PCM-C418/Configuration
v1.0
www.winsystems.com
Page 34
This write-only register controls the write protect function of the 1 MB SRAM board. On
power up, the write protect bit is cleared (disabling writes) and must be explicitly
enabled by writing a
1
to the I/O port at the BASE a4. To re-enable the write
protection, write a
0
at this register. The
USSD.SYS
device enables writing only during
that time when a sector is being transferred, which contributes greatly to data safety
and integrity.
6.8.12 LAN1 - 10/100 Mbps Ethernet
The PCM-C418 is equipped with a Vortex86DX LAN controller (
LAN1
), and a standard
IEEE 802.3 Ethernet interface for 10/100 (
LAN1
).
See tables below for signal and pin definitions.
LAN1 Layout and
Pin Reference
LAN1 Ethernet Port Indicators
Connector
•
PCB connector: Molex 87832-1006 (LAN1, LAN2)
•
Mating connector: Molex 51110-1051 (housing)
•
Mating connector: Molex 50394-8100 (crimp)
6.8.13 LAN2 - 10/100/1000 Mbps Ethernet
The PCM-C418 is equipped with an Intel I210 Ethernet controller (
LAN2
), and a
standard IEEE 802.3 Ethernet interface for 10/100/1000 (
LAN2
) BASE-T networks.
Table 23:
Offset 4
OFFSET 4 - Write Protect Register
D7 - D6 - Reserved
D0 - Write Protect Bit, 0 = Protected, 1 = Writeable
Pin
Description
Pin
Description
1
TX+
2
TX-
3
RX+
4
NC
5
NC
6
RX-
7
LED0
8
NC
9
LED1
10
NC
Signal
Off-board
LINK/ACTIVITY
LAN1-P7
DUPLEX
LAN1-P9
