AT89LP51ED2-20AAU Atmel, AT89LP51ED2-20AAU Datasheet - Page 173

• Manufacturer Part Number: AT89LP51ED2-20AAU
• Description: 8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
• Manufacturer: Atmel

Specifications of AT89LP51ED2-20AAU

• Rohs: yes
• Core: 8051
• Processor Series: AT89x
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 256 B
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-44
• Mounting Style: SMD/SMT
• Data Rom Size: 4 KB
• Interface Type: 2-Wire, SPI, UART
• Number Of Programmable I/os: 36
• Number Of Timers: 3
• Program Memory Type: Flash
• Factory Pack Quantity: 160

Note:
Table 21-4.
3714A–MICRO–7/11
Symbol
ACON
IREF
DIFF
TRG
ACS
2-0
DADL = ACH
Not Bit Addressable
Bit
1-0
1. V
TEMP
Function
Analog Input Connect
When cleared, the analog inputs are disconnected from the ADC. When set, the analog inputs selected by ACS
connected to the ADC. ACON must be zero when changing the input channel multiplexor (ACS
Internal Reference Enable
When set, the DADC uses the internal voltage reference. When cleared the DADC uses VDD for its reference.
Differential Mode Enable
Set to configure the ADC in differential mode. Clear to configure the ADC in single-ended mode.
Trigger Select
TRG1
0
0
1
1
ADC Channel Select
DIFF
0
0
0
0
0
0
0
0
1
1
1
1
1
DADL
ADC.7
is provided by the temperature sensor when IREF = 1. Otherwise V
7
– DADC Data Low Register
TRG0
0
1
0
1
ACS2
0
0
0
0
1
1
1
1
0
0
0
0
1
ADC.6
6
Trigger
Software (GO bit)
Timer 0 Overflow
Timer 1 Overflow
Timer 2 Overflow
ACS1
0
0
1
1
0
0
1
1
0
0
1
1
X
ADC.5
ACS0
0
1
0
1
0
1
0
1
0
1
0
1
X
5
V+
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
V
P0.6
P0.0
P0.2
P0.4
reserved
reserved
AT89LP51RD2/ED2/ID2 Preliminary
ADC.4
TEMP
4
(1)
V-
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
V
VDD/2
P0.1
P0.3
P0.5
REF
ADC.3
3
TEMP
ADC.2
= VDD/8 when IREF = 0.
2
Reset Value = 0000 0000B
ADC.1
1
2-0
).
ADC.0
0
2-0
are
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