AT89LP51RD2 Atmel Corporation, AT89LP51RD2 Datasheet - Page 184

• Manufacturer Part Number: AT89LP51RD2
• Manufacturer: Atmel Corporation

Specifications of AT89LP51RD2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 42
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 7
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 4
• Isp: SPI/OCD/UART
• Watchdog: Yes

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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