Datasheet

Pin description ST7LITE20F2 ST7LITE25F2 ST7LITE29F2
16/170 DocID8349 Rev 7
Port and control configuration:
• Input:
– float = floating, wpu = weak pull-up, int = interrupt, ana = analog
• Output:
– OD = open drain
– PP = push-pull
The RESET configuration of each pin is shown in bold which is valid as long as the device is
in reset state.
Table 2. Device pin description
Pin
No.
Pin name
Type
Level Port / Control
Main
function
(after
reset)
Alternate function
SO20
DIP20
Input
Output
Input Output
float
wpu
int
ana
OD PP
116V
SS
S - - ---- - -Ground
217V
DD
S - - - - - - - - Main power supply
3 18 RESET I/O C
T
--X--X-
Top priority non maskable interrupt (active
low)
4 19 PB0/AIN0/SS
I/O C
T
X
ei3
XXXPort B0
ADC analog input 0 or SPI Slave
Select (active low)
(1)
5 20 PB1/AIN1/SCK I/O C
T
X XXXPort B1
ADC analog input 1 or SPI Serial
Clock
(1)
6 1 PB2/AIN2/MISO I/O C
T
X XXXPort B2
ADC analog input 2 or SPI Master
in/ Slave out data
7 2 PB3/AIN3/MOSI I/O C
T
X
ei2
XXXPort B3
ADC analog input 3 or SPI Master
out / Slave in data
8 3 PB4/AIN4/CLKIN I/O C
T
X XXXPort B4
ADC analog input 4 or external
clock input
9 4 PB5/AIN5 I/O C
T
X XXXPort B5 ADC analog input 5
10 5 PB6/AIN6 I/O C
T
X XXXPort B6 ADC analog input 6
11 6 PA7 I/O C
T
HS X ei1 - X X Port A7 -
12 7
PA6 /MCO/
ICCCLK/BREAK
I/O C
T
Xei1 -XXPort A6
Main clock output or in circuit
communication clock or external
BREAK
(2)
13 8
PA5 /ATPWM3/
ICCDATA
I/O C
T
HS X
ei1
-XXPort A5
Auto-reload timer PWM3 or In
circuit communication data
14 9 PA4/ATPWM2 I/O C
T
HS X -XXPort A4 Auto-reload timer PWM2