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參數(shù)資料
| 型號： | RM7000-300S |
| 廠商： | PMC-Sierra, Inc. |
| 英文描述： | RM7000⑩ Microprocessor with On-Chip Secondary Cache Datasheet Released |
| 中文描述： | RM7000⑩微處理器與片上二級高速緩存數(shù)據(jù)發(fā)布 |
| 文件頁數(shù)： | 37/54頁 |
| 文件大小： | 901K |
| 代理商： | RM7000-300S |
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Proprietary and Confidential to PMC-Sierra, Inc and for its Customer
’
s Internal Use
Document ID: PMC-2002175, Issue 1
37
RM7000
Microprocessor with On-Chip Secondary Cache Datasheet
Released
Table 15 Interrupt Vector Spacing
ICR[4..0]
0x0
0x1
0x2
0x4
0x8
0x10
others
4.36 Standby Mode
The RM7000 provides a means to reduce the amount of power consumed by the internal core
when the CPU would not otherwise be performing any useful operations. This state is known as
Standby Mode.
Executing the
WAIT
instruction enables interrupts and enters Standby Mode. When the
WAIT
instruction completes the W pipe stage, if the
SysAD
bus is currently idle, the internal processor
clocks will stop thereby freezing the pipeline. The phase lock loop, or PLL, internal timer/counter,
and the
“
wake up
”
input pins:
INT[9:0]*
,
NMI*
,
ExtReq*
,
Reset*
, and
ColdReset*
continue to
operate in their normal fashion. If the
SysAD
bus is not idle when the WAIT instruction completes
the W pipe stage, then the
WAIT
is treated as a
NOP
. Once the processor is in Standby, any
interrupt, including the internally generated timer interrupt, will cause the processor to exit
Standby and resume operation where it left off. The
WAIT
instruction is typically inserted in the
idle loop of the operating system or real time executive.
4.37 JTAG Interface
The RM7000 interface supports JTAG boundary scan in conformance with IEEE 1149.1. The
JTAG interface is especially helpful for checking the integrity of the processor
’
s pin connections.
4.38 Boot-Time Options
Fundamental operational modes for the processor are initialized by the boot-time mode control
interface. The boot-time mode control interface is a serial interface operating at a very low
frequency (SysClock divided by 256). The low frequency operation allows the initialization
information to be kept in a low cost EPROM; alternatively the twenty or so bits could be generated
by the system interface ASIC.
Immediately after the
VccOK
signal is asserted, the processor reads a serial bit stream of 256 bits
to initialize all the fundamental operational modes. ModeClock runs continuously from the
assertion of
VccOK
.
4.39 Boot-Time Modes
The boot-time serial mode stream is defined in Table 16. Bit 0 is the bit presented to the processor
when
VccOK
is de-asserted; bit 255 is the last.
Spacing
0x000
0x020
0x040
0x080
0x100
0x200
reserved
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RM7000-300T | 制造商:QED 功能描述: 制造商:QED 功能描述:Microprocessor, 64 Bit, 304 Pin, Plastic, BGA |
| RM7000A | 制造商:PMC 制造商全稱:PMC 功能描述:64-Bit MIPS RISC Microprocessor with Integrated L2 Cache |
| RM7000A-300T | 制造商:Quantum Effect Devices 功能描述:64-BIT, 300 MHz, MICROPROCESSOR, 304 Pin Plastic BGA |
| RM7000A-350T | 制造商:PMC-Sierra 功能描述:Microprocessor, 64 Bit, 304 Pin, Plastic, BGA |
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