Eddy DK Programmer Guide
45
2.4.5.8.
Ethernet Controller (WAN Port)
- Davicom DM9000B Ethernet Controller
- 16 bit mode set.
- EECS pin should be connected with pull-up resistor to use link/speed LED.
- RJ45 Transformer Center Tap is powered by DM9000B AVDD18.
Eddy-CPU
v2.1 /v2.5
Signal Name
DM9000B
Signal Name
Description
I/O
PC12/NCS7
CSN
Chip Select #7
Address : 0x8000 0000-0x8FFF FFFF
OUT
PC15/IRQ1
INTRN
Interrupt depend on EECK(pin20) setting.
1 : INT pin low active
0 : INT pin high active
EECK is not connected in DK board, so Interrupt is
acted with active high.
IN
A2
CMD
Command Type
When high, Data port
When low, INDEX port
OUT
D[0:15]
Data Bus
16-bit mode
I/O
