Справочник Пользователя для Mitsubishi Electronics C6/C64
2. EXPLANATION OF MODULE FUNCTIONS
2.7 HR877/879 Card
II - 11
2.7 HR877/879 Card
[Block diagram]
RTBUS
Buff
PLD
HR877
HR879
Rotary switch, setting, etc.
System ROM
Work RAM
16-bit bus
Add-on
connector
connector
Gate array for
bus I/F
bus I/F
2-port RAM
MDP:Mitsubishi DataLink Processer
MPU
MDP2
MDP2
*
Optical fiber cable
Gate array for
transmission I/F
transmission I/F
HR879: SI type (500m between stations)
Medium I/F
Medium I/F
LED
[Explanation of functions]
HR877/879 functions as MELSECNET/10 (optical loop interface).
Sections common for coaxial and optical use (Base PCB ... HR877)
Sections common for coaxial and optical use (Base PCB ... HR877)
ASIC
Gate array for bus interface
Memory 2-port
RAM
Work
RAM
System
ROM
Add-on connector
Various setting switches
Various setting switches
Section dedicated for optical loop interface (Add-on PCB ... HR879)
MPU
ASIC
ASIC
Gate array for transmission I/F
Optic medium I/F SI type (500m between stations)
Monitor LED
Monitor LED