参数资料
型号: MC9SA256BCFUR2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP80
封装: QFP-80
文件页数: 34/102页
文件大小: 1050K
代理商: MC9SA256BCFUR2
MC9S12A256 Device Guide — V01.01
37
2.4.7 VREGEN — On Chip Voltage Regulator Enable
Enables the internal 5V to 2.5V voltage regulator. If this pin is tied low, VDD1,2 and VDDPLL must be
supplied externally.
Table 2-2 MC9S12A256 Power and Ground Connection Summary
Mnemonic
Pin Number
Nominal
Voltage
Description
112-pin QFP
VDD1, 2
13, 65
2.5 V
Internal power and ground generated by internal regulator
VSS1, 2
14, 66
0V
VDDR
41
5.0 V
External power and ground, supply to pin drivers and internal
voltage regulator.
VSSR
40
0 V
VDDX
107
5.0 V
External power and ground, supply to pin drivers.
VSSX
106
0 V
VDDA
83
5.0 V
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
0 V
VRL
85
0 V
Reference voltages for the analog-to-digital converter.
VRH
84
5.0 V
VDDPLL
43
2.5 V
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
0 V
VREGEN
97
5V
Internal Voltage Regulator enable/disable
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