參數(shù)資料
型號(hào)： IDT79RC64V474200DZ
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 微控制器/微處理器
英文描述： RISControllerTM Embedded 64-bit Microprocessor, based on RISCore4000
中文描述： 64-BIT, 200 MHz, RISC PROCESSOR, PQFP128
封裝： QFP-128
文件頁(yè)數(shù)： 6/25頁(yè)
文件大小： 403K
代理商： IDT79RC64V474200DZ
6 of 25
April 10, 2001
RC64474 RC64475
Power Management
Executing the WAIT instruction enables the processor to enter
Standby mode. The internal clocks will shut down, thus freezing the
pipeline. The PLL, internal timer, and some of the input pins (Int[5:0]*
NMI* ExtReq* Reset* and ColdReset* will continue to run. Once the
CPU is in Standby Mode, any interrupt, including the internally gener-
ated timer interrupt, will cause the CPU to exit Standby Mode.
T hermal Considerations
The RC64474/475 come in a QFP with a drop-in heat spreader and
are guaranteed in a case temperature range of 0
°
to +85
°
C, for
commercial temperature devices; - 40
°
to +85
°
for industrial tempera-
ture devices. The type of package, speed (power) of the device, and
airflow conditions affect the equivalent ambient temperature conditions
that will meet this specification.
The equivalent allowable ambient temperature, T
A
, can be calculated
using the thermal resistance fromcase to ambient (
CA
) of the given
package. The following equation relates ambient and case tempera-
tures:
T
A
= T
C
- P *
CA
where P is the maximumpower consumption at hot temperature,
calculated by using the maximumI
CC
specification for the device.
Typical values for
CA
at various airflows are shown in Table 4. Note
that the RC64474/475 processors implement advanced power manage-
ment, which substantially reduces the typical power dissipation of the
device.
Data S heet Revision History
December 1998:
Changed ordering code on 128-pin package from
DQ / DQI (Industrial) to DZ / DZI (Industrial).
January 1999:
Removed 5V tolerance capability and deleted 5V
tolerant pin.
February 1999:
Changed the package drawings to reflect the new
208-pin DP (DPI) and 128-pin DZ (DZI) packages.
May 1999:
Removed “Prelimnary” status fromdata sheet.
Changes in DC Electrical Characteristics table. Changes in Pin
Description table. Changes in Clock Parameters table. Changes in
SystemInterface Parameters table.
September 1999:
Updated Revision History section.
CA
Airflow (ft/min)
0
200
400
600
800
1000
128 QFP
16
10
9
7
6
5
208 QFP
20
13
10
9
8
7
Table 4 Thermal Resistance (
CA) at Various Airflows
January 17, 2000:
Added “with DSP extensions” in the CPU row
under RC64574 and RC64575 columns in Table 1. Added “l(fā)ockable by
line” in the Caches row under RC64574 and RC64575 columns in Table
1. Revised Data Output and Data Output Hold rows in SystemInterface
Parameters table.
February 10, 2000:
Revised values in Table 4, Thermal Resistance.
Old values were:
March 13, 2000:
Replaced existing figure in Mode Configuration
Interface Reset Sequence section with 3 reset figures.
March 28, 2000:
Removed the symbol t
DZ
fromFigure 3.
April 17, 2000
: Changed V
IH
value in 200MHz column from2.0V to
0.7V
CC
.
April 10, 2001
: In the Data Output and Data Output Hold categories
of the SystemInterface Parameters table, changed values in the Mn
column for all speeds from1.0 to 0. Deleted Output for Loading AC
Testing diagramand added Output Loading for AC Timng diagram
(Figure 8).
CA
Airflow (ft/min)
0
200
400
600
800
1000
128 QFP
20
12
9
8
7
6
208 QFP
20
12
9
8
7
6
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