參數(shù)資料
型號(hào): XC888
廠商: INFINEON TECHNOLOGIES AG
元件分類: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù): 64/119頁
文件大?。?/td> 895K
代理商: XC888
XC886/888CLM
Functional Description
Data Sheet
Prelimary
60
V0.1, 2006-02
3.6
Power Supply System with Embedded Voltage Regulator
The XC886/888 microcontroller requires two different levels of power supply:
3.3 V or 5.0 V for the Embedded Voltage Regulator (EVR) and Ports
2.5 V for the core, memory, on-chip oscillator, and peripherals
Figure 22
shows the XC886/888 power supply system. A power supply of 3.3 V or 5.0 V
must be provided from the external power supply pin. The 2.5 V power supply for the
logic is generated by the EVR. The EVR helps to reduce the power consumption of the
whole chip and the complexity of the application board design.
The EVR consists of a main voltage regulator and a low power voltage regulator. In
active mode, both voltage regulators are enabled. In power-down mode, the main
voltage regulator is switched off, while the low power voltage regulator continues to
function and provide power supply to the system with low power consumption.
Figure 22
XC886/888 Power Supply System
EVR Features:
Input voltage (V
DDP
): 3.3 V/5.0 V
Output voltage (V
DDC
): 2.5 V ± 7.5%
Low power voltage regulator provided in power-down mode
V
DDC
and V
DDP
prewarning detection
V
DDC
brownout detection
On-chip
OSC
CPU &
Memory
V
DDC
(2.5V)
V
DDP
(3.3V/5.0V)
V
SSP
GPIO Ports
(P0-P5)
EVR
Peripheral
logic
FLASH
ADC
PLL
XTAL1&
XTAL2
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