MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 392

• Manufacturer Part Number: MC68EC000EI20
• Description: IC MPU 32BIT 20MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC000EI20

• Processor Type: M680x0 32-Bit
• Speed: 20MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

Floating Point Instructions
FMOVEM
5-90
An example of the calculation of this mask is as follows:
Upon return from a procedure, the restoration of the necessary registers follows the
same convention, and the register mask generated during the save operation on entry
is used to restore the required floating-point data registers:
Nested calling sequence...
Return to caller...
MOVE.W
OR.W
BSR
ADDQ.L
MOVE.B
FMOVEM
RTS
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
*
*
*
Move Multiple Floating-Point
UNSAVED (A7),D7 Load the list of active registers not
saved at entry.
#WILL_USE,D7
PROC_3
#2,A7
(A7) + ,D7
use byte).
(A7) + ,D7
(MC6888X, MC68040)
Data Registers
Combine with those active at this time
Discard the list of registers not saved.
Get the saved register list (pop word,
Restore the registers.
Return to the calling routine.
FMOVEM
MOTOROLA