MC68EC000EI8 Freescale Semiconductor, MC68EC000EI8 Datasheet - Page 547

• Manufacturer Part Number: MC68EC000EI8
• Description: IC MPU 32BIT 85MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor
• Series: M68000r

Specifications of MC68EC000EI8

• Processor Type: M680x0 32-Bit
• Speed: 8MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Core Size: 32 Bit
• Cpu Speed: 8MHz
• 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: 8MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

TBLS
TBLSN
MOTOROLA
For register interpolate mode, the interpolation occurs using the Dym and Dyn registers
in place of the two table entries. For this mode, only the fractional portion, Dx 7 – 0, is
used in the interpolation, and the integer portion, Dx 15 – 8, is ignored. The register
interpolation mode may be used with several table lookup and interpolations to model
multidimensional functions.
Signed table entries range from – 2
range from 0 to 2
respectively.
Rounding of the result is optionally selected via the "R" instruction field. If R = 0
(TABLE), the fractional portion is rounded according to the round-to-nearest algorithm.
The following table summerizes the rounding procedure:
The adjusted difference is then added to the selected table entry. The rounded result
is returned in the destination data register, Dx. Only the portion of the register
corresponding to the selected size is affected.
WORD
LONG
BYTE
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
31
Table Lookup and Interpolate (Signed)
UNAFFECTED
UNAFFECTED
n – 1
RESULT
where n is 8, 16, or 32 for byte, word, and long-word tables,
Adjusted Difference
> – 1/2 and < 1/2
24
Fraction
– 1/2
1/2
23
UNAFFECTED
UNAFFECTED
RESULT
n – 1
(CPU32)
to 2
16
n – 1
– 1; whereas, unsigned table entries
15
Adjustment
Rounding
UNAFFECTED
RESULT
RESULT
– 1
+ 0
+ 1
8
7
CPU32 Instructions
RESULT
RESULT
RESULT
TBLSN
TBLS
0
7-7