AT89LP51ED2 Atmel Corporation, AT89LP51ED2 Datasheet - Page 184
AT89LP51ED2
Manufacturer Part Number
AT89LP51ED2
Description
Manufacturer
Atmel Corporation
Specifications of AT89LP51ED2
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
Eeprom (bytes)
4096
Self Program Memory
API
Operating Voltage (vcc)
2.4 to 5.5
Timers
4
Isp
SPI/OCD/UART
Watchdog
Yes
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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
3714A–MICRO–7/11
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