参数资料
型号: IV80C31-25R
厂商: ATMEL CORP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 25 MHz, MICROCONTROLLER, PQFP44
封装: 1.40 MM HEIGHT, QFP-44
文件页数: 54/91页
文件大小: 19688K
代理商: IV80C31-25R
40
7707F–AVR–11/10
AT90USB82/162
Figure 7-3.
3.3V configuration
Important note:
In the 3.3V configuration, the internal regulator is bypassed. The regulator has to be disabled to
avoid extra power consumption.
7.0.1
Regulator Control Register – REGCR
Bit 0 – REGDIS: Regulator Disable
Set this bit to disable the internal 3.3V regulator. This bit should be used only in a full 3.3V appli-
cation. This bit is reset to 0 in every case. The firmware has the responsability to set it after each
reset if required.
USB Pad
PS/2 Pad
AVR Core
I/O
3.3V Reg
Comparator
UVSS
VSS
UVCC
UCAP
VCC
Band
Gap
POR
BOD
PLL
AVCC
(3.3V)
Bit
7654
3
2
1
0
----
-
REGDIS
REGCR
Read/Write
RRRR
R
R/W
Initial Value
0000
0
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