Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsDev KitsPCB design board

SAM4S Series [DATASHEET]

Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14

3. Signal Description

Table 3-1 gives details on signal names classified by peripheral.

Table 3-1. Signal Description List

Signal Name Function Type

Active

Level

Voltage

Reference Comments

Power Supplies

VDDIO

Peripherals I/O Lines and USB transceiver

Power Supply

Power – – 1.62V to 3.6V

VDDIN

Voltage Regulator Input, ADC, DAC and

Analog Comparator Power Supply

Power – – 1.62V to 3.6V

(4)

VDDOUT Voltage Regulator Output Power – – 1.2V output

VDDPLL Oscillator and PLL Power Supply Power – – 1.08 V to 1.32V

VDDCORE

Power the core, the embedded memories

and the peripherals

Power – – 1.08V to 1.32V

GND Ground Ground – – –

Clocks, Oscillators and PLLs

XIN Main Oscillator Input Input –

VDDIO

Reset State:

- PIO Input

- Internal Pull-up disabled

- Schmitt Trigger enabled

(1)

XOUT Main Oscillator Output Output –

XIN32 Slow Clock Oscillator Input Input –

XOUT32 Slow Clock Oscillator Output Output –

PCK0–PCK2 Programmable Clock Output Output –

Reset State:

- PIO Input

- Internal Pull-up enabled

- Schmitt Trigger enabled

(1)

Real Time Clock

RTCOUT0 Programmable RTC waveform output Output –

VDDIO

Reset State:

- PIO Input

- Internal Pull-up enabled

- Schmitt Trigger enabled

(1)

RTCOUT1 Programmable RTC waveform output Output –

Serial Wire/JTAG Debug Port - SWJ-DP

TCK/SWCLK Test Clock/Serial Wire Clock Input –

VDDIO

Reset State:

- SWJ-DP Mode

- Internal pull-up disabled

(5)

- Schmitt Trigger enabled

(1)

TDI Test Data In Input –

TDO/TRACESWO

Test Data Out / Trace Asynchronous Data

Out

Output –

TMS/SWDIO Test Mode Select /Serial Wire Input/Output Input / I/O –

JTAGSEL JTAG Selection Input High

Permanent Internal

pull-down