MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 378

• 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
FMOVE
Register-to-Memory Operation: Rounds the source operand to the size of the specified
5-76
destination format and stores it at the destination effective address. If the format of the
destination is packed decimal, a third operand is required to specify the format of the
resultant string. This operand, called the k-factor, is a 7-bit signed integer (twos
complement) and may be specified as an immediate value or in an integer data
register. If a data register contains the k-factor, only the least significant seven bits are
used, and the rest of the register is ignored.
Source Specifier field—Specifies the source register or data format.
Destination Register field—Specifies the destination floating- point data register.
Opmode field—Specifies the instruction and rounding precision.
0000000 FMOVE
1000000 FSMOVE Single-precision rounding specified.
1000100 FDMOVE Double-precision rounding specified.
If R/M = 0, specifies the source floating-point data register.
If R/M = 1, specifies the source data format:
*This encoding in the MC68040 will cause an unimplemented data type
000 — Long-Word Integer (L)
001 — Single-Precision Real (S)
010 — Extended-Precision Real (X)
011 — Packed-Decimal Real (P)*
100 — Word Integer (W)
101 — Double-Precision Real (D)
110 — Byte Integer (B)
exception to allow emulation in software.
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
Move Floating-Point Data Register
Rounding precision specified by the floating-point
control register.
(MC6888X, MC68040)
FMOVE
MOTOROLA