SAM4CP16B View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

SAM4CP16B

SMART Power Line Communications Device

Atmel Corporation 

5.1.5.2 Single Supply with Backup Battery

Figure 5-3 shows a typical single power supply scheme for VDDIO, VDDIN, VDDIN AN, VDDIN PLC, VDDCORE,

VDDPLL and VDDPLL PLC. VDDBU is supplied with a separate backup battery. In this supply scheme, the internal LCD

voltage regulator can be used. Note that if anti-tamper pins (TMP1 to TMP3) and the RTCOUT0 output have to be used

in backup mode, VDDIO must be kept. The reference voltage of the TMP1 to TMP3 and RTCOUT0 pins is VDDIO.

Note that PLC transceiver is not functional when working in backup mode.

Figure 5-3. Single Supply with Backup Battery

Backup

Battery

Backup Power Supply

(1.6V-3.6V)

+

-

VDDBU

Main Supply

IN

OUT

Voltage

Regulator

Main Supply

(3.0V-3.6V)

ON / OFF

VDDIO

VDDLCD

VDDIN

VDDOUT

VDDCORE

VDDPLL

VDDIN AN

VDDOUT AN

Automatic

Power Switch

Backup Region

RTC, RTT

and

Backup Registers

PRIME PLC

Transceiver

LCD Voltage

Regulator

- 10-bit ADC

- Temp. Sensor

- Voltage Ref.

Core Voltage

Regulator

LCD Buffers

+

LCD Switch Array

PLC Analog

Voltage

Regulator

VDDIN PLC

VDDOUT PLC

VDDPLL PLC

ADC PLC

PLC Digital

Voltage

Regulator

External Wake-Up Signal

Shutdown (SHDN)(1)

Force Wake-Up (FWUP)

Notes: 1. Example with the SHDN pin used to control the main regulator enable pin. SHDN defaults to VDDBU at

startup and when the device wakes up from a wake-up event (external pin, RTC alarm, etc.). When the

device is in backup mode, SHDN defaults to 0.

SAM4CP [DATASHEET] 16

43051E–ATPL–08/14

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