ADuC7019/20/21/22/24/25/26/27/28/29
Data Sheet
Pin No.
7019/7020 7021 7022 Mnemonic
Description
22
22
21
P2.0/SPM9/PLAO[5]/CONVSTART
Serial Port Multiplexed. General-Purpose Input and Output Port 2.0/UART/
Programmable Logic Array Output Element 5/Start Conversion Input Signal
for ADC.
23
23
22
P0.7/ECLK/XCLK/SPM8/PLAO[4] Serial Port Multiplexed. General-Purpose Input and Output Port 0.7/
Output for External Clock Signal/Input to the Internal Clock Generator
Circuits/UART/ Programmable Logic Array Output Element 4.
24
25
24
25
23
24
XCLKO
XCLKI
Output from the Crystal Oscillator Inverter.
Input to the Crystal Oscillator Inverter and Input to the Internal Clock
Generator Circuits.
26
27
28
26
27
28
25
26
27
P1.7/SPM7/PLAO[0]
P1.6/SPM6/PLAI[6]
Serial Port Multiplexed. General-Purpose Input and Output Port 1.7/UART,
SPI/Programmable Logic Array Output Element 0.
Serial Port Multiplexed. General-Purpose Input and Output Port 1.6/UART,
SPI/Programmable Logic Array Input Element 6.
Serial Port Multiplexed. General-Purpose Input and Output Port 1.5/UART,
SPI/Programmable Logic Array Input Element 5/External Interrupt
Request 3, Active High.
P1.5/SPM5/PLAI[5]/IRQ3
29
29
28
P1.4/SPM4/PLAI[4]/IRQ2
Serial Port Multiplexed. General-Purpose Input and Output Port 1.4/UART,
SPI/Programmable Logic Array Input Element 4/External Interrupt
Request 2, Active High.
30
31
32
33
34
35
30
31
32
33
29
30
31
32
P1.3/SPM3/PLAI[3]
P1.2/SPM2/PLAI[2]
P1.1/SPM1/PLAI[1]
P1.0/T1/SPM0/PLAI[0]
P4.2/PLAO[10]
Serial Port Multiplexed. General-Purpose Input and Output Port 1.3/UART,
I2C1/Programmable Logic Array Input Element 3.
Serial Port Multiplexed. General-Purpose Input and Output Port 1.2/UART,
I2C1/Programmable Logic Array Input Element 2.
Serial Port Multiplexed. General-Purpose Input and Output Port 1.1/UART,
I2C0/Programmable Logic Array Input Element 1.
Serial Port Multiplexed. General-Purpose Input and Output Port 1.0/
Timer1 Input/UART, I2C0/Programmable Logic Array Input Element 0.
General-Purpose Input and Output Port 4.2/Programmable Logic Array
Output Element 10.
2.5 V Internal Voltage Reference. Must be connected to a 0.47 µF capacitor
when using the internal reference.
‒
‒
34
33
VREF
36
37
35
36
34
35
AGND
AVDD
Analog Ground. Ground reference point for the analog circuitry.
3.3 V Analog Power.
0
0
0
EP
Exposed Pad. The pin configuration for the ADuC7019/ADuC7020/
ADuC7021/ADuC7022 has an exposed pad that must be soldered for
mechanical purposes and left unconnected.
Rev. F | Page 24 of 104
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