AT89LP51ED2-20MU Atmel, AT89LP51ED2-20MU Datasheet - Page 167

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

Specifications of AT89LP51ED2-20MU

• Rohs: yes
• Core: 8051
• 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: VQFN-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
• Processor Series: AT89x
• Program Memory Type: Flash
• Factory Pack Quantity: 360

Figure 21-1. DADC Block Diagram
3714A–MICRO–7/11
GND
P0.6
TEMP
P0.5
P0.4
P0.3
P0.2
P0.1
P0.0
VDD
REFERENCE
INTERNAL
VDD/8
7R
1.0V
R
VDD/8
8-BIT DATA BUS
R
R
VDD/2
To convert the unsigned binary value back to 2’s complement, subtract 02h from DADH in right-
adjusted mode or 80h from DADH in left-adjusted mode. Note that the DADH/DADL registers
cannot be directly manipulated as they are read-only in ADC mode and write-only in DAC mode.
INPUT
INPUT
POS.
NEG.
MUX
MUX
ADC INPUT SELECT
REGISTER (DADI)
CHANNEL SELECTION
SAMPLE &
+
-
HOLD
AT89LP51RD2/ED2/ID2 Preliminary
TRIGGER
SELECT
Overflows
DA+
Timer
DA-
ADC CTRL & STATUS
REGISTER (DADC)
INTERRUPT
10-BIT SAR
FLAG
PRESCALER
15
ADC DATA REGISTER
(DADH/DADL)
0
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