AT89LP51ED2-20AAU Atmel, AT89LP51ED2-20AAU Datasheet - Page 182
AT89LP51ED2-20AAU
Manufacturer Part Number
AT89LP51ED2-20AAU
Description
8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
Manufacturer
Atmel
Datasheet
1.AT89LP51ED2-20AAU.pdf
(254 pages)
Specifications of AT89LP51ED2-20AAU
Rohs
yes
Core
8051
Processor Series
AT89x
Data Bus Width
8 bit
Maximum Clock Frequency
20 MHz
Program Memory Size
64 KB
Data Ram Size
256 B
On-chip Adc
Yes
Operating Supply Voltage
2.4 V to 5.5 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
LQFP-44
Mounting Style
SMD/SMT
Data Rom Size
4 KB
Interface Type
2-Wire, SPI, UART
Number Of Programmable I/os
36
Number Of Timers
3
Program Memory Type
Flash
Factory Pack Quantity
160
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22.1.7
22.1.8
182
Description: The forty bits in the M register are shifted one bit to the left. Bit 0 is cleared. No flags are affected.
Description: The MOVC instructions load the Accumulator with a code byte or constant from program memory. The address
Operation: LSL
Operation: MOVC
Encoding:
Encoding:
AT89LP51RD2/ED2/ID2 Preliminary
Function: Shift MAC Accumulator Left Logically
Function: Move code byte relative to Alternate Data Pointer
LSL M
MOVC A, @A+/DPTR
Example: The M register holds the value 0C5B1A29384H. The following instruction,
Example: A value between 0 and 3 is in the Accumulator. The following instructions will translate the value in the
Cycles: 2
Cycles: 4
Bytes: 2
Bytes: 2
LSL M
leaves the M register holding the value 8B63452708H.
(M
(M
of the byte fetched is the sum of the original unsigned 8-bit Accumulator contents and the contents of the
unselected Data Pointer. The base register is not altered. Sixteen-bit addition is performed so a carry-out from
the low-order eight bits may propagate through higher-order bits. No flags are affected.
Accumulator to one of four values defined by the DB (define byte) directive.
TABLE:
If the subroutine is called with the Accumulator equal to 01H, it returns with 77H in the Accumulator.
IF (DPS) = 0
THEN
ELSE
n+1
0
) ← 0
A5
A5
MOV
MOVC
RET
(A) ← ( (A) + (DPTR1) )
(A) ← ( (A) + (DPTR0) )
) ← (M
DB
DB
DB
DB
n
) n = 0 - 38
66H
/DPTR, #TABLE
A, @A+PC
77H
88H
99H
0
1
0
0
1
0
0
1
0
0
0
0
1
1
1
1
3714A–MICRO–7/11
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