Atmel SAM4L Xplained Pro Evaluation Kit Atmel ATSAM4L-XPRO ATSAM4L-XPRO Data Sheet

42023E–SAM–07/2013

character string. Number of transfer must be a multiple of STEPS to get a complete scrolling 
of the string. Blank characters can be added to string to create a complete scrolling.

The frame counter selected (TIM.FCx) defines the number of frames between each PDCA trans-
fer, refer to 

Figure 39-12. Characters String Scrolling Examples (DIGN = 3)

Any segment can be modified using the Peripheral DMA Controller, making predefined anima-
tions possible. Data can be located in FLASH or RAM and are transferred periodically to the
display memory.

When PDCA writes to the Automated Bit Mapping Data Register (ABMDR), up to 8 segments
can be modified. PDCA must be configured to transfer a word made of:

• DATA[7:0], each bit represents the state of a segment,

String=’HELLO’

(string length=5, STEPS=3)

String=’HELLO   ‘

(string length=8, STEPS=6)

1

2

3

1

2

3

1

step

1

2

3

4

5

6

1