參數(shù)資料
型號: MC9S12DT128EMFU
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 94/134頁
文件大小: 2122K
代理商: MC9S12DT128EMFU
MC9S12DT128 Device User Guide — V02.08
62
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 XFC — PLL Loop Filter Pin
PLL loop filter. Please ask your Motorola representative for the interactive application note to compute
PLL loop filter elements. Any current leakage on this pin must be avoided.
Figure 2-4 PLL Loop Filter Connections
2.3.5 BKGD / TAGHI / MODC — Background Debug, Tag High, and Mode Pin
The BKGD/TAGHI/MODC pin is used as a pseudo-open-drain pin for the background debug
communication. In MCU expanded modes of operation when instruction tagging is on, an input low on
this pin during the falling edge of E-clock tags the high half of the instruction word being read into the
instruction queue. It is used as a MCU operating mode select pin during reset. The state of this pin is
latched to the MODC bit at the rising edge of RESET. This pin has a permanently enabled pull-up device.
2.3.6 PAD[15] / AN1[7] / ETRIG1 — Port AD Input Pin [15]
PAD15 is a general purpose input pin and analog input of the analog to digital converter ATD1. It can act
as an external trigger input for the ATD1.
2.3.7 PAD[14:8] / AN1[6:0] — Port AD Input Pins [14:8]
PAD14 - PAD8 are general purpose input pins and analog inputs of the analog to digital converter ATD1.
MCU
XFC
R
CS
CP
VDDPLL
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