- Thomson Digital Technology Co. Ltd. Network Interface Module Instruction Manual

62 8900NET Instruction Manual
Functional Description
Functional Description
Refer to the block diagram in Figure 37 while reading the following func-
tional description.
Figure 37. 8900NET Block Diagram
Temperature Sensing
Two temperature sensors on the module report to the microprocessor when
they detect:
• External ambient temperature above 50° C, or
• Internal frame temperature above 70° C.
The microprocessor will then report a temperature fault.
0612-01
Alarm
Bus
Boot ROM
SDRAM
NVRAM
Temperature
Sensing
SMPTE
Alarm
Signal
Processing
Microprocessor
+12 V
+5 V
+3.3 V
Ethernet/MAC Address
SMPTE
Relay
RS-232
Driver
On-board
Regulator
Module Cells
Frame Bus
Fan Speed
Control and
Rotation
Sensing
To Fan Assembly
SMPTE Alarm
(BNC)
Module Health Bus
Module
Present
Detection
Power Supply
Cells
Ethernet (RJ-45)
RS-232 (9-pin D)
10BaseT Ethernet
User
Setup
Sw.
User
Setup
Sw.
LEDs
M
o
t
h
e
r
b
o
a
r
d