SAM4L Datasheet, PDF (1152/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
Figure 42-16. SPI Slave Mode, NPCS Timing
SPCK, CPOL=0
SPCK, CPOL=1
NPCS
SPI12
SPI14
SPI13
SPI15
Table 42-60. SPI Timing, Slave Mode⁽¹⁾
Symbol
Parameter
SPI6
SPCK falling to MISO delay
SPI7
MOSI setup time before SPCK rises
SPI8
MOSI hold time after SPCK rises
SPI9
SPCK rising to MISO delay
SPI10
MOSI setup time before SPCK falls
SPI11
MOSI hold time after SPCK falls
SPI12
NPCS setup time before SPCK rises
SPI13
NPCS hold time after SPCK falls
SPI14
NPCS setup time before SPCK falls
SPI15
NPCS hold time after SPCK rises
Conditions
V_VDDIO from
3.0V to 3.6V,
maximum
external
capacitor =
40 pF
Min
344.57
7.24
347.52
5.44
2.61
5.85
2.27
1.30
Max
592.72
543.1
Note: 1. These values are based on simulation. These values are not covered by test limits in production.
Units
ns
Maximum SPI Frequency, Slave Input Mode
The maximum SPI slave input frequency is given by the following formula:
f_SPCKMAX = MIN(f_CLKSPI,_S----_P-¹---_I--_n--)
Where SPIn is the MOSI setup and hold time, SPI7 + SPI8 or SPI10 + SPI11 depending on
CPOL and NCPHA. f_CLKSPI is the maximum frequency of the CLK_SPI. Refer to the SPI chap-
ter for a description of this clock.
Maximum SPI Frequency, Slave Output Mode
The maximum SPI slave output frequency is given by the following formula:
f_SPCKMAX = MIN(f_PINMAX,-_S---_P----_I--_n-----+--¹---_t-_S---_E----_T---_U---_P--)
42023C–SAM–02/2013
1152