Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Transceiver Registers Page 434
EXPANSION REGISTER ACCESS REGISTER (PHY_ADDR = 0X1, REG_ADDR = 17H)
When enabled, this register serves as an index to the expansion registers. The value of the expansion register can be read/
written through register 15h (see “Expansion Register Access Data (PHY_ADDR = 01h, REG_ADDR = 15h)” on page 433).
These bits should be cleared when the Expansion Register is not accessed.
Table 496: Expansion Register Access Register (PHY_ADDR = 0x1, Reg_Addr = 17h)
Bit Field Description Init Access
15:12 Reserved – 0000 R/W
11:8 Expansion Register
Select
• 1111 = Expansion Register select
• XXXX = Reserved
0h
7:0 Expansion Register
Accessed
Sets the Expansion Register number accessed when
reading or writing “Expansion Register Access Data
(PHY_ADDR = 01h, REG_ADDR = 15h)” on page 433.
Table 497: Expansion Register Select Values
Expansion Register Register Name
00h “Expansion Register 00h: Receive/Transmit Packet Counter” on page 435
01h “Expansion Register 01h: Expansion Interrupt Status” on page 435
03h “Expansion Register 03h: SerDes Control” on page 436
04h “Expansion Register 04h: Multicolor LED Selector” on page 437
05h “Expansion Register 05h: Multicolor LED Flash Rate Controls” on page 438
06h “Expansion Register 06h: Multicolor LED Programmable Blink Controls” on page 439
10h “Expansion Register 10h: Cable Diagnostic Controls” on page 440
11h “Expansion Register 11h: Cable Diagnostic Results” on page 441
12h “Expansion Register 12h: Cable Diagnostic Lengths Channels 1/2” on page 442
13h “Expansion Register 13h: Cable Diagnostic Lengths Channels 3/4” on page 443
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