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ST72254G bảng dữ liệu(PDF) 8 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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ST72104G, ST72215G, ST72216G, ST72254G
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PIN DESCRIPTION (Cont’d)
For external pin connection guidelines, refer to Section 13 ”ELECTRICAL CHARACTERISTICS” on page
96.
Legend / Abbreviations for Table 1:
Type:
I = input, O = output, S = supply
Input level:
A = Dedicated analog input
In/Output level: C = CMOS 0.3VDD/0.7VDD,
CT= CMOS 0.3VDD/0.7VDD with input trigger
Output level:
HS = 20mA high sink (on N-buffer only)
Port and control configuration:
– Input:
float = floating, wpu = weak pull-up, int = interrupt 1), ana = analog
– Output:
OD = open drain 2), PP = push-pull
Refer to Section 9 ”I/O PORTS” on page 30 for more details on the software configuration of the I/O ports.
The RESET configuration of each pin is shown in bold. This configuration is valid as long as the device is
in reset state.
Table 1. Device Pin Description
Pin n
°
Pin Name
Level
Port / Control
Main
Function
(after reset)
Alternate Function
Input
Output
1
1
RESET
I/O
CT
X
X
Top priority non maskable interrupt (active low)
2
2
OSC1 3)
I
External clock input or Resonator oscillator in-
verter input or resistor input for RC oscillator
3
3
OSC2 3)
O
Resonator oscillator inverter output or capaci-
tor input for RC oscillator
4
4
PB7/SS
I/O
CT
X
ei1
X
X
Port B7
SPI Slave Select (active low)
5
5
PB6/SCK/ISPCLK
I/O
CT
X
ei1
X
X
Port B6
SPI Serial Clock or ISP Clock
6
6
PB5/MISO /ISPDATA
I/O
CT
X
ei1
X
X
Port B5
SPI Master In/ Slave Out Data
or ISP Data
7
7
PB4/MOSI
I/O
CT
X
ei1
X
X
Port B4
SPI Master Out / Slave In Data
8NC
Not Connected
9NC
10
8
PB3/OCMP2_A
I/O
CT
X
ei1
X
X
Port B3
Timer A Output Compare 2
11
9
PB2/ICAP2_A
I/O
CT
X
ei1
X
X
Port B2
Timer A Input Capture 2
12 10 PB1 /OCMP1_A
I/O
CT
X
ei1
X
X
Port B1
Timer A Output Compare 1
13 11 PB0 /ICAP1_A
I/O
CT
X
ei1
X
X
Port B0
Timer A Input Capture 1
14 12 PC5/EXTCLK_A/AIN5 I/O
CT
X
ei0/ei1
X
X
Port C5
Timer A Input Clock or ADC
Analog Input 5
15 13 PC4/OCMP2_B/AIN4
I/O
CT
X
ei0/ei1
X
X
Port C4
Timer B Output Compare 2 or
ADC Analog Input 4
16 14 PC3/ ICAP2_B/AIN3
I/O
CT
X
ei0/ei1
X
X
X
Port C3
Timer B Input Capture 2 or
ADC Analog Input 3
17 15 PC2/MCO/AIN2
I/O
CT
X
ei0/ei1
X
X
X
Port C2
Main clock output (fCPU)or
ADC Analog Input 2
6


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