参数资料
型号: SAX-XC878M-13FFI5V
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
封装: PLASTIC, TQFP-64
文件页数: 116/141页
文件大小: 2385K
代理商: SAX-XC878M-13FFI5V
XC878CLM
Functional Description
Data Sheet
69
V1.1, 2009-08
3.6
Power Supply System with Embedded Voltage Regulator
The XC878 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 18 shows the XC878 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 18
XC878 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
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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