MC68030RC25C Freescale Semiconductor, MC68030RC25C Datasheet - Page 359

• Manufacturer Part Number: MC68030RC25C
• Description: IC MPU 32BIT ENHANCED 128-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68030RC25C

• 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: -

9-58
Read/Write (R/W)
Read/Write Mask (RWM)
Function Code Base (FC BASE)
Function Code Mask (FC MASK)
LOGICAL ADDRESS BASE
Cache Inhibit (Cl)
This bit defines the type of access that is transparently translated (for a
This bit masks the R/W field:
When RWM is set to one, both read and write accesses of a matching
the RWM bit equals zero, neither the read nor the write of any read-modify-
write cycle is transparently translated with the TTx register.
This 3-bit field defines the base function code for accesses to be trans-
translated.
This 3-bit field contains a mask for the FC BASE field. Setting a bit in this
field causes the corresponding bit of the FC BASE field to be ignored.
This 8-bit field is compared with address bits A31-A24. Addresses that
translated.
This bit inhibits caching for the transparent block:
When this bit is set, the contents of a matching address are not stored in
the internal instruction or data cache. Additionally, the cache inhibit out
signal (CLOUT) is asserted when this bit is set, and a matching address is
matching address):
address are transparently translated. For transparent translation of read-
parently translated with this register. Addresses with function codes that
match the FC BASE field (and are otherwise eligible) are transparently
accessed, signaling external caches to inhibit caching for those accesses.
modify-write cycles with matching addresses, RWM must be set to one. If
match in this comparison (and are otherwise eligible) are transparently
0 - - Write accesses transparent
0 - - R/W field used
0 - - Caching allowed
1 - - Read accesses transparent
1 - - Caching inhibited
1 - - R/W field ignored
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