AT94K40AL-25BQC Atmel, AT94K40AL-25BQC Datasheet - Page 113
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AT94K40AL-25BQC
Manufacturer Part Number
AT94K40AL-25BQC
Description
IC FPSLIC 40K GATE 25MHZ 144LQFP
Manufacturer
Atmel
Series
FPSLIC®r
Specifications of AT94K40AL-25BQC
Core Type
8-bit AVR
Speed
18MHz
Interface
I²C, UART
Program Sram Bytes
20K-32K
Fpga Sram
18kb
Data Sram Bytes
4K ~ 16K
Fpga Core Cells
2304
Fpga Gates
40K
Fpga Registers
2862
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 70°C
Package / Case
144-LQFP
For Use With
ATSTK594 - BOARD FPSLIC DAUGHTER FOR STK500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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4.28.1
1138I–FPSLI–1/08
8-bit Multiplication
Table 4-24.
Doing an 8-bit multiply using the hardware multiplier is simple: just load the operands into two
registers (or only one for square multiply) and execute one of the multiply instructions. The result
will be placed in register pair R1:R0. However, note that only the MUL instruction does not have
register usage restrictions.
multiply instructions.
8-bit x 8-bit Routines:
Unsigned Multiply 8 x 8 = 16 bits
Signed Multiply 8 x 8 = 16 bits
Fractional Signed/Unsigned Multiply 8 x 8 = 16 bits
Fractional Signed Multiply-accumulate 8 x 8 + = 16 bits
16-bit x 16-bit Routines:
Signed/Unsigned Multiply 16 x 16 = 32 bits
UnSigned Multiply 16 x 16 = 32 bits
Signed Multiply 16 x 16 = 32 bits
Signed Multiply-accumulate 16 x 16 + = 32 bits
Fractional Signed Multiply 16 x 16 = 32 bits
Fractional Signed Multiply-accumulate 16 x 16 + = 32 bits
Performance Summary
Figure 4-36
shows the valid (operand) register usage for each of the
AT94KAL Series FPSLIC
Word (Cycles)
Word (Cycles)
13 (17)
15 (19)
19 (23)
16 (20)
21 (25)
1 (2)
1 (2)
1 (2)
3 (4)
6 (9)
113
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