AT89LP828-20AU Atmel, AT89LP828-20AU Datasheet - Page 104

• Manufacturer Part Number: AT89LP828-20AU
• Description: MCU 8051 8K FLASH SPI 32TQFP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP828-20AU

• 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: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 1K 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-TQFP, 32-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: 2-Wire, SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 30
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89ISP
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

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