MC68030FE20C Freescale Semiconductor, MC68030FE20C Datasheet - Page 417

• Manufacturer Part Number: MC68030FE20C
• Description: IC MPU 32BIT ENHANCED 132-CQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68030FE20C

• Processor Type: M680x0 32-Bit
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-CQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

10
10-30
10.3.3 Save CIR
10.3.2 Control CIR
the word at that offset. The 14 most significant bits of the word are undefined.
When the MC68030 receives one of the three take exception coprocessor
the abort (AB) bit, to the control CIR to abort any coprocessor instruction in
The coprocessor uses the 16-bit save CIR to communicate status and state
frame format information to the main processor while executing a cpSAVE
the cpSAVE instruction by the coprocessor. The offset from the base address
The main processor writes to the 2-bit control CIR to acknowledge copro-
cessor-requested exception processing or to abort the execution of a copro-
cessor instruction. The offset from the base address of the CIR set for the
control CIR is $02. The control CIR occupies the two least significant bits of
acknowledge mask (102) to the control CIR, which sets the exception ac-
knowledge (XA) bit. The MC68030 writes the abort mask (012), which sets
progress. (The most significant 14 bits of both masks are undefined.) The
MC68030 aborts a coprocessor instruction when it detects one of the follow-
ing exception conditions:
of the CIR set for the save CIR is $04. Refer to
MAT WORDS.
Figure 10-19 shows the format of this register.
response primitives, it acknowledges the primitive by writing the exception
instruction. The main processor reads the save CIR to initiate execution of
15
• An F-line emulator exception condition after reading a response primitive
• A format error exception when it receives an invalid format word or a
• A privilege violation exception as it performs a supervisor check in re-
sponse to a supervisor check primitive
valid format word that contains an invalid length
Figure 10-19. Control CIR Format
MC68030 USER'S MANUAL
(UNDEFINED, RESERVED)
10.2.3.2 COPROCESSOR FOR-
2
MOTOROLA
1
0