SAM4L Datasheet, PDF (28/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
Table 3-7. Signal Descriptions List (Sheet 3 of 4)
Signal Name
Function
Type
Active
Level
Comments
PCEN1
Data enable 1
Input
PCEN2
Data enable 2
Input
Peripheral Event Controller - PEVC
PAD_EVT3 -
PAD_EVT0
Event Inputs
Input
Power Manager - PM
RESET_N
Reset
Input
Low
System Control Interface - SCIF
GCLK3 - GCLK0
Generic Clock Outputs
Output
GCLK_IN1 - GCLK_IN0 Generic Clock Inputs
Input
XIN0
Crystal 0 Input
Analog/
Digital
XOUT0
Crystal 0 Output
Analog
Serial Peripheral Interface - SPI
MISO
Master In Slave Out
I/O
MOSI
Master Out Slave In
I/O
NPCS3 - NPCS0
SPI Peripheral Chip Selects
I/O
Low
SCK
Clock
I/O
Timer/Counter - TC0, TC1
A0
Channel 0 Line A
I/O
A1
Channel 1 Line A
I/O
A2
Channel 2 Line A
I/O
B0
Channel 0 Line B
I/O
B1
Channel 1 Line B
I/O
B2
Channel 2 Line B
I/O
CLK0
Channel 0 External Clock Input
Input
CLK1
Channel 1 External Clock Input
Input
CLK2
Channel 2 External Clock Input
Input
Two-wire Interface - TWIMS0, TWIMS1, TWIMS2, TWIMS3
TWCK
Two-wire Serial Clock
I/O
TWD
Two-wire Serial Data
I/O
Universal Synchronous Asynchronous Receiver Transmitter - USART0, USART1, USART2, USART3
CLK
Clock
I/O
CTS
Clear To Send
Input
Low
RTS
Request To Send
Output
Low
RXD
Receive Data
Input
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42023C–SAM–02/2013