AT89LP51ED2-20MU Atmel, AT89LP51ED2-20MU Datasheet - Page 184

• Manufacturer Part Number: AT89LP51ED2-20MU
• Description: 8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
• Manufacturer: Atmel

Specifications of AT89LP51ED2-20MU

• Rohs: yes
• Core: 8051
• 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: VQFN-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
• Processor Series: AT89x
• Program Memory Type: Flash
• Factory Pack Quantity: 360

22.1.11
22.1.12
184
Description: The MOVX instruction transfers data from external data memory to the Accumulator. The unselected Data
Description: The MOVX instruction transfer data from the Accumulator to external data memory. The unselected Data Pointer
Operation: MOVX
Operation: MOVX
Encoding:
Encoding:
AT89LP51RD2/ED2/ID2 Preliminary
Function: Move External using Alternate Data Pointer
Function: Move External using Alternate Data Pointer
MOVX A, @/DPTR
MOVX @/DPTR, A
Example: DPS = 0, DPTR0 contains 0123H and DPTR1 contains 4567H. The following instruction sequence,
Example: DPS = 0, DPTR0 contains 0123H and DPTR1 contains 4567H. The following instruction sequence,
Cycles: 3 (EDATA)
Cycles: 3 (EDATA)
Bytes: 2
Bytes: 2
Pointer generates a 16-bit address which targets EDATA, FDATA or XDATA.
MOVX
MOVX
copies the data from address 0123H to 4567H.
5 (FDATA or XDATA)
IF (DPS) = 0
ELSE
generates a 16-bit address which targets EDATA, FDATA or XDATA.
MOVX
MOVX
copies the data from address 0123H to 4567H.
5 (FDATA or XDATA)
IF (DPS) = 0
THEN
ELSE
A5
A5
(A) ← ((DPTR1))
(A) ← ((DPTR0))
((DPTR1)) ← (A)
((DPTR0)) ← (A)
A, @DPTR
@/DPTR, A
A, @DPTR
@/DPTR, A
1
1
1
1
1
1
0
1
0
0
0
0
0
0
0
0
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