SAM4S Series [Preliminary]
Table 3-1.
Signal Name
Signal Description List (Continued)
Function
Type
Flash Memory
Reset State:
Active
Level
Voltage
reference
Comments
ERASE
Flash and NVM Configuration Bits Erase
Command
Input
High
VDDIO
- Erase Input
- Internal pull-down enabled
- Schmitt Trigger enabled
Reset/Test
NRST
TST
Synchronous Microcontroller Reset
Test Select
I/O
Input
Universal Asynchronous Receiver Transceiver - UARTx
URXDx
UTXDx
UART Receive Data
UART Transmit Data
Input
Output
PIO Controller - PIOA - PIOB - PIOC
PA0 - PA31
PB0 - PB14
PC0 - PC31
Parallel IO Controller A
Parallel IO Controller B
Parallel IO Controller C
I/O
I/O
I/O
PIO Controller - Parallel Capture Mode
PIODC0-PIODC7
PIODCCLK
PIODCEN1-2
Parallel Capture Mode Data
Parallel Capture Mode Clock
Parallel Capture Mode Enable
Input
Input
Input
External Bus Interface
D0 - D7
A0 - A23
NWAIT
Data Bus
Address Bus
External Wait Signal
I/O
Output
Input
Low
VDDIO
VDDIO
Reset State:
- PIO or System IOs
- Internal pull-up enabled
- Schmitt Trigger enabled
Low
VDDIO
Permanent Internal
pull-up
Permanent Internal
pull-down
Static Memory Controller - SMC
NCS0 - NCS3
NRD
NWE
Chip Select Lines
Read Signal
Write Enable
Output
Output
Output
NAND Flash Logic
NANDOE
NANDWE
NAND Flash Output Enable
NAND Flash Write Enable
Output
Output
Low
Low
Low
Low
Low
High Speed Multimedia Card Interface - HSMCI
MCCK
MCCDA
MCDA0 - MCDA3
Multimedia Card Clock
Multimedia Card Slot A Command
Multimedia Card Slot A Data
I/O
I/O
I/O
9
11100BS–ATARM–31-Jul-12
ATMEL [ ATMEL CORPORATION ]
