Table of Contents
Advertisement
6.2.14 LAN Control Circuit
LAN Controller
CCD PCB
S-DRAM 8MB
(IC7)
Page
Line
Memory
Memory
(2)
ECM
Buffer
FROM 4MB
Image Memory
(IC10)
1. LAN Controller (IC1)
This conforms to IEEE 802.3 Ethernet Controller. The CPU (SC PCB) bus is directly connected and the
data interrupt is controlled by pLANINT. The 25 MHz clock is supplied by OSC 1. The LAN Controller
for the system timing clock divides the frequency provided from OSC1. The clock signal is also
supplied for the Manchester encoding/decoding circuit for data conversion.
The LAN Controller is a mixed signal Analog/Digital device that implements the MAC and PHY portion
of the CSMA/CD protocol at 10 and 100Mbps.
The LAN controller contains a built in 8 KByte RAM for transmission and reception buffer.
2. EEPROM (IC2)
This memory stores the configuration registers and MAC (Media Access Control) address for the LAN
controller. Data is transferred to LAN controller (serial transfer) when the power is turned "On". The
MAC address for the LAN controller represents the location on the LAN.
3. Filter Transformer (T1)
A choke module transformer with a EMI filter. The output TX signal from the LAN controller is
differentiated and transmitted on to the LAN via this module. Similarly, the input RX signal
(differential input pair) is terminated by an externally connected 75 ohms resistor and input to the LAN
controller via this module.
4. Ethernet Interface
Provides the 10Base-T/100Base-TX Ethernet interface.
Edition 1.0
MN86075
(IC30)
DZAC000273
D-BUS
CPU
V850E/MA1
(IC1)
LANB
SHINE
PCB
(IC3)
FROM 4MB
Program
(IC9)
234
Laser Printer
Transformer
RJ45
(T1)
LANC
PCB
LAN Controller
(IC1)
MODEM
MN195006
(I22)
DAA
Si3021,
Line
Si3015
(IC23,24)
DX-600/800
INTERNET
(10Base-T/100Base-TX)
(1)
LINK
ACTIVITY
APR 2002
Advertisement
Table of Contents
Troubleshooting
