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| 型號(hào)： | C3ENPB0-DS |
| 英文描述： | 4 Mbit (512 Kbit x 8) ZEROPOWER® SRAM |
| 中文描述： | ? - 3E的網(wǎng)絡(luò)處理器的數(shù)據(jù)資料硅修訂買0 |
| 文件頁數(shù)： | 43/114頁 |
| 文件大?。?/td> | 1893K |
| 代理商： | C3ENPB0-DS |
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Pin Descriptions Grouped by Function
43
MOTOROLA GENERAL BUSINESS INFORMATION
C3ENPA1-DS/D REV 03
Executive Processor
System Interface Signals
The XP
’
s system interface manages the supervisory controls for the network interfaces, as
well as the set of pins that provide interfaces to other components in the system that are
not memories or network interfaces. It is also the primary interface used for initializing the
C-3e NP after reset. The XP signals include PCI signals, Serial interface signals, and PROM
interface signals.
PCI Signals
The PCI can be configured to support a 32bit PCI capable of operating at either 33MHz or
66MHz. The PCI is fully compliant with PCI Specification revision 2.1.
Table15
describes
the PCI signals.
Table 15
PCI Signals
SIGNAL NAME
PIN #
TOTAL
TYPE
I/O
SIGNAL DESCRIPTION
PAD0 - PAD31
AB9, AC9, AE9, AF9, AB8, AC8,
AD8, AE8, AF8, AG8, AB7, AC7,
AD7, AE7, AF7, AG7, AB6, AC6,
AE6, AG6, AB5, AC5, AD5, AE5,
AF5, AG5, AB4, AD4, AF4, AG4,
AA3, AB3,
32
PCI
I/O
Multiplexed Address/Data Bus. These signals are
multiplexed address and data bits. The C-3e NP
receives addresses as target and drives addresses as
master. It drives the data and receives read data as
master.
PCBEX0 - PCBEX3
AB2, AG3, AF3, AE3
4
PCI
I/O
Command byte enables. These signals are
multiplexed command and byte enabled signals.
The C-3e NP
receives byte enables as target and drives
byte enables as master.
PPAR
AG1
1
PCI
I/O
Parity. This signal carries even parity for AD and CBE#
pins. It has the same receive and drive characteristics
as the address and data bus, except that it is one PCI
cycle later.
PFRAMEX
AA7
1
PCI
I/O
Cycle frame
PTRDYX
AB1
1
PCI
I/O
Target ready for data transfer
PIRDYX
AC2
1
PCI
I/O
Initiator ready for data transfer
PSTOPX
AE2
1
PCI
I/O
Target transaction stop request
PDEVSELX
AG2
1
PCI
I/O
Target device selected
PPERRX
AC3
1
PCI
I/O
Bus parity error
PSERRX
AD3
1
PCI
I/O
System error
PCLK
AF1
1
I
PD
PCI
I
Bus clock
PRSTX
AE1
1
I
Bus reset
PREQX
AD1
1
PCI
O
Initiator bus request (arbitration)
F
n
.
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