AT89LP6440-20PU Atmel, AT89LP6440-20PU Datasheet - Page 132

• Manufacturer Part Number: AT89LP6440-20PU
• Description: MCU 8051 64K FLASH ISP 40PDIP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP6440-20PU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 38
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 8K x 8
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 19-3.
Notes:
132
Symbol
CSC [1-0]
RFB [1-0]
CAC [1-0]
RFA [1-0]
AREF = AFH
Not Bit Addressable
Bit
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].
AT89LP6440 - Preliminary
Function
Comparator B Clock Select
CBC1
0
0
0
0
Comparator B Negative Input Channel Select
CRF1
0
0
0
0
Comparator A Clock Select
CAC1
0
0
0
0
Comparator A Negative Input Channel Select
RFA1
0
0
0
0
AREF
CBC1
7
– Analog Comparator Reference Control Register
CBC0
0
0
1
1
RFB0
0
0
1
1
CAC0
0
0
1
1
RFA0
0
0
1
1
CBC0
6
Clock Source
System Clock
Timer 0 Overflow
Timer 1 Overflow
Timer 2 Overflow
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)
(1)
(2)
RFB0
4
CAC1
3
CAC0
2
Reset Value = 0000 0000B
RFA1
1
RFA0
3706A–MICRO–9/09
0