MC68340AG16E Freescale Semiconductor, MC68340AG16E Datasheet - Page 169

• Manufacturer Part Number: MC68340AG16E
• Description: IC MPU 32BIT 16MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68340AG16E

• Processor Type: M683xx 32-Bit
• Speed: 16MHz
• 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: 16MHz
• No. Of Timers: 2
• Embedded Interface Type: UART
• Digital Ic Case Style: LQFP
• Rohs Compliant: Yes
• Processor Series: M683xx
• Core: CPU32
• Maximum Clock Frequency: 16 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

Since the table is reduced from 257 to 5 entries, independent variable X must be scaled
appropriately. In this case the scaling factor is 64, and the scaling is done by a single
instruction:
Thus, Dx now contains the following bit pattern:
Using this information, the table instruction calculates dependent variable Y:
The function chosen for Examples 1 and 2 is linear between data points. If another
function had been been used, interpolated values might not have been identical.
5.3.4.3 TABLE EXAMPLE 3: 8-BIT INDEPENDENT VARIABLE. This example shows
how to use a table instruction within an interpolation subroutine. Independent variable X is
calculated as an 8-bit value, allowing 16 levels of interpolation on a 17-entry table. X is
passed to the subroutine, which returns an 8-bit result. The subroutine uses the data listed
in Table 5-15, based on the function shown in Figure 5-9.
5-32
31
NOT USED
Entry Number
Interpolation Fraction
Y = 1331
Table 5-14. Compressed Table Entries
Freescale Semiconductor, Inc.
Table Entry Offset
For More Information On This Product,
2
3
MC68340 USER’S MANUAL
Go to: www.freescale.com
(142 (1966 – 1311)) / 256 = 1674
LSR.W #6,Dx
X Value
16
512
786
15
0
Dx [8:15] = $02 = 2
Dx [0:7] = $8E = 142
0
0
0
Y Value
0
1311
1966
0
1
0
1
0
0
0
MOTOROLA
1
1
1
0
0