13
SAM4CP [DATASHEET]
43051E–ATPL–08/14
5.
Power Supply and Power Control
5.1
Power Supplies
The SAM4CP has several types of power supply pins. In most cases, a single supply scheme for all power supplies
(except VDDBU) is possible.
Figure 5-1
below shows power domains according to the different power supply pins.
Figure 5-1.
Power Domains
Table 5-1.
Power Supply Voltage Ranges
Power Supplies
Ranges
Comments
VDDIO
3.0V to 3.6V
Input/Output buffers supply
Oscillator pads supply
Flash memory charge pumps supply for erase and program operations, and read
operation
VDDBU
1.6V to 3.6V
Backup area power supply
VDDBU is automatically disconnected when VDDIO is present (>1.9V)
VDDIN
2.5V to 3.6V
Core Voltage Regulator supply
LCD Regulator supply
ADC and Programmable Voltage Reference supply
VDDLCD
2.5V to 3.6V
LCD Voltage Regulator output
External LCD power supply (LCD regulator not used)
VDDIO/VDDIN need to be supplied when the LCD Controller is used
VDDOUT
1.2V
Core Voltage Regulator Output. 120mA output current
VDDPLL
1.08V to 1.32V
PLLA and PLLB supply
VDDCORE
1.08V to 1.32V
Core logic, processors, memories and analog peripherals supply
VDDPLL PLC
1.2V
PLC PLL
VDDIN PLC
3.0V to 3.6V
PLC Digital LDO Regulator input
VDDOUT PLC
1.2V
PLC Digital LDO Regulator output
VDDCORE
VDDPLL
Cortex-M4
(CM4P0)
Cortex-M4
(CM4P1)
SRAM, ROM
Flash Logic
Peripherals
(SPI, USART, …)
PIO Controller
VDDIO
VDDBU
VDDIN
LRegulator
CRegulator
VDDLCD
VDDOUT
Input / Output
Buffers
AUTOSWITCH
Charge Pumps
Fast RC Osc
4/8/12 MHz
PLLA,
PLLB
RC OSC 32 kHz
XTAL OSC 32 kHz
RTC, RTT, RSTC
Backup, Reg, ...
10-bVoltage Reference
XTAL OSC,
3 - 20 MHz
L+ Switch Array
VoPLC Analog
VoPLC Digital
PLC PLL
VDDIN AN
VDDOUT AN
VDDIN PLC
VDDOUT PLC
VDDPLL PLC
VDDBU_SW
VDDIO
ADVREF