saa-xc866 Infineon Technologies Corporation, saa-xc866 Datasheet - Page 56

• Manufacturer Part Number: saa-xc866
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Infineon Technologies Corporation

3.6
The SAA-XC866 microcontroller requires two different levels of power supply:
• 5.0 V for the Embedded Voltage Regulator (EVR) and Ports
• 2.5 V for the core, memory, on-chip oscillator, and peripherals
Figure 20
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 20
EVR Features:
• Input voltage (V
• Output voltage (V
• Low power voltage regulator provided in power-down mode
• V
• V
Data Sheet
DDC
DDC
and V
brownout detection
shows the SAA-XC866 power supply system. A power supply of 5.0 V must
Power Supply System with Embedded Voltage Regulator
SAA-XC866 Power Supply System
DDP
DDP
prewarning detection
Memory
CPU &
(P0-P3)
DDC
GPIO
Ports
): 5.0 V
): 2.5 V ± 7.5%
On-chip
OSC
EVR
V
D D C
Peripheral
(2.5V)
52
logic
V
V
D D P
SSP
XTAL1&
FLASH
XTAL2
ADC
PLL
Functional Description
SAA-XC866
V1.2, 2008-02