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ADM5120 Interface Description
Pin Name
BGA Ball
PQFP Pin#
Type Descriptions
LED1[1] state, default = 0101,
speed
LED1[0] state, default = 1001,
link/activity
LED0[2:0]
A14, E13, B14
164, 165, 166
O
LED0[2] state, default = 1010,
duplex/col
LED0[1] state, default = 0101,
speed
LED0[0] state, default = 1001,
link/activity
Note:
Registers, not hardware pins, control the LED display. There are 3 LEDs per port, and they can be
programmed to any state, the programming information can be found in Table 2-1 below.
Note: to avoid the SSO problem, shift 10ns between each LED enable.
Function State
GPIO_in (or GPIO_disable)
0000
GPIO_output_flash 0001
GPIO_output_0 0010
GPIO_output_1 0011
link (steady)
0100
speed (steady)
0101
duplex (steady)
0110
activity (flash)
0111
collision (flash)
1000
link+activity 1001
collision 1010
1activity 1011
10activity 1100
Reserved 1101
Reserved 1110
Reserved 1111
Table 2-3 LED Program Table
2.2.4 GMII/MII Management
ADMtek Inc.
2-6
Pin Name
BGA Ball
PQFP Pin#
Type Descriptions
MII Management for MII_0, and MII_1 port. All can be floated if no MII need.
MDC
L3
29
O
Clock input MDIO. It runs at a 1MHz
frequency clock for MII port auto-
negotiation result monitoring.
MDIO
L4
30
BI
Internal pull down. Bi-directional serial
pin used to write and read form the
registers of the device.