converts, etc. In combination with its high throughput
fully pipelined floating-point execution unit, the
superscalar capability of the ACT5260 provides
unparalleled price/performance in computationally
intensive embedded applications.
ALU
The ACT5260 ALU consists of the integer adder/
subtractor, the logic unit, and the shifter. The adder
performs address calculations in addition to
arithmetic operations, the logic unit performs all
logical and zero shift data moves, and the shifter
performs shifts and store alignment operations. Each
of these units is optimized to perform all operations in
a single processor cycle
CPU Registers
Like all MIPS ISA processors, the ACT5260 CPU
has a simple, clean user visible state consisting of 32
general purpose registers, two special purpose
registers for integer multiplication and division, a
program counter, and no condition code bits.
For additional Detail Information regarding the
operation of the Quantum Effect Design (QED)
RISCMark
™
RM5260
™
,
64-Bit
Superscalar
Microprocessor see the latest QED datasheet
(Revision 1.1 July 1998).
Pipeline
For integer operations, loads, stores, and other
non-floating-point operations, the ACT5260 uses the
simple 5-stage pipeline also found in the circuits
R4600, R4700, and R5000. In addition to this
standard pipeline, the ACT5260 uses an extended
seven stage pipeline for floating-point operations.
Like the R5000, the ACT5260 does virtual to physical
translation in parallel with cache access.
Aeroflex Circuit Technology
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SCD5260 REV A 3/29/99 Plainview NY (516) 694-6700
Absolute Maximum Ratings
1
Symbol
V
TERM
Tc
T
BIAS
T
STG
I
IN
I
OUT
Rating
Terminal Voltage with respect to GND
Operating Temperature
Case Temperature under Bias
Storage Temperature
DC Input Current
DC Output Current
Range
-0.5
2
to 4.6
-55 to +125
-55 to +125
-55 to +125
20
3
50
Units
V
°C
°C
°C
mA
mA
Notes:
1. Stresses above those listed under "AbsoluteMaximums Rating" may cause permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2. V
IN
minimum = -2.0V for pulse width less than 15nS. V
IN
maximum should not exceed +5.5 Volts.
3. When V
IN
< 0V or V
IN
> Vcc.
4. No more than one output should be shorted at one time. Duration of the short should not exceed more than 30 second.
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
T
C
Parameter
Power Supply Voltage
Input High Voltage
Input Low Voltage
Operating Temperature Case
For 133MHz Parts only
Minimum
+3.135
0.7V
CC
-0.5
-55
-40
Maximum
+3.465
V
CC
+ 0.5
0.2V
CC
+125
+125
Units
V
V
V
°C
°C
DC Characteristics
(V
CC
= 3.3V ±5%; 133MHz parts: Tc =-40°C to +125°C, All other parts Tc =-55°C to +125°C)
Parameter
Output Low Voltage
Output High Voltage
Output Low Voltage
Output High Voltage
Input High Voltage
Input Low Voltage
Input Current
Input Current
Input Current
Input Capacitance
Output Capacitance
Sym
V
OL1
V
OH1
V
OL2
V
OH2
V
IH
V
IL
I
IN1
I
IN2
I
IN3
C
IN
C
OUT
V
IN
= 0V
V
IN
= V
CC
V
IN
= 5.5V
I
OL
= 20 µA
I
OL
= 20 µA
I
OL
= 4 mA
I
OL
= 4 mA
Conditions
100 / 133 / 150MHz
Min
-
Vcc - 0.1
-
2.4
0.7V
CC
-0.5
-20
-20
-250
-
-
Max
0.1
-
0.4
-
V
CC
+ 0.5
0.2V
CC
+20
+20
+250
10
10
Units
V
V
V
V
V
V
µA
µA
µA
pF
pF
Aeroflex Circuit Technology
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SCD5260 REV A 3/29/99 Plainview NY (516) 694-6700
Power Consumption
Parameter
Active Operating
Supply Current
Symbol
I
CC1
I
CC2
I
CC3
Standby Current
I
SB1
I
SB1
Conditions
C
L
= 0pF,
No SysAD activity
C
L
= 50pF, R4000 write
protocol without FPU operation
C
L
= 50pF, write re-issue or
pipelined writes
C
L
= 0pF
C
L
= 50pF
100MHz, 3.3V 133MHz, 3.3V 150MHz, 3.3V
Typ
5
800
1000
1100
75
75
Max
1550
1750
2000
150
150
Typ
5
800
1000
1100
75
75
Max
1550
1750
2000
150
150
Typ
5
1000
1150
1250
100
100
Max
1750
1950
2250
175
175
Units
mA
mA
mA
mA
mA
Notes:
5. Typical integer instruction mix and cache miss rates.
AC Characteristics
(V
CC
= 3.3V ±5%; 133MHz parts: Tc =-40°C to +125°C, All other parts Tc =-55°C to +125°C)
Capacitive Load Deration
100 / 133 / 150MHz
Symbol
C
LD
Load Derate
Parameter
Minimum
-
Maximum
2
ns/25pF
Units
Clock Parameters
100/133/150MHz
Parameter
SysClock High
SysClock Low
SysClock Frequency
6
SysClock Period
Clock Jitter for SysClock
SysClock Rise Time
SysClock Fall Time
ModeClock Period
JTAG Clock Period
t
SCP
t
JitterIn
t
SCRise
t
SCFall
t
ModeCKP
t
JTAGCKP
Symbol
t
SCHigh
t
SCLow
Transition < 5ns
Transition < 5ns
Test Conditions
Min
4
4
33
-
-
-
-
-
-
Max
-
-
75
30
±250
5
5
256*t
SCP
4*t
SCP
ns
ns
MHz
ns
ps
ns
ns
ns
ns
Units
Notes:
6. Operation of the ACT5260 is only guaranteed with the Phase Loop enabled.
Aeroflex Circuit Technology
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SCD5260 REV A 3/29/99 Plainview NY (516) 694-6700
System Interface Parameters
7
100MHz
Parameter
Data Output
8
t
DO
mode
14...13
= 00
mode
14...13
= 01 (slowest)
Data Setup
Data Hold
t
DS
t
DH
t
RISE
= 5ns
t
FALL
= 5ns
Symbol
Test Conditions
Min
mode
14...13
= 10 (fastest)
mode
14...13
= 11
1.0
1.0
1.0
1.0
5.0
2.0
Max
7.0
7.5
8.0
8.5
-
-
Min
1.0
1.0
1.0
1.0
5.0
2.0
Max
7.0
7.5
8.0
8.5
-
-
Min
1.0
1.0
1.0
1.0
5.0
2.0
Max
7.0
7.5
8.0
8.5
-
-
ns
ns
ns
ns
ns
ns
133MHz
150MHz
Units
Notes: -
7. Timmings are are measured from from 1.5V of the clock to 1.5V of the signal.
ADI参考电路
