AT89LP428-20AU Atmel, AT89LP428-20AU Datasheet - Page 107

MCU 8051 4K FLASH SPI 32TQFP

AT89LP428-20AU

Manufacturer Part Number
AT89LP428-20AU
Description
MCU 8051 4K FLASH SPI 32TQFP
Manufacturer
Atmel
Series
89LPr
Datasheet

Specifications of AT89LP428-20AU

Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
30
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-TQFP, 32-VQFP
Processor Series
AT89x
Core
8051
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89ISP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / Rohs Status
 Details

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT89LP428-20AU
Manufacturer:
RFMD
Quantity:
1 240
Part Number:
AT89LP428-20AU
Manufacturer:
Atmel
Quantity:
10 000
20. Instruction Set Summary
3654A–MICRO–8/09
The AT89LP428/828 is fully binary compatible with the MCS-51 instruction set. The difference
between the AT89LP428/828 and the standard 8051 is the number of cycles required to execute
an instruction. Instructions in the AT89LP428/828 may take 1, 2, 3, 4 or 5 clock cycles to com-
plete. The execution times of most instructions may be computed using
Table 20-1.
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
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
INC /DPTR
(1)
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
2
8051
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
24
Clock Cycles
AT89LP428/828
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
3
Table 20-1 on page
# bytes + 1
# bytes
2/4
2
4
3
2
4
2
(2)
Hex Code
28 - 2F
38 - 3F
98 - 9F
08 - 0F
18 - 1F
26 - 27
36 - 37
96 - 97
06 - 07
16 - 17
A5 A3
25
24
35
34
95
94
05
04
15
14
A3
107.
107

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