Intel CONTROLLERS 413808 - Manual (Page 766)

Intel ® 413808 and 413812—Clocking and Reset
Intel ® 413808 and 413812 I/O Controllers in TPER Mode
Developer’s Manual October 2007
766 Order Number: 317805-001US
17.1.1.2.2 cPCI Hot-Swap Mode (PCIX_EP# = ‘0’ and HS_SM# = ‘0’)
When operating in a Compact PCI Hot-Swap environment ( HS_SM# =0,
PCIX_EP# =0), the HS_FREQ[1:0] and P_M66EN pins are used to determine PCI
Bus operating frequency and set default value in ATUX PCSR[19:16]. Inputs are
sampled at trailing edge of reset and used to set dividers on region 2 PLL.
17.1.1.2.3 End Point Mode (PCIX_EP# = 0 and HS_SM# = 1)
When operating in end point mode, the setting of PCSR[19:16] is determined by the
initialization pattern sampled off the PCI bus.
Table 508. HS_FREQ Encoding
a
a. Hot-Swap is not supported in PCI-X Mode 2.
HS_FREQ[1:0] P_M66EN Operating Mode Bus Frequency PCSR[19:16]
11 0 PCI 33 MHz 1111
11 1 PCI 66 MHz 1111
10 – PCI-X (Mode 1) 66 MHz 1110
01 – PCI-X (Mode 1) 100 MHz 1101
00 – PCI-X (Mode 1) 133 MHz 1100
Table 509. PCI-X Initialization Pattern
1
PERR# DEVSEL# STOP# TRDY#
ATUX
PCSR[19:16]
Mode
Clock Frequency (MHz)
Minimum Maximum
Deasserted Deasserted Deasserted Deasserted
1111 PCI 33 16 33
1111 PCI 66 33 66
Deasserted Deasserted Deasserted Asserted 1110 PCI-X 66 Mode 1 50 66
Deasserted Deasserted Asserted Deasserted 1101 PCI-X100 Mode 1 66 100
Deasserted Deasserted Asserted Asserted 1100 PCI-X 133 Mode 1 100 133
Deasserted Asserted Deasserted Deasserted
Reserved
PCI-X Mode 1
Reserved
Deasserted Asserted Deasserted Asserted PCI-X Mode 1
Deasserted Asserted Asserted Deasserted PCI-X Mode 1
Deasserted Asserted Asserted Asserted PCI-X Mode 1
Asserted Deasserted Deasserted Deasserted PCI-X (Mode 2)
Asserted Deasserted Deasserted Asserted 0110 PCI-X 66 (Mode 2) 50 66
Asserted Deasserted Asserted Deasserted 0101 PCI-X 100 (Mode 2) 66 100
Asserted Deasserted Asserted Asserted 0100 PCI-X 133 (Mode 2) 100 133
Asserted Asserted Deasserted Deasserted
Reserved
PCI-X
Reserved
Asserted Asserted Deasserted Asserted PCI-X
Asserted Asserted Asserted Deasserted PCI-X
Asserted Asserted Asserted Asserted PCI-X
1. 81348 supports neither PCI-X 533 Mode nor ECC in Mode 1.