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Pin description
ST7LITEUS2, ST7LITEUS5
Legend/abbreviations for
Type: I = input, O = output, S = supply
In/Output level: C
T
= CMOS 0.3 V
DD
/0.7 V
DD
with input trigger
Output level: HS = High sink (on N-buffer only)
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
Ty
p
e
Level
Port/control
Main
function
(after
reset)
Alternate function
Inp
u
t
Ou
tpu
t
Input
Output
float
wp
u
in
t
an
a
OD
PP
1
V
DD
S
Main power supply
2
PA5/AIN4/CLKIN
I/
O
C
T
HS
X
ei4
X
X
X
Port A5
Analog input 4 or External Clock
Input
3
PA4/AIN3/MCO
I/
O
C
T
HS
X
ei3
X
X
X
Port A4
Analog input 3 or main clock output
4
PA3/RESET
(1)
O X
X
X
Port
A3
5
PA2/AIN2/LTIC
I/
O
C
T
HS
X
ei2
X
X
X
Port A2
Analog input 2 or Lite Timer Input
Capture
6
PA1/AIN1/
ICCCLK
I/
O
C
T
HS
X
ei1
X
X
X
Port A1
Analog input 1 or In Circuit
Communication Clock
Caution: During normal operation
this pin must be pulled-up, internally
or externally (external pull-up of 10k
mandatory in noisy environment).
This is to avoid entering I
2
C mode
unexpectedly during a reset. In the
application, even if the pin is
configured as output, any reset will
put it back in pull-up
7
PA0/AIN0/ATPW
M/ICCDATA
I/
O
C
T
HS
X
ei0
X
X
X
Port A0
Analog input 0 or Auto-Reload
Timer PWM or In Circuit
Communication Data
8
V
SS
S Ground
1.
After a reset, the multiplexed PA3/RESET pin will act as RESET. To configure this pin as output (Port A3), write 55h to
MUXCR0 and AAh to MUXCR1. For further details, please refer to
.
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