLE
V CC
MON[5:8]
TEMP
SENSOR
I 2 C
INTERFACE
SAMPLE
CONTROL
8-BIT
DAC WITH
SCALING
DIGITAL
APC
INTEGRATOR
8-BIT
PWM-DAC
13-BIT
DAC
ANALOG MUX
MOD LUT
TX-D INPUT 8-BIT
DAC WITH
SCALING
PWM
BIAS MAX
QUICK TRIP
TABLE 08h
BIAS OL LUT
TEMP INDEXED
TABLE 07h
PWM VOLTAGE
LUT CAN BE INDEXED BY
TEMP SENSOR
INTERRUPT
MASK
INTERRUPT
LATCH
INTERRUPT
MASK
INTERRUPT
LATCH
POWER-ON ANALOG
V CC > V POA
NONMASKABLE
INTERRUPT
13-BIT
ADC
DS1865 MEMORY ORGANIZATION
SRAM RESET
DIGITAL LIMIT
COMPARATOR FOR
ADC RESULTS
MUX
MUX
MUX
TX-D
MON5
MUX
BMD
BEN
MON3N
MON3P
MON2
MON1
MON4
SCL
SDA
TTL
LOSI
0
1
TTL MON5/D0
LOS STATUS/
D0 IN
D0 OUT
TTL
0
1
MUX0
TTL MON6/D1 D1 IN
D1 OUT
TTL MON7/D2 D2 IN
D2 OUT
MUX2
INV M3QT
M3QT
TTL MON8/D3 D3 IN
D3 OUT
GND
INV0
DAC1
8-BIT, 2.5V
FULL SCALE
I 2 C CONTROL DAC1
FETG
BIAS
MOD
M4DAC
8-BIT, 2.5V
FULL SCALE
TABLE 06h
M4DAC LUT INDEXED BY MON4
M4DAC
I 2 C CONTROL
V CC
V CC
EEPROM
256 BYTES AT
A0h SLAVE
ADDRESS
TX-F
TABLE 02h (EEPROM)
CONFIGURATION AND CALIBRATION
TABLE 06h (EEPROM)
M4DAC LUT
TABLE 03h (EEPROM)
USER MEMORY
TABLE 07h (EEPROM)
PWM LUT
TABLE 04h (EEPROM)
MODULATION LUT
TABLE 08h (EEPROM)
BIAS OL LUT
MAIN MEMORY
EEPROM/SRAM
ADC CONFIGURATION/RESULTS
SYSTEM STATUS BITS
ALARM/WARNING COMPARISONS
TABLE 00h (EEPROM)
ADDITIONAL MONITORS
TABLE 01h (EEPROM)
USER MEMORY, ALARM TRAP
TABLE 05h (EEPROM)
ADC TE LUT
SW
COMP
FB
MON6
MON7
MON8
DS1875