Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Transceiver Registers Page 464
Write Enable
During a write to this register, setting LED Selector 1 register bit 15 to a 1 allows writing to bits [7:0] of this register. For
reading the values of bits [9:0], perform an MDIO write with bit 15 set to a 0 and preferred shadow values in bits [14:10]. The
next MDIO read of register address 1Ch contains the preferred Shadow register values in bits [9:0].
Shadow Register Selector
Bits [14:10] of this register must be set to 01101 to enable read/write to the LED Selector register 1 address 1Ch.
LED2 Selector
Bits [7:4] of MII register 1Ch with shadow value 01101 select the LED2 output mode.
LED1 Selector
Bits [3:0] of MII register 1Ch with shadow value 01101 select the LED1 output mod.
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