MC68340AG25E Freescale Semiconductor, MC68340AG25E Datasheet - Page 171
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MC68340AG25E
Manufacturer Part Number
MC68340AG25E
Description
IC MPU 32BIT 25MHZ 144-LQFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68340FE25E.pdf
(441 pages)
Specifications of MC68340AG25E
Processor Type
M683xx 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
144-LQFP
Controller Family/series
68K
Core Size
32 Bit
No. Of I/o's
16
Cpu Speed
25MHz
No. Of Timers
2
Embedded Interface Type
UART
Digital Ic Case Style
LQFP
Rohs Compliant
Yes
Processor Series
M683xx
Core
CPU32
Maximum Clock Frequency
25 MHz
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68340AG25E
Manufacturer:
Freescale Semiconductor
Quantity:
135
Company:
Part Number:
MC68340AG25E
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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The following value has been calculated for independent variable X:
Since X is an 8-bit value, the upper four bits are used as a table offset and the lower four
bits are used as an interpolation fraction. The following results are obtained from the
subroutine:
Thus, Y is calculated as follows:
If the 8-bit value for X were used directly by the table instruction, interpolation would be
incorrectly performed between entries 0 and 1. Data must be shifted to the left four places
before use:
The new range for X is 0
digits of the word with zeros, the interpolation fraction can only have one of 16 values.
After the shift operation, Dx contains the following value:
Execution of the table instruction using the new value in Dx yields:
Thus, Y is calculated as follows:
5.3.4.4 TABLE EXAMPLE 4: MAINTAINING PRECISION. In this example, three TBL
operations are performed and the results are summed. The calculation is done once with
the result of each TBL rounded before addition and once with only the final result rounded.
Assume that the result of the three interpolations are as follows (a ".'' indicates the binary
radix point).
5-34
31
31
NOT USED
NOT USED
Interpolation Fraction
Table Entry Offset
Interpolation Fraction
Freescale Semiconductor, Inc.
Table Entry Offset
For More Information On This Product,
TBL # 1
TBL# 2
TBL # 3
Y = 80
X
Y = 80
4096; however, since a left shift fills the least significant
MC68340 USER’S MANUAL
Go to: www.freescale.com
(208 (64 – 80)) / 256 = 67
(13 (64 – 80)) / 16 = 67
LSL.W #4, Dx
16
16
0010 0000 . 0111 0000
0011 1111 . 0111 0000
0000 0001 . 0111 0000
Dx [8:15] = $0B = 11
15
15
0
0
Dx [0:7] = $D0 = 208
Dx [4:7] = $B = 11
0
0
Dx [0:3] = $D = 13
0
0
0
0
0
1
0
0
0
1
0
1
1
1
0
1
1
0
1
1
MOTOROLA
1
0
1
0
0
0
0
1
0
0
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