SAM4S Series [Preliminary]
Table 3-1.
Signal Name
Signal Description List (Continued)
Function
Type
Two-Wire Interface- TWI
Active
Level
Voltage
reference
Comments
TWDx
TWCKx
TWIx Two-wire Serial Data
TWIx Two-wire Serial Clock
Analog
I/O
I/O
ADVREF
ADC, DAC and Analog Comparator
Reference
Analog
12-bit Analog-to-Digital Converter - ADC
AD0-AD14
ADTRG
Analog Inputs
ADC Trigger
Analog,
Digital
Input
12-bit Digital-to-Analog Converter - DAC
DAC0 - DAC1
DACTRG
Analog output
DAC Trigger
Analog,
Digital
Input
Fast Flash Programming Interface - FFPI
PGMEN0-
PGMEN2
PGMM0-PGMM3
PGMD0-PGMD15
PGMRDY
PGMNVALID
PGMNOE
PGMCK
PGMNCMD
Programming Enabling
Programming Mode
Programming Data
Programming Ready
Data Direction
Programming Read
Programming Clock
Programming Command
Input
Input
I/O
Output
Output
Input
Input
Input
USB Full Speed Device
DDM
DDP
Note:
USB Full Speed Data -
USB Full Speed Data +
1. Schmitt Triggers can be disabled through PIO registers.
2. Some PIO lines are shared with System I/Os.
3. Refer to USB Section of the product Electrical Characteristics for information on Pull-down value in USB Mode.
4. See “Typical Powering Schematics” Section for restrictions on voltage range of Analog Cells.
5. TDO pin is set in input mode when the Cortex-M4 Core is not in debug mode. Thus the internal pull-up corresponding to this
PIO line must be enabled to avoid current consumption due to floating input.
Analog,
Digital
VDDIO
Reset State:
- USB Mode
- Internal Pull-down
Low
High
Low
Low
VDDIO
VDDIO
VDDIO
VDDIO
11
11100BS–ATARM–31-Jul-12
ATMEL [ ATMEL CORPORATION ]
