AT89LP51 Atmel Corporation, AT89LP51 Datasheet - Page 103

• Manufacturer Part Number: AT89LP51
• Manufacturer: Atmel Corporation

Specifications of AT89LP51

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 36
• Uart: 1
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 3
• Isp: SPI
• Watchdog: Yes

Figure 18-14. External Program Memory Read Cycle
Figure 18-15. External Data Memory Read Cycle
Figure 18-16. External Data Memory Write Cycle
3709D–MICRO–12/11
PORT 0
PORT 2
PSEN
ALE
PORT 0
PORT 2
PORT 0
PORT 2
ALE
ALE
WR
RD
P2
P2
t
t
AVLL
AVLL
t
AVLL
t
t
LHLL
LHLL
t
LHLL
A0 - A7
A0 - A7
t
LLAX
A8 - A15 FROM DPH OR P2.0 - P2.7
A8 - A15 FROM DPH OR P2.0 - P2.7
A0 - A7
t
t
t
AVWL
QVWX
AVWL
t
RLAZ
t
LLPL
t
AVIV
t
t
t
LLWL
AVDV
LLWL
t
t
LLAX
t
LLAX
LLDV
A8 - A15
t
PLAZ
DATA OUT
t
QVWH
t
t
t
t
LLIV
PLIV
INSTR IN
WLWH
RLRH
t
PXIX
t
t
PXIZ
RLDV
t
RHDX
DATA IN
t
t
PLPH
PXAV
t
t
WHLH
WHLH
t
t
t
t
RHDZ
WHAX
WHQX
WHAX
A8 - A15
A0 - A7
P2
P2
AT89LP51/52
103