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ST7263 Datasheet(PDF) 7 Page - STMicroelectronics

No. de pieza ST7263
Descripción Electrónicos  LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7263 Datasheet(HTML) 7 Page - STMicroelectronics

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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°
Pin Name
Level
Port / Control
Main
Function
(after reset)
Alternate Function
Input
Output
11
VDD
S
Power supply voltage (4V - 5.5V)
2
2
OSCOUT
O
Oscillator output
3
3
OSCIN
I
Oscillator input
44
VSS
S
Digital ground
5
5
PC2/USBOE
I/O
CT
X
X
Port C2
USB Output Enable
6
6
PC1/TDO
I/O
CT
X
X
Port C1
SCI transmit data output *)
7
7
PC0/RDI
I/O
CT
X
X
Port C0
SCI Receive Data Input
*)
8
8
RESET
I/O
X
X
Reset
--
9
NC
--
Not connected
9
10 PB7/AIN7/IT8
I/O CT 10mA X
XX
X
Port B7
ADC analog input 7
10 11 PB6/AIN6/IT7
I/O CT 10mA X
XX
X
Port B6
ADC analog input 6
11 12 VPP/TEST
S
Supply for EPROM and test input
12 13 PB5/AIN5/IT6
I/O CT 10mA X
XX
X
Port B5
ADC analog input 5
13 14 PB4/AIN4/IT5
I/O CT 10mA X
XX
X
Port B4
ADC analog input 4
14 15 PB3/AIN3
I/O CT 10mA X
XX
Port B3
ADC analog input 3
15 16 PB2/AIN2
I/O CT 10mA X
XX
Port B2
ADC analog input 2
16 17 PB1/AIN1
I/O CT 10mA X
XX
Port B1
ADC analog input 1
17 18 PB0/AIN0
I/O CT 10mA X
XX
Port B0
ADC Analog Input 0
18 19 PA7/OCMP2/IT4
I/O
CT
X
XX
Port A7
Timer Output Compare 2
19 20 PA6/OCMP1/IT3
I/O
CT
X
XX
Port A6
Timer Output Compare 1


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