MC68020RC16E Freescale Semiconductor, MC68020RC16E Datasheet - Page 120
MC68020RC16E
Manufacturer Part Number
MC68020RC16E
Description
IC MPU 32BIT 16MHZ 114-PGA
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68020EH16E.pdf
(306 pages)
Specifications of MC68020RC16E
Processor Type
M680x0 32-Bit
Speed
16MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
114-PGA
Family Name
M68000
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
16.67MHz
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
Through Hole
Pin Count
114
Package Type
CPGA
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:
MC68020RC16E
Manufacturer:
MOT
Quantity:
900
Company:
Part Number:
MC68020RC16E
Manufacturer:
MOT
Quantity:
900
Part Number:
MC68020RC16E
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
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5.7.2.3 BUS ARBITRATION CONTROL (MC68EC020). The bus arbitration control unit in
the MC68EC020 is implemented with a finite state machine. As discussed previously, all
asynchronous inputs to the MC68EC020 are internally synchronized in a maximum of two
cycles of the processor clock.
As shown in Figure 5-48, the input signal labeled R is an internally synchronized version
of the BR signal. The BG output is labeled G, and the internal high-impedance control
signal is labeled T. If T is true, the address, data, and control buses are placed in the high-
impedance state after the next rising edge following the negation of AS and RMC. All
signals are shown in positive logic (active high), regardless of their true active voltage
level.
MOTOROLA
Figure 5-48. MC68EC020 Bus Arbitration State Diagram
R—BUS REQUEST
G—BUS GRANT
T —THREE-STATE CONTROL TO BUS CONTROL LOGIC
X—DON'T CARE
X
Freescale Semiconductor, Inc.
STATE1
GT
STATE 2
R
For More Information On This Product,
GT
Go to: www.freescale.com
R
M68020 USER’S MANUAL
R
STATE 3
STATE 6
STATE 0
GT
GT
GT
R
R
R
X
R
X
STATE 4
STATE 5
GT
GT
R
5- 73
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