AT89LP6440-20PU Atmel, AT89LP6440-20PU Datasheet - Page 143
AT89LP6440-20PU
Manufacturer Part Number
AT89LP6440-20PU
Description
MCU 8051 64K FLASH ISP 40PDIP
Manufacturer
Atmel
Series
89LPr
Datasheet
1.AT89LP6440-20MU.pdf
(194 pages)
Specifications of AT89LP6440-20PU
Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
38
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
8K x 8
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.4 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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22. Instruction Set Summary
3706A–MICRO–9/09
The AT89LP6440 is fully binary compatible with the 8051 instruction set. The difference
between the AT89LP6440 and the standard 8051 is the number of cycles required to execute an
instruction. Instructions in the AT89LP6440 may take 1 to 9 clock cycles to complete. The exe-
cution times of most instructions may be computed using
Table 22-1.
Generic Instruction Types
Most arithmetic, logical, bit and transfer instructions
Branches and Calls
Single Byte Indirect (i.e. ADD A, @Ri, etc.)
RET, RETI
MOVC
MOVX
MUL
DIV
MAC
INC DPTR
Arithmetic
ADD A, Rn
ADD A, direct
ADD A, @Ri
ADD A, #data
ADDC A, Rn
ADDC A, direct
ADDC A, @Ri
ADDC A, #data
SUBB A, Rn
SUBB A, direct
SUBB A, @Ri
SUBB A, #data
INC Rn
INC direct
INC @Ri
INC A
DEC Rn
DEC direct
DEC @Ri
DEC A
INC DPTR
Instruction Execution Times and Exceptions
Bytes
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
AT89LP6440 - Preliminary
8051
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
24
Table
Clock Cycles
22-1.
AT89LP
Cycle Count Formula
1
2
2
2
1
2
2
2
1
2
2
2
1
2
2
2
1
2
2
2
2
# bytes + 1
# bytes
4/5
2/4
2
3
2
4
9
2
(4)
(2)
Hex Code
28-2F
38-3F
98-9F
08-0F
18-1F
26-27
36-37
96-97
06-07
16-17
25
24
35
34
95
94
05
04
15
14
A3
143
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