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RELEASED
DATA SHEET
PM7366 FREEDM-8
ISSUE 4
PMC-1970930
FRAME ENGINE AND DATA LINK MANAGER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA,INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
15
Table 2 – PCI Host Interface Signals (51)
Pin No.
Pin Name
Type
-PI
-BI
Function
PCICLK
Input
B17
C4
The PCI clock signal (PCICLK) provides timing for
PCI bus accesses. PCICLK is a nominally 50% duty
cycle, 0 to 33 MHz clock.
PCICLKO
Output
C17
D5
The PCI clock output signal (PCICLKO) is a buffered
version of the PCICLK. PCICLKO may be used to
drive the SYSCLK input.
AD[0]
AD[1]
AD[2]
AD[3]
AD[4]
AD[5]
AD[6]
AD[7]
AD[8]
AD[9]
AD[10]
AD[11]
AD[12]
AD[13]
AD[14]
AD[15]
AD[16]
AD[17]
AD[18]
AD[19]
AD[20]
AD[21]
AD[22]
AD[23]
AD[24]
AD[25]
AD[26]
AD[27]
AD[28]
AD[29]
AD[30]
I/O
U19
U18
T17
U20
T18
T19
T20
R18
R20
P18
P19
P20
N18
N19
N20
M17
J19
J18
J17
H20
H19
H18
G20
G19
F19
E20
G17
F18
E19
D20
E18
U3
T4
U2
U1
T3
R4
T2
T1
R2
R1
P3
N4
P2
P1
N3
N2
J2
J3
H2
J4
H3
G1
G2
H4
F2
F3
E1
E2
F4
E3
D1
The PCI address and data bus (AD[31:0]) carries the
PCI bus multiplexed address and data. During the
first clock cycle of a transaction, AD[31:0] contains a
physical byte address. During subsequent clock
cycles of a transaction, AD[31:0] contains data.
A transaction is defined as an address phase followed
by one or more data phases. When Little-Endian
byte formatting is selected, AD[31:24] contain the
most significant byte of a DWORD while AD[7:0]
contain the least significant byte. When Big-Endian
byte formatting is selected. AD[7:0] contain the most
significant byte of a DWORD while AD[31:24] contain
the least significant byte. When the FREEDM-8 is the
initiator, AD[31:0] is an output bus during the first
(address) phase of a transaction. For write
transactions, AD[31:0] remains an output bus for the
data phases of the transaction. For read
transactions, AD[31:0] is an input bus during the data
phases.
When the FREEDM-8 is the target, AD[31:0] is an
input bus during the first (address) phase of a
transaction. For write transactions, AD[31:0] remains
an input bus during the data phases of the
transaction. For read transactions, AD[31:0] is an
output bus during the data phases.
When the FREEDM-8 is not involved in the current
transaction, AD[31:0] is tri-stated.