LSI53C825AJ LSI, LSI53C825AJ Datasheet - Page 77
LSI53C825AJ
Manufacturer Part Number
LSI53C825AJ
Description
Manufacturer
LSI
Datasheet
1.LSI53C825AJ.pdf
(306 pages)
Specifications of LSI53C825AJ
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3.1.2 Address and Data Signals
Table 3.3
Name
AD[31:0]
C_BE[3:0]/
PAR
150, 151, 153,
154, 156, 157,
159, 160, 3, 5,
6, 7, 9, 11, 12,
13, 28, 29, 30,
32, 34, 35, 36,
38, 40, 41, 43,
44, 46, 47, 49,
Address and Data Signals
1, 15, 26, 39
Pin No.
50
25
Table 3.3
PCI Bus Interface Signals
Type Description
T/S
T/S
T/S
describes the signals for the Address and Data Signals group:
Physical longword Address and Data are multiplexed on the
same PCI pins. During the first clock of a transaction,
AD[31:0] contain a physical address. During subsequent clocks,
AD[31:0] contain data. A bus transaction consists of an address
phase, followed by one or more data phases. PCI supports both
read and write bursts. AD[7:0] define the least significant byte,
and AD[31:24] define the most significant byte.
Bus Command and Byte Enables are multiplexed on the same
PCI pins. During the address phase of a transaction,
C_BE[3:0]/ define the bus command. During the data phase,
C_BE[3:0]/ are used as byte enables. The byte enables
determine which byte lanes carry meaningful data. C_BE(0)/
applies to byte 0, and C_BE(3)/ to byte 3.
Parity is the even parity bit that protects the AD[31:0] and
C_BE[3:0]/ lines. During address phase, both the address and
command bits are covered. During data phase, both data and
byte enables are covered.
3-7
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