AT94K05AL-25AJI Atmel, AT94K05AL-25AJI Datasheet - Page 113

• Manufacturer Part Number: AT94K05AL-25AJI
• Description: IC FPSLIC 5K GATE 25MHZ 84PLCC
• Manufacturer: Atmel
• Series: FPSLIC®r

Specifications of AT94K05AL-25AJI

• Core Type: 8-bit AVR
• Speed: 25MHz
• Interface: I²C, UART
• Program Sram Bytes: 4K-16K
• Fpga Sram: 2kb
• Data Sram Bytes: 4K ~ 16K
• Fpga Core Cells: 256
• Fpga Gates: 5K
• Fpga Registers: 436
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 84-PLCC
• For Use With: ATSTK594 - BOARD FPSLIC DAUGHTER FOR STK500
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

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