AT94K40AL-25DQU Atmel, AT94K40AL-25DQU Datasheet - Page 121

• Manufacturer Part Number: AT94K40AL-25DQU
• Description: IC FPSLIC 40K GATE 25MHZ 208PQFP
• Manufacturer: Atmel
• Series: FPSLIC®r

Specifications of AT94K40AL-25DQU

• 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: -40°C ~ 85°C
• Package / Case: 208-MQFP, 208-PQFP
• For Use With: ATSTK594 - BOARD FPSLIC DAUGHTER FOR STK500
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

4.28.7
4.28.7.1
1138I–FPSLI–1/08
Implementations
mul16x16_16
The registers R19:R18:R17:R16 will be incremented with the result of the multiplication of
0.771484375 with the ADC conversion result. In this example, the ADC result is treated as a
signed fraction number. We could also treat it as a signed integer and call it “mac16x16_32”
instead of “fmac16x16_32”. In this case, the 0.771484375 should be replaced with an integer.
Description
Usage
Statistics
Note:
Multiply of two 16-bit numbers with a 16-bit result.
R17:R16 = R23:R22 • R21:R20
Cycles: 9 + ret
Words: 6 + ret
Register usage: R0, R1 and R16 to R23 (8 registers)
mul16x16_16:
mul
movw
mul
add
mul
add
ret
1. Full orthogonality, i.e., any register pair can be used as long as the result and the two oper-
ands do not share register pairs. The routine is non-destructive to the operands.
r22, r20
r17:r16, r1:r0
r23, r20
r17, r0
r21, r22
r17, r0
; al * bl
; ah * bl
; bh * al
AT94KAL Series FPSLIC
(1)
121