MC68030FE25C Freescale Semiconductor, MC68030FE25C Datasheet - Page 546
MC68030FE25C
Manufacturer Part Number
MC68030FE25C
Description
IC MPU 32BIT ENHANCED 132-CQFP
Manufacturer
Freescale Semiconductor
Specifications of MC68030FE25C
Processor Type
M680x0 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
132-CQFP
Family Name
M68000
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
25MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
5V
Operating Supply Voltage (max)
5.25V
Operating Supply Voltage (min)
4.75V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
132
Package Type
CQUAD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68030FE25C
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC68030FE25C
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
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MOTOROLA
The second section contains the memory devices. Eight devices are used,
for lower power consumption, the timing in this design will be preserved if
the memory's E signal is asserted before the falling edge of state SO (at the
The third section of the memory bank is the data buffers. The data buffers
write memory bank. The required parts include:
density. The most important feature of the memory devices used in this
design is the separate data-in and data-out pins, which allow the SRAMs to
contention. The enable pins on the SRAMs have been grounded for both
simplicity and .improved memory access timing. If the designer wishes to
same time as or before the address becomes valid). Two possible enable
circuits are shown in Figure 12-11.
are shown as 74F244, but 74AS244s may also be used. The RDCS signal,
qualified with AS, controls the data buffers during read operations as de-
scribed above.
To maximize performance, both read and write operations should be capable
of completing in two clock cycles. Figure 12-12 shows a two-clock read and
but some designs may wish to increase this to support EDAC or to increase
be enabled before address decode is complete without causing data bus
include some type of enable circuitry to take advantage of low bus utilization
(4)
(1)
(8)
(2)
(1)
(1)
(2)
(1)
vcc
ECS - -
74F244 buffers
74F32 OR gates
74F74 D-type flip-flop
74F373 transparent latches
74AS21 AND gate
74F04 inverter
PAL16L8D (or equivalent)
AS
16K×4 SRAMs, 25-ns access time with separate I/O pins
Figure 12-11. Additional Memory Enable Circuits
CLK[
VCC
p
74F74
MC68030 USER'S MANUAL
TERM
ECS - -
CLK
0
CLK[
VCC
g
74F74
12-21
12
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