參數(shù)資料
型號: HCS12COREUG
廠商: Motorola, Inc.
英文描述: MC9S12DT128B
中文描述: MC9S12DT128B
文件頁數(shù): 53/124頁
文件大?。?/td> 577K
代理商: HCS12COREUG
MC9S12DT128B Device User Guide — V01.07
53
2.3 Detailed Signal Descriptions
2.3.1 EXTAL, XTAL — Oscillator Pins
EXTALandXTALarethecrystaldriverandexternalclockpins.Onresetallthedeviceclocksarederived
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 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 2-3 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.
MCU
XFC
R
C
S
C
P
VDDPLL
VDDPLL
相關(guān)PDF資料
PDF描述
HCS132KMSR Radiation Hardened Quad 2-Input NAND Schmitt Trigger
HCS132K Radiation Hardened Quad 2-Input NAND Schmitt Trigger
HCS132MS Radiation Hardened Quad 2-Input NAND Schmitt Trigger
HCS132D Radiation Hardened Quad 2-Input NAND Schmitt Trigger
HCS132DMSR RESISTOR NETWORK; THR; BUSSED; 4.7K OHM X 15
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HCS12DBFAMILYPP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:HCS12DB Family Product Proposal
HCS12DFAMILYPP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:HCS12 D-Family Product Proposal
HCS12H 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Microcontroller
HCS12HFAMILYPP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:HCS12 H-Family Product Proposal
HCS12XDFAMILYPP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:HCS12 XD-Family Product Brief