MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 553
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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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TBLU
TBLUN
Condition Codes:
MOTOROLA
For all sizes, the 8-bit fractional portion of the result is returned in the low byte of the
data register, Dx 7 – 0. User software can make use of the fractional data to reduce
cumulative errors in lengthy calculations or implement rounding algorithms different
from that provided by other forms of TBLU. The previously described assumed radix
point places two restrictions on the programmer:
X — Not affected.
N — Set if the most significant bit of the result is set; cleared otherwise.
Z — Set if the result is zero; cleared otherwise.
C — Always cleared.
V
1. Tables are limited to 257 entries in length.
2. Interpolation resolution is limited to 1/256, the distance between consecutive ta-
—
X
— Set if the integer portion of an unrounded long result is not in the range, – (2
ble entries. The assumed radix point should not, however, be construed by the
programmer as a requirement that the independent variable be calculated as a
fractional number in the range 0 X 255. On the contrary, X should be consid-
ered to be an integer in the range 0 X
ally a compressed representation of a linearized function in which only every
256th value is actually stored in memory.
WORD
LONG
BYTE
The long-word result contains only the least significant 24 bits of
integer precision.
N
Result
Table Lookup and Interpolation (Unsigned)
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
SIGN-EXTENDED
SIGN-EXTENDED
31
Z
RESULT
(2
V
23
) – 1; cleared otherwise.
24
C
0
SIGN-EXTENDED
23
RESULT
RESULT
(CPU32)
NOTE
16
65535, realizing that the table is actu-
15
RESULT
RESULT
RESULT
8
7
CPU32 Instructions
FRACTION
FRACTION
FRACTION
TBLUN
TBLU
0
7-13
23
)
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