MC68030CRC25C Freescale Semiconductor, MC68030CRC25C Datasheet - Page 149

• 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: -

6
6-12
p o r t size is 32 bits, the processor performs two accesses, one for each cache
With a 32-bit port, the same operation is shown in Figure 6-7. Only one read
cycle is required. All four bytes (including the requested byte) are latched
during the cycle.
controller attempts to fill both associated long-word cache entries. An ex-
The MC68030 first fetches the initial byte(s) of the operand (residing in the
first long word} and then requests the remaining bytes to fill that cache entry
If a requested access is misaligned and spans two cache entries, the bus
ample of this is an operand request for a long word on an odd-word boundary.
(if the port size is less than 32 bits) before it requests the remainder of the
operand and corresponding long word to fill the second cache entry. If the
entry.
CYCLE
CYCLE
2
1
WORD
BYTE
BYTE
SIZE
SIZE
Figure 6-6. Single Entry Mode Operation - - 16-Bit Port
Figure 6-7. Single Entry Mode Operation - - 32-Bit Port
ADDRESS
ADDRESS
$03
$00
$03
SOD
$00
MC68030 USER'S MANUAL
11111
$04
$04
- INCLUDES THE REQUESTED OPERAND AND THE PREVIOUS BYTE
- THE REMAINING WORD FOR THE LONG WORD CACHE ENTRY
- THE ENTIRE LONG WORD MUST BE VALID
$08
$08
COMMENT
COMMENT
$OC
$0C
MOTOROLA