Broadcom BCM5722 Programmer's Manual page 267

Programmer's Guide
10/15/07
Bit Description
18 LED polarity
17 BIST function control
16 Asynchronous BIST Reset
15 Register BIST select bit
(BCM5906 only)
Reserved (BCM5722,
BCM5755, BCM5755M,
BCM5756M, BCM5757,
BCM5754, BCM5787 only)
14 Reserved
13 Select Alt Clock Source
(BCM5722, BCM5755,
BCM5755M, BCM5756M,
BCM5757, BCM5754,
BCM5787 only)
Reserved (BCM5906 only)
12 Select Alt Clock (BCM5722,
BCM5755, BCM5755M,
BCM5756M, BCM5757,
BCM5754, BCM5787 only)
Reserved (BCM5906 only)
11:10 Reserved
9 Core Clock Disable (BCM5722,
BCM5755, BCM5755M,
BCM5756M, BCM5757,
BCM5754, BCM5787 only)
Reserved (BCM5906 only)
8 Reserved
7 M66EN
6:5 Reserved
4:0 Detected PCI Clock Speed
Document 5722-PG101-R
Table 129: PCI Clock Control Register (Cont.)
Description
When set to 1, changes the polarity of the 4 LEDs
Controls the BIST function
Resets the BIST
0: Selects EMAC TX_FIFO and WDMA FIFO
1: Selects EMAC RX_FIFO and RDMA FIFO
–
–
0: Alternate clock source = ck25 = (XTAL_IN)/2
1: Then alternate clock source = ck25 = MII_CLK/2
–
Uses the alternate clock as the clock reference for the
internal clocks, rather than the 62.5 MHz. In BCM5752,
this bit has no effect when TPM is enabled.
Disable the CORE CLK to all blocks.
Do not write to this bit in any conditions.
N/A for PCIe Device.
N/A for PCIe Device.
Bro adco m Co rp or atio n
Init
0
0
0
0
0
0
0
0
Broadcom Vendor-Specific Capabilities
BCM5722
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Page 208