Datasheet ST7LITEUSx (STMicroelectronics) - 7

ST7LITEUSx PIN DESCRIPTION
(Cont’d) Port and control configuration:
Legend / Abbreviations for
Table 1: – Input:float = floating, wpu = weak pull-up, int = in- Type: I = input, O = output, S = supply terrupt, ana = analog In/Output level: C – Output: OD = open drain, PP = push-pull T= CMOS 0.3VDD/0.7VDD with input trigger The RESET configuration of each pin is shown in Output level: HS = High sink (on N-buffer only) bold which is valid as long as the device is in reset state.
Table 1. Device Pin Description Level Port / Control Main Pin Input Output Function Pin Name Alternate Function No. Type (after Input oat reset) Output fl wpu int ana OD PP
1 VDD S Main power supply PA5/AIN4/ 2 I/O C CLKIN T HS
X
ei4 X X X
Port A5
Analog input 4 or External Clock Input 3 PA4/AIN3 I/O CT HS
X
ei3 X X X
Port A4
Analog input 3 4 PA3/RESET 1) O
X
X X
Port A3
RESET 1) Analog input 2 or Lite Timer Input Cap- 5 PA2/AIN2/LTIC I/O CT HS
X
ei2 X X X
Port A2
ture Analog input 1 or In Circuit Communica- tion Clock
Caution:
During normal operation this pin must be pulled-up, internally or ex- PA1/AIN1/ 6 I/O C ternally (external pull-up of 10k manda- ICCCLK T HS
X
ei1 X X X
Port A1
tory in noisy environment). This is to avoid entering ICC mode unexpectedly during a reset. In the application, even if the pin is configured as output, any re- set will put it back in pull-up PA0/AIN0/ATP- Analog input 0 or Auto-Reload Timer 7 I/O C WM/ICCDATA T HS
X
ei0 X X X
Port A0
PWM or In Circuit Communication Data 8 VSS S Ground
Note:
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 section 6.4 on page 24. 7/108 1