MC68EC000EI12 Freescale Semiconductor, MC68EC000EI12 Datasheet - Page 393

• Manufacturer Part Number: MC68EC000EI12
• Description: IC MPU 32BIT 12MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor
• Series: 68K - M680X0r

Specifications of MC68EC000EI12

• Processor Type: M680x0 32-Bit
• Speed: 12MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Core Size: 32 Bit
• Cpu Speed: 12MHz
• Digital Ic Case Style: PLCC
• No. Of Pins: 68
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: 0°C To +70°C
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Clock Frequency: 12MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

FMOVEM
Operation:
Assembler
Syntax:
Attributes:
Description: Moves one or more 32-bit values into or out of the specified system control
MOTOROLA
registers. Any combination of the three system control registers may be specified. The
registers are always moved in the same order, regardless of the addressing mode
used; the floating-point control register is moved first, followed by the floating-point
status register, and the floating-point instruction address register is moved last. If a
register is not selected for the transfer, the relative order of the transfer of the other
registers is the same. The first register is transferred between the floating-point unit and
the specified address, with successive registers located up through higher addresses.
For the MC68881, this instruction does not cause pending exceptions (other than pro-
tocol violations) to be reported. Furthermore, a write to the floating-point control regis-
ter exception enable byte or the floating-point status register exception status byte
connot generate a new exception, despite the value written.
When more than one register is moved, the memory or memory- alterable addressing
modes can be used as shown in the addressing mode tables. If the addressing mode
is predecrement, the address register is first decremented by the total size of the reg-
ister images to be moved (i.e., four times the number of registers), and then the regis-
ters are transferred starting at the resultant address. For the postincrement addressing
mode, the selected registers are transferred to or from the specified address, and then
the address register is incremented by the total size of the register images transferred.
If a single system control register is selected, the data register direct addressing mode
may be used; if the only register selected is the floating-point instruction address reg-
ister, then the address register direct addressing mode is allowed. Note that if a single
register is selected, the opcode generated is the same as for the FMOVE single system
control register instruction.
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
Register List
Source
FMOVEM.L < list > , < ea >
FMOVEM.L < ea > , < list >
Size = (Long)
Move Multiple Floating-Point
Register List
Control Registers
(MC6888X, MC68040)
Destination
Floating Point Instructions
FMOVEM
5-91