Arduino Pro Mini


Arduino Pro Mini Front View


Processor: ATmega328 (8-bit, 8MHz @3.3V - 16MHz @5V, 2 KB RAM, 32KB Flash)
[older boards were equipped with ATmega 168 with 16 KB Flash, 1 KB RAM]
Features: 14 digital I/O pins (6 can be used as analog inputs)

NameMCU pinFunction
1/TXOPD1 (31)TX/PCINT17/TXD
0/RXIPD0 (30)RX/PCINT16/RXD
RSTPC6 (29)RESET/PCINT14
GNDGround
2PD2 (32)PCINT18/INT0
3PD3 (1)PCINT19/INT1/OC2B (PWM 8bit)
4PD4 (2)T0/PCINT20/XCK
5PD5 (9)T1/PCINT21(PWM 8bit)
6PD6 (10)AIN0/PCINT22/OC0A (PWM 8bit)
7PD7 (11)AIN1/PCINT23
8PB0 (12)ICP1/PCINT0/CLKO
9PB1 (13)PCINT1/OC1A (PWM 8bit)
10PB2 (14)PCINT2/OC1B/SS (PWM 8bit)
11PB3 (15)PCINT3/OC2A/MOSI (PWM 8bit)
12PB4 (16)PCINT4/MISO
13PB5 (17)PCINT5/SCK (LED)
A6 (19)ADC6
A7 (22)ADC7
14/A0PC0 (23)PCINT8/ADC0
15/A1PC1 (24)PCINT9/ADC1
16/A2PC2 (25)PCINT10/ADC2
17/A3PC3 (26)PCINT11/ADC3
A4PC4 (27)PCINT12/ADC4/SDA
A5PC5 (28)PCINT13/ADC5/SCL
VCC3.3V or 5V
RSTPC6 (29)RESET/PCINT14
GNDGround
RAW3.3V-12V (3.3V)/5V-12V (5V)

FTDI connector:
NameMCU pinFunction
GNDGround
GNDGround
VCC3.3V or 5V
0/RXIPD0 (30)RX/PCINT16/RXD
1/TXOPD1 (31)TX/PCINT17/TXD
DTRDTR

Notes:
Absolute max for pin 40mA, reccomended 20mA
Absolute max 200mA for entire package