Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet

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SAM9M10 [DATASHEET]

6355F–ATARM–12-Mar-13

LLB controls the local loopback on the data serializer for testing in Master Mode only. (MISO is internally connected on
MOSI.)

This field is only used if Fixed Peripheral Select is active (PS = 0).

If PCSDEC = 0: 

PCS = xxx0

NPCS[3:0] = 1110

PCS = xx01

NPCS[3:0] = 1101     

PCS = x011

NPCS[3:0] = 1011

PCS = 0111

NPCS[3:0] = 0111

PCS = 1111

 forbidden (no peripheral is selected)

(x = don’t care)

If PCSDEC = 1:

NPCS[3:0] output signals = PCS.

This field defines the delay from NPCS inactive to the activation of another NPCS. The DLYBCS time guarantees non-over-
lapping chip selects and solves bus contentions in case of peripherals having long data float times.

If DLYBCS is less than or equal to six, six MCK periods will be inserted by default.

Otherwise, the following equation determines the delay:

Delay Between Chip Selects 

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