ST72631K4 查看數據表（PDF） - STMicroelectronics
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ST72631K4
STMicroelectronics
ST72631K4 Datasheet PDF : 109 Pages
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ST7263
PIN DESCRIPTION (Cont’d)
RESET (see Note 1): Bidirectional. This active low
signal forces the initialization of the MCU. This
event is the top priority non maskable interrupt.
This pin is switched low when the Watchdog has
triggered or VDD is low. It can be used to reset ex-
ternal peripherals.
OSCIN/OSCOUT: Input/Output Oscillator pin.
These pins connect a parallel-resonant crystal, or
an external source to the on-chip oscillator.
VPP/TEST: EPROM programming input. This pin
must be held low during normal operating modes.
VDD/VSS (see Note 2): Main power supply and
Ground voltages.
VDDA/VSSA (see Note 2): Power Supply and
Ground for analog peripherals.
Alternate Functions: Several pins of the I/O ports
assume software programmable alternate func-
tions as shown in the pin description.
Note 1: Adding two 100nF decoupling capacitors
on Reset pin (respectively connected to VDD and
VSS) will significantly improve product electromag-
netic susceptibility performances.
Note 2: To enhance reliability of operation, it is
recommended to connect VDDA and VDD together
on the application board. The same recommenda-
tions apply to VSSA and VSS.
Table 2. Device Pin Description
Pin n°
Level
Pin Name
Port / Control
Input
Output
Main
Function
(after reset)
Alternate Function
1 1 VDD
2 2 OSCOUT
3 3 OSCIN
4 4 VSS
5 5 PC2/USBOE
6 6 PC1/TDO
7 7 PC0/RDI
8 8 RESET
-- 9 NC
9 10 PB7/AIN7/IT8
10 11 PB6/AIN6/IT7
11 12 VPP/TEST
12 13 PB5/AIN5/IT6
13 14 PB4/AIN4/IT5
14 15 PB3/AIN3
15 16 PB2/AIN2
16 17 PB1/AIN1
17 18 PB0/AIN0
18 19 PA7/OCMP2/IT4
19 20 PA6/OCMP1/IT3
S
Power supply voltage (4V - 5.5V)
O
Oscillator output
I
Oscillator input
S
Digital ground
I/O
CT
X
I/O
CT
X
I/O
CT
X
I/O
X
X Port C2
X Port C1
X Port C0
X
Reset
USB Output Enable
SCI transmit data output *)
SCI Receive Data Input *)
--
Not connected
I/O CT 10mA X
I/O CT 10mA X
S
XX
XX
X Port B7
ADC analog input 7
X Port B6
ADC analog input 6
Supply for EPROM and test input
I/O CT 10mA X
XX
I/O CT 10mA X
XX
I/O CT 10mA X
X
I/O CT 10mA X
X
I/O CT 10mA X
X
I/O CT 10mA X
X
I/O
CT
XX
I/O
CT
XX
X Port B5
X Port B4
X Port B3
X Port B2
X Port B1
X Port B0
X Port A7
X Port A6
ADC analog input 5
ADC analog input 4
ADC analog input 3
ADC analog input 2
ADC analog input 1
ADC Analog Input 0
Timer Output Compare 2
Timer Output Compare 1
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