MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 71
MC68EC000EI20
Manufacturer Part Number
MC68EC000EI20
Description
IC MPU 32BIT 20MHZ 68-PLCC
Manufacturer
Freescale Semiconductor
Specifications of MC68EC000EI20
Processor Type
M680x0 32-Bit
Speed
20MHz
Voltage
3.3V, 5V
Mounting Type
Surface Mount
Package / Case
68-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
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Addressing Capabilities
After a put operation, the put address register points to the last item placed in the queue; the
unchanged get address register points to the last item removed from the queue. After a get
operation, the get address register points to the last item placed in the queue.
.
LOW MEMORY
(FREE)
PUT – (An)
LAST PUT
NEXT GET
GET – (Am)
LAST GET (FREE)
HIGH MEMORY
To implement the queue as a circular buffer, the get or put operation should be performed
first. Then the relevant address register should be checked and adjusted, if necessary.
Adding the buffer length (in bytes) to the address register contents adjusts the address
register.
2-30
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
MOTOROLA
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