SAM4C_14 Datasheet, PDF (956/1303 Pages) ATMEL Corporation – Atmel | SMART ARM-based Flash MCU

Table 39-7.
SEGSEL
...
48
49
Segment Pin Assignments
I/O Port in Use as Segment Driver
...
SEG0:48
SEG0:49
I/O Port Pin if SLCDC_SMR0/1 = 0
...
SEG49
None
Programming is straightforward in this mode but it prevents flexibility of use of the digital peripheral multiplexed on
SEG0:49 especially when the number of segments to drive is close to the maximum (50).
For example, if the SEGSEL is set to 48, only the digital peripheral associated to SEG49 can be used and none of
the other digital peripherals multiplexed on SEG0:48 I/O can be used.
To offer a flexible selection of digital peripherals multiplexed on SEG0:49 the user can manually configure the SEG
I/O pins to be driven by the SLCDC.
This is done by programming the SLCDC_SMR0/1 registers. As soon as their values differ from 0 the segment
remapping mode is used.
When configuring a logic 1 at index n (n = 0..49) in SLCDC_SMR0 or SLCDC_SMR0, the SLCDC forces the SEGn
I/O pin to be driven by a segment waveform. In this mode the SEGSEL field configuration value in SLCDC_MR is
ignored.
In remapping mode the software dispatches the pixels into SLCDC_LMEMRx or SLCDC_MMEMRx according to
what is programmed in SLCDC_SMR0 or SLCDC_SMR0.
956
SAM4C Series [DATASHEET]
Atmel-11102E-ATARM-SAM4C32-SAM4C16-SAM4C8-Datasheet_06-Oct-14