MC68030FE33C Freescale Semiconductor, MC68030FE33C Datasheet - Page 426

• Manufacturer Part Number: MC68030FE33C
• Description: IC MPU 32BIT ENHANCED 132-CQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68030FE33C

• Processor Type: M680x0 32-Bit
• Speed: 33MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-CQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

MOTOROLA
t i a t i n g t h e i n s t r u c t i o n . T h e IA bit of this null p r i m i t i v e u s u a l l y s h o u l d be set
t o m i n i m i z e i n t e r r u p t l a t e n c y w h i l e t h e m a i n p r o c e s s o r is w a i t i n g f o r t h e
A c o p r o c e s s o r can be d e s i g n e d to e x e c u t e a cpGEN i n s t r u c t i o n c o n c u r r e n t l y
w i t h t h e e x e c u t i o n o f m a i n p r o c e s s o r i n s t r u c t i o n s and, also, b u f f e r o n e w r i t e
c o p r o c e s s o r i n s t r u c t i o n . T h i s p r i m i t i v e i n d i c a t e s t h a t t h e c o p r o c e s s o r is b u s y
c o p r o c e s s o r to c o m p l e t e t h e g e n e r a l c a t e g o r y i n s t r u c t i o n .
T a b l e 10-3 s u m m a r i z e s t h e e n c o d i n g s of t h e null p r i m i t i v e .
o p e r a t i o n to e i t h e r its c o m m a n d or c o n d i t i o n CIR. T h i s t y p e of c o p r o c e s s o r
issues a null p r i m i t i v e w i t h CA = 1 w h e n it is c o n c u r r e n t l y e x e c u t i n g a cpGEN
i n s t r u c t i o n , and t h e m a i n p r o c e s s o r i n i t i a t e s a n o t h e r g e n e r a l o r c o n d i t i o n a l
and t h e m a i n p r o c e s s o r s h o u l d read t h e r e s p o n s e CIR a g a i n w i t h o u t reini-
x= Don't Care
c= 1 or 0 Depending on Coprocessor Condition Evaluation
CA
x
0
0
0
1
1
PC
0
0
0
0
1
0
T a b l e 10-3. Null C o p r o c e s s o r R e s p o n s e P r i m i t i v e E n c o d i n g s
IA
x
0
0
x
1
1
PF
x
x
0
0
1
x
TF
x
x
c
c
c
x
MC68030 USER'S MANUAL
tion Address CIR, Clear PC Bit, and
Proceed with Operation Specified
by CA, IA, PF, and TF Bits
Service Pending Interrupts
Service Pending Interrupts and Same as General Category
If (Trace Pending) Reread Re- Main Processor Completes In-
sponse CIR; Else, Execute Next In- struction Execution Based on TF = c
struction
CIR; Else, Execute Next Instruction
Coprocessor Instruction Corn- Main Processor Completes In-
tions or Execute Next lnstruction TF=c.
Pass Program Counter to Instruc- Same as General Category
Reread Response CIR, Do Not Same as GeneraI Category
Reread the Response CIR
If(Trace Pending) Service Pending Main Processor Completes In-
Interrupts and Reread Response struction Execution Based on TF= c
31eted; Service Pending Excep- struction Execution Based on
General Instructions
Conditional Instructions
10-39
1(