AT89LP428-20JU Atmel, AT89LP428-20JU Datasheet - Page 104
AT89LP428-20JU
Manufacturer Part Number
AT89LP428-20JU
Description
MCU 8051 4K FLASH SPI 32PLCC
Manufacturer
Atmel
Series
89LPr
Datasheet
1.AT89LP428-20AU.pdf
(149 pages)
Specifications of AT89LP428-20JU
Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
30
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-PLCC
Processor Series
AT89x
Core
8051
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89ISP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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Table 18-3.
Notes:
104
Symbol
CSC
[1 - 0]
RFB
[1 - 0]
CAC
[1 - 0]
RFB
[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].
AT89LP428/828
Function
Comparator B Clock Select
Comparator B Negative Input Channel Select
Comparator A Clock Select
Comparator A Negative Input Channel Select
CBC1
CRF1
CAC1
AREF
RFA1
CBC1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
– Analog Comparator Reference Control Register
CBC0
CAC0
RFB0
RFA0
0
0
1
1
0
0
1
1
0
0
1
1
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
(~1.3V)
(~1.3V)
(~1.2V)
(~1.2V)
(~1.4V)
(~1.4V)
(1)
(2)
RFB0
4
CAC1
3
CAC0
2
Reset Value = 0000 0000B
RFA1
1
RFA0
3654A–MICRO–8/09
0
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