AT89LP51RC2 Atmel Corporation, AT89LP51RC2 Datasheet - Page 163
AT89LP51RC2
Manufacturer Part Number
AT89LP51RC2
Description
Manufacturer
Atmel Corporation
Specifications of AT89LP51RC2
Flash (kbytes)
32 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)
1.375
Self Program Memory
API
Operating Voltage (vcc)
2.4 to 5.5
Timers
4
Isp
SPI/OCD/UART
Watchdog
Yes
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Table 20-3.
Notes:
3722A–MICRO–10/11
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)
AT89LP51RB2/RC2/IC2 Preliminary
RFB0
(1)
(2)
4
CCS1
3
CCS0
2
Reset Value = 0000 0000B
RFA1
1
RFA0
0
163
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