SAM7X256_14 Datasheet, PDF (259/662 Pages) ATMEL Corporation – ARM-based Flash MCU

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.
• DLYBCS: Delay Between Chip Selects
This field defines the delay from NPCS inactive to the activation of another NPCS. The DLYBCS time guarantees non-overlap-
ping 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
=
D_-----L_----Y_----B_----C_----S_-
MCK
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
259