sx8724s Semtech Corporation, sx8724s Datasheet - Page 9

• Manufacturer Part Number: sx8724s
• Description: Zoomingadc For Sensing Data Acquisition
• Manufacturer: Semtech Corporation

Revision 1.0
© Semtech
2.1 Timing Characteristics
Table 5.
(18)
2.1.1 POR Timings
The Slave Select pin (SS) can be used to detect the effective start of the device. See
descriptions. The SPI interface can be accessed as soon as the SS pin (slave) is set to ‘output’ as illustrated on
ADVANCED COMMUNICATIONS & SENSING
Parameter
ADC INTERRUPT (READY) TIMING SPECIFICATIONS
READY pulse width
STARTUP TIMES
Startup sequence time at POR
Time to enable RC from Sleep after a SPI
command
Effective Start
POR
MSS
Direction
SSS
SX status
The READY pulse indicates End of Conversion. This is a Positive pulse of duration equal to one cycle of the ADC sampling rate in “continu-
ous mode”. See also
General timings
Figure 15, page 30
February 2011
OUTPUT
t
POR
MASTER
Figure 1. SPI Master detecting start sequence through Slave Select pin
POR
Figure 2. Slave Select pin and Power-On-Reset Timings
Symbol
t
t
START_SPI
STARTUP
t
t
RC enabling
RCEN
t
IRQ
for data conversion waveforms.
START_SPI
STARTUP SEQUENCE
SS
t
RCEN
t
Comment/Condition
Note 18
STARTUP
MSS
Page 9
calibration
Self
ZoomingADC for sensing data acquisition
RC disabling
SSS
INPUT
SS
Min
SLEEP
section 9.4, page 42
SX872xS
Typ
SLAVE
100
250
1
WAKE-UP SEQUENCE
SX8724S
Max
RC enabling
www.semtech.com
t
800
450
DATASHEET
RCEN
for functional
Unit
Figure 2
1/fs
μs
μs
μs
.