參數(shù)資料
型號(hào)： IDT79RC64T574-200DZ
廠商： IDT, Integrated Device Technology Inc
文件頁(yè)數(shù)： 26/28頁(yè)
文件大?。?/td> 0K
描述： IC MPU 64BIT EMB 200MHZ 128-QFP
標(biāo)準(zhǔn)包裝： 24
處理器類型： RISC 64-位
速度： 200MHz
電壓： 2.5V
安裝類型： 表面貼裝
封裝/外殼： 128-BQFP 裸露焊盤
供應(yīng)商設(shè)備封裝： 128-PQFP（28x28）
包裝： 托盤
其它名稱： 79RC64T574-200DZ
7 of 28
December 14, 2001
79RC64574 79RC64575
Pin Description Table
The following is a list of system interface pins available on the RC64574/575. Pin names ending with an asterisk (*) are active when low.
Pin Name
Type
Description
System Interface
ExtRqst*
I
External request
An external agent asserts ExtRqst* to request use of the System interface. The processor grants the request
by asserting Release*.
Release*
O
Release interface
In response to the assertion of ExtRqst* or a CPU read request, the processor asserts Release* and signals
to the requesting device that the system interface is available.
RdRdy*
I
Read Ready
The external agent asserts RdRdy* to indicate that it can accept a processor read request.
WrRdy*
I
Write Ready
An external agent asserts WrRdy* when it can now accept a processor write request.
ValidIn*
I
Valid Input
Signals that an external agent is now driving a valid address or data on the SysAD bus and a valid command
or data identifier on the SysCmd bus.
ValidOut*
O
Valid Output
Signals that the processor is now driving a valid address or data on the SysAD bus and a valid command or
data identifier on the SysCmd bus.
SysAD(63:0)
I/O
System address/data bus
A 64-bit address and data bus for communication between the processor and an external agent. In 64 bit
interface mode, during address phases only, SysAd(35:0) contains invalid address information. The remain-
ing SysAD(63:36) pins are not used. The whole 64-bit SysAD(63:0) may be used during the data transfer
phase. For all double-word accesses (read or write), the low-order 3 bits (SysAD[2:0]) will always be output as
zero during the address phase.
In 32-bit interface mode and in the RC64574, SysAD(63:32) is not used, regardless of Endianness. A 32-bit
address and data communication between processor and external agent is performed via SysAD(31:0).
SysADC(7:0)
I/O
System address/data check bus
An 8-bit bus containing parity check bits for the SysAD bus during data bus cycles.
In 32-bit mode and in the RC64574, SysADC(7:4) is not used. The SysADC(3:0) contains check bits for
SysAD(31:0).
SysCmd(8:0)
I/O
System command/data identifier bus
A 9-bit bus for command and data identifier transmission between the processor and an external agent.
SysCmdP
I/O
System Command Parity
A single, even-parity bit for the Syscmd bus. This signal is always driven low.
Clock/Control Interface
SysClock
I
SystemClock
The system clock input establishes the processor and bus operating frequency. It is multiplied internally by
2,3,4,5,6,7, or 8 to generate the pipeline clock (PClock).
VCCPI
Quiet VCC for PLL
Quiet VCC for the internal phase locked loop.
VSSPI
Quiet VSS for PLL
Quiet VSS for the internal phase locked loop.
Table 5 Pin Descriptions (Page 1 of 2)
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