AT89LP51 Atmel Corporation, AT89LP51 Datasheet - Page 21

• 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

3709D–MICRO–12/11
Figure 3-13. Fast Mode External Data Memory Read Cycle (WS = 00B)
Figure 3-14. Compatibility Mode External Data Memory Write Cycle (WS0 = 0)
Figure 3-15. Compatibility Mode External Data Memory Read Cycle (WS0 = 0)
CLK
ALE
RD
CLK
ALE
P0
P2
WR
CLK
ALE
P0
P2
RD
P0
P2
P0 SFR
P2 SFR
PCH or
P0 SFR
P2 SFR
PCH or
S4
S4
P0 SFR
P2 SFR
S1
DPL or Ri
DPL or Ri
S5
OUT
S5
OUT
DPL or Ri OUT
S6
S6
S2
S1
DATA SAMPLED
DPH or P2 OUT
S1
DPH or P2 OUT
DATA OUT
DATA SAMPLED
DPH or P2 OUT
S2
FLOAT
S2
S3
FLOAT
S3
S3
S4
S4
S4
AT89LP51/52
P2 SFR
PCH or
P0 SFR
PCL or
S5
S5
P0 SFR
P2 SFR
PCH or
PCL or
P0 SFR
P2 SFR
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