參數(shù)資料
型號: MC9S12A512VPV
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
封裝: ROHS COMPLIANT, LQFP-112
文件頁數(shù): 76/124頁
文件大?。?/td> 4657K
代理商: MC9S12A512VPV
MC9S12DP512 Device Guide V01.25
55
2.3 Detailed Signal Descriptions
2.3.1 EXTAL, XTAL — Oscillator Pins
EXTAL and XTAL are the crystal driver and external clock pins. On reset all the device clocks are derived
from the EXTAL input frequency. XTAL is the crystal output.
2.3.2 RESET — External Reset Pin
An active low bidirectional control signal, it acts as an input to initialize the MCU to a known start-up
state, and an output when an internal MCU function causes a reset.
2.3.3 TEST — Test Pin
This input only pin is reserved for test.
NOTE:
The TEST pin must be tied to VSS in all applications.
2.3.4 VREGEN — Voltage Regulator Enable Pin
This input only pin enables or disables the on-chip voltage regulator.
PS7
SS0
VDDX
PERS/
PPSS
Up
Port S I/O, SS of SPI0
PS6
SCK0
Port S I/O, SCK of SPI0
PS5
MOSI0
Port S I/O, MOSI of SPI0
PS4
MISO0
Port S I/O, MISO of SPI0
PS3
TXD1
Port S I/O, TXD of SCI1
PS2
RXD1
Port S I/O, RXD of SCI1
PS1
TXD0
Port S I/O, TXD of SCI0
PS0
RXD0
Port S I/O, RXD of SCI0
PT[7:0]
IOC[7:0]
VDDX
PERT/
PPST
Disabled Port T I/O, Timer channels
Pin Name
Funct. 1
Pin Name
Funct. 2
Pin Name
Funct. 3
Pin Name
Funct. 4
Pin Name
Funct. 5
Power
Supply
Internal Pull
Resistor
Description
CTRL
Reset
State
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