MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 451
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MC68EC000EI20
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
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FTST
MOTOROLA
R/M field—Specifies the source operand address mode.
Source Specifier field—Specifies the source register or data format.
Destination Register field—Since the floating-point unit uses a common command
0 — The operation is register to register.
1 — The operation is < ea > to register.
If R/M = 0, specifies the source floating-point data register.
If R/M = 1, specifies the source data format:
*This encoding will cause an unimplemented data type exception in the
word format for all of the arithmetic instructions (including FTST), this field is
treated in the same manner for FTST as for the other arithmetic instructions, even
though the destination register is not modified. This field should be set to zero to
maintain compatibility with future devices; however, the floating-point unit does
not signal an illegal instruction trap if it is not zero.
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)
MC68040 to allow emulation in software.
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
Test Floating-Point Operand
(MC6888X, MC68040)
Floating Point Instructions
FTST
5-149
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