MC68030CRC25C Freescale Semiconductor, MC68030CRC25C Datasheet - Page 85

• Manufacturer Part Number: MC68030CRC25C
• Description: IC MPU 32BIT ENHANCED 128-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68030CRC25C

• Processor Type: M680x0 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 128-PGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

2
2-40
After a "put" operation, the "put" address register points to the last item
To implement the queue as a circular buffer, the "get" or "put" operation
checked and adjusted, if necessary. The address register is adjusted by adding
the buffer length (in bytes) to the register contents.
To implement the queue as a circular buffer, the relevant address register
To implement growth of the queue from high to low memory, use:
placed in the queue, and the unchanged "get" address register points to the
"put"
illustrated as:
should be performed first, and then the relevant address register should be
should be checked and adjusted, if necessary, before performing the
or "get" operation. The address register is adjusted by subtracting the buffer
length (in bytes) from the register.
last item removed from the queue. After a
register points to the last item removed from the queue, and the unchanged
-(Am) to get data from the queue.
-(An) to put data into the queue,
address register points to the last item placed in the queue. This is
GET -(Am)
PUT -(An)
MC68030 USER'S MANUAL
LAST GET (FREE)
HIGH MEMORY
LOW MEMORY
NEXT GET
LAST PUT
(FREE)
"get"
operation, the
"get"
MOTOROLA
address
"put"