Справочник Пользователя для Mitsubishi Electronics C6/C64
2. EXPLANATION OF MODULE FUNCTIONS
2.5 HR875/876 Card
II - 8
2.5 HR875/876 Card
[Block diagram]
RTBUS
Connect to control
unit’s back panel
unit’s back panel
Ethernet
Controller
Controller
EEPROM
PLD
Trans-
former
former
PC
IE
XT
EX
T
P
CI
2
ETHERNET
Add-on
connector
connector
Modular
jack
jack
HR875
S
R A M
SRAM
HR876
SRAM
Physical
layer
Transceiver
layer
Transceiver
Twisted
pair cable
pair cable
[Explanation of functions]
The HR875/876 card functions as the 10Base-T Ethernet.
□ Bus conversion section (Base PCB ... HR875)
□ Bus conversion section (Base PCB ... HR875)
Memory SRAM
Add-on connector
Add-on connector
□ Ethernet interface section (Add-on PCB ... HR876)
Ethernet Controller
Physical Layer Transceiver
Transformer
Modular jack
Add-on connector
Memory SRAM
EEPROM
Monitor LED
Physical Layer Transceiver
Transformer
Modular jack
Add-on connector
Memory SRAM
EEPROM
Monitor LED
[Connector layout diagram]
COL
SPEED
LIN
K
RTBUS
FDPO
L
ISP
PCIEXT/EXTPCI2
HR875
RX
TX
ETHERNET
HR876
[Explanation of LEDs]
RX
: (Green) ON when receiving packet
TX
: (Green) ON when transmitting packet
COL
: (Green) ON when collision occurs
SPEED : (Green) ON during 100Base-T communication (always OFF)
LINK
LINK
: (Green) ON when mutual communication is possible
FDPOL : (Green) ON during full-duplex communication