MC68040FE33A Freescale Semiconductor, MC68040FE33A Datasheet - Page 405

IC MICROPROCESSOR 32BIT 184-CQFP

MC68040FE33A

Manufacturer Part Number
MC68040FE33A
Description
IC MICROPROCESSOR 32BIT 184-CQFP
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC68040FE33A

Processor Type
M680x0 32-Bit
Speed
33MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
184-CQFP
Package
184CQFP
Processor Series
M680xx
Core
CPU32
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
 Details

Available stocks

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Part Number
Manufacturer
Quantity
Price
Part Number:
MC68040FE33A
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Resetting the processor causes any bus cycle in progress to terminate as if TA or TEA
had been asserted. In addition, the processor initializes registers appropriately for a reset
exception. When a RESET instruction is executed, the processor drives the reset out
(RSTO) signal for 512 BCLK cycles. In this case, the processor resets the external devices
of the system, and the internal registers of the processor are unaffected. The external
devices connected to the RSTO signal are reset at the completion of the RESET
instruction. An RSTI signal that is asserted to the processor during execution of a RESET
instruction immediately resets the processor and causes the RSTO signal to negate.
RSTO can be logically ANDed with the external signal driving RSTI to derive a system
reset signal that is asserted for both an external processor reset and execution of a
RESET instruction. It is necessary that the MC68040V and MC68EC040V be powered up
before other 5V devices; because the two power supplies must be within 2.5V of each
other.
C.5 POWER CYCLING
In cases were power is cycled off, then on with a duration of one second, RESET must be
asserted prior to removing power. This allows for an orderly shutdown within the
MC68040V and enables circuitry for the subsequent power-up.
MOTOROLA
NOTE: * Not on MC68EC040V.
CDIS, MDIS*,
IPL2–IPL0
SIGNALS
BCLK
RSTI
BUS
TIP
BR
BG
TS
BB
MI
Figure C-3. MC68040V and MC68EC040V Normal Reset Timing
Freescale Semiconductor, Inc.
For More Information On This Product,
CLOCKS
t 10
>
Go to: www.freescale.com
M68040 USER’S MANUAL
CLOCKS
2
CLOCKS
128
C-9

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