AT89LP51ED2 Atmel Corporation, AT89LP51ED2 Datasheet - Page 165

• Manufacturer Part Number: AT89LP51ED2
• 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

Table 20-3.
Notes:
3714A–MICRO–7/11
Symbol
CMPB
CMPA
RFB
CCS
RFA
1-0
AREF = BDH
Not Bit Addressable
Bit
1-0
1-0
1. CONB (ACSRB.5) must be cleared to 0 before changing RFB[1-0].
2. CONA (ACSRA.5) must be cleared to 0 before changing RFA[1-0].
Function
Comparator B Output.
Copy of Comparator B raw output value sampled by the system clock.
Comparator A Output
Copy of Comparator A raw output value sampled by the system clock.
Comparator B Negative Input Channel Select
CRF1
0
0
0
0
Comparator Clock Select
CCS1
0
0
0
0
Comparator A Negative Input Channel Select
RFA1
0
0
0
0
AREF
CMPB
7
– Analog Comparator Reference Control Register
RFB0
0
0
1
1
CCS0
0
0
1
1
RFA0
0
0
1
1
CMPA
6
B- Channel
AIN2 (P2.6)
Internal V
Internal V
Internal V
Clock Source
System Clock
Timer 0 Overflow
Timer 1 Overflow
Timer 2 Overflow
A- Channel
AIN1 (P2.5)
Internal V
Internal V
Internal V
RFB1
AREF-Δ
AREF
AREF+Δ
AREF-Δ
AREF
AREF+Δ
5
(~1.25V)
(~1.25V)
(~1.125V)
(~1.125V)
(~1.375V)
(~1.375V)
AT89LP51RD2/ED2/ID2 Preliminary
RFB0
(1)
(2)
4
CCS1
3
CCS0
2
Reset Value = 0000 0000B
RFA1
1
RFA0
0
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