Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Transceiver Registers Page 438
In Phase
When both MULTICOLOR[2:1] are set to the same mode, the outputs of MULTICOLOR[1] and MULTICOLOR[2] both toggle
at the same time. This bit determines whether the LEDs are identical to each other or inverse from each other. When the
two LED pins are attached to a special multicolored LED, the resulting LED color alternates between Off/Amber (In Phase)
or Red/Green (Out of Phase).
MULTICOLOR[2] Multicolor Selector
Bits [7:4] select the multicolor LED mode for MULTICOLOR[2]. It is up to the user to determine what functions should appear
on the two LED pins. For example, if the user wants a different color toggling operation other than the operation mentioned
above, such as Red/Amber, the user can put one of the Multicolor selectors to the desired toggle mode and the other
Multicolor selector to Forced On.
MULTICOLOR[1] Multicolor Selector
Bits [3:0] select the Multicolor LED mode for MULTICOLOR[1]. It is up to the user to determine what functions should appear
on the two LED pins. For example, if the user wants a different color toggling operation other than the operation mentioned
above, such as Red/Amber, the user can put one of the Multicolor selectors to the desired toggle mode and the other
Multicolor selector to Forced On.
EXPANSION REGISTER 05H: MULTICOLOR LED FLASH RATE CONTROLS
The following expansion registers are enabled by writing to “Expansion Register Access Register (PHY_ADDR = 0x1,
Reg_Addr = 17h)” on page 434 bits [11:0] = F05h, and read/write access is through register 15h.
Table 502: Expansion Register 05h: Multicolor LED Flash Rate Controls
Bit Field Description Init Access
15:12 Reserved Write as 0h, ignore on read. 0h R/W
11:6 Alternating Rate Determines the width and gap for Multicolor LED selector
0110 (Alternating LED mode).
• 00h = 21 ms width, 21 ms gap.
• 01h = 42 ms width, 42 ms gap.
• 02h = 63 ms width, 63 ms gap.
• ...
• 07h = 168 ms width, 168 ms gap.
• ...
• 3Fh = 1.344s.
07h R/W
5:0 Flash Rate Determines the width and minimum gap of every flash
pulse for Multicolor LED selector 0000 (Encoded Link/
Activity mode), 0010 (Activity Flash mode) and 0111
(Flashing LED mode).
• 00h = 21 ms width, 21 ms gap.
• 01h = 42 ms width, 42 ms gap.
• 02h = 63 ms width, 63 ms gap.
• ...
• 3Fh = 1.344s.
01h R/W
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