參數(shù)資料
型號： MC9S12B64MFU16
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP80
封裝： QFP-80
文件頁數(shù)： 86/128頁
文件大?。?/td> 1817K
代理商： MC9S12B64MFU16
Device User Guide — 9S12B128DGV1/D V01.10
60
Table 2-2 MC9S12B128 Power and Ground Connection Summary
2.3.1 VDDX, VSSX — Power & Ground Pins for I/O Drivers
External power and ground for I/O drivers. Because fast signal transitions place high, short-duration
current demands on the power supply, use bypass capacitors with high-frequency characteristics and place
them as close to the MCU as possible. Bypass requirements depend on how heavily the MCU pins are
loaded.
VDDX and VSSX are the supplies for Ports J, K, M, P, T and S.
2.3.2 VDDR, VSSR — Power & Ground Pins for I/O Drivers & for Internal
Voltage Regulator
External power and ground for I/O drivers and input to the internal voltage regulator. Because fast signal
transitions place high, short-duration current demands on the power supply, use bypass capacitors with
high-frequency characteristics and place them as close to the MCU as possible. Bypass requirements
depend on how heavily the MCU pins are loaded.
VDDR and VSSR are the supplies for Ports A, B, E and H.
Mnemonic
Pin Number
Nominal
Voltage
Description
112-pin QFP
VDD1, 2
13, 65
2.5V
Internal power and ground generated by internal regulator
VSS1, 2
14, 66
0V
VDDR
41
5.0V
External power and ground, supply to pin drivers and internal
voltage regulator.
VSSR
40
0V
VDDX
107
5.0V
External power and ground, supply to pin drivers.
VSSX
106
0V
VDDA
83
5.0V
Operating voltage and ground for the analog-to-digital
converters and the reference for the internal voltage regulator,
allows the supply voltage to the A/D to be bypassed
independently.
VSSA
86
0V
VRL
85
0V
Reference voltages for the analog-to-digital converter.
VRH
84
5.0V
VDDPLL
43
2.5V
Provides operating voltage and ground for the Phased-Locked
Loop. This allows the supply voltage to the PLL to be
bypassed independently. Internal power and ground
generated by internal regulator.
VSSPLL
45
0V
VREGEN
97
5.0V
Internal Voltage Regulator enable/disable
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