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ST72C254G1 Datasheet(PDF) 9 Page - STMicroelectronics

No. de pieza ST72C254G1
Descripción Electrónicos  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72C254G1 Datasheet(HTML) 9 Page - STMicroelectronics

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ST72104G, ST72215G, ST72216G, ST72254G
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Notes:
1. In the interrupt input column, “eiX” defines the associated external interrupt vector. If the weak pull-up
column (wpu) is merged with the interrupt column (int), then the I/O configuration is pull-up interrupt input,
else the configuration is floating interrupt input.
2. In the open drain output column, “T” defines a true open drain I/O (P-Buffer and protection diode to VDD
are not implemented). See Section 9 ”I/O PORTS” on page 30 and Section 13.8 ”I/O PORT PIN CHAR-
ACTERISTICS” on page 114 for more details.
3. OSC1 and OSC2 pins connect a crystal or ceramic resonator, an external RC, or an external source to
the on-chip oscillator see Section 2 ”PIN DESCRIPTION” on page 7 and Section 13.5 ”CLOCK AND TIM-
ING CHARACTERISTICS” on page 104 for more details.
18 16 PC1/OCMP1_B/AIN1
I/O
CT
X
ei0/ei1
X
X
X
Port C1
Timer B Output Compare 1 or
ADC Analog Input 1
19 17 PC0/ICAP1_B/AIN0
I/O
CT
X
ei0/ei1
X
X
X
Port C0
Timer B Input Capture 1 or
ADC Analog Input 0
20 18 PA7
I/O
CT HS X
ei0
X
X
Port A7
21 19 PA6 /SDAI
I/O
CT HS X
ei0
T
Port A6
I
2
C Data
22 20 PA5
I/O
CT HS X
ei0
X
X
Port A5
23 21 PA4 /SCLI
I/O
CT HS X
ei0
T
Port A4
I
2C Clock
24
NC
Not Connected
25
NC
26 22 PA3
I/O
CT HS X
ei0
X
X
Port A3
27 23 PA2
I/O
CT HS X
ei0
X
X
Port A2
28 24 PA1
I/O
CT HS X
ei0
X
X
Port A1
29 25 PA0
I/O
CT HS X
ei0
X
X
Port A0
30 26 ISPSEL
I
C
X
In situ programming selection (Should be tied
low in standard user mode).
31 27 VSS
S
Ground
32 28 VDD
S
Main power supply
Pin n
°
Pin Name
Level
Port / Control
Main
Function
(after reset)
Alternate Function
Input
Output


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