4000S Datasheet, PDF (24/35 Pages) Cypress Semiconductor – 32-bit MCU Subsystem

PSoC^® 4: PSoC 4000S
Family Datasheet
Table 31. Watch Crystal Oscillator (WCO) Specifications
Spec ID# Parameter
Description
Min Typ Max
SID398 FWCO
Crystal Frequency
– 32.768 –
SID399 FTOL
Frequency tolerance
–
50
250
SID400 ESR
Equivalent series resistance
–
50
–
SID401 PD
Drive Level
–
–
1
SID402 TSTART
Startup time
–
–
500
SID403 CL
Crystal Load Capacitance
6
–
12.5
SID404 C0
Crystal Shunt Capacitance
– 1.35
–
SID405 IWCO1
Operating Current (high power mode) –
–
8
SID406 IWCO2
Operating Current (low power mode) –
–
1
Units
kHz
ppm
kΩ
µW
ms
pF
pF
uA
uA
Details / Conditions
With 20-ppm crystal
Table 32. External Clock Specifications
Spec ID Parameter
SID305^[12] ExtClkFreq
SID306^[12] ExtClkDuty
Description
External clock input frequency
Duty cycle; measured at V_DD/2
Table 33. Block Specs
Spec ID Parameter
SID262^[12] T_CLKSWITCH
Description
System clock source switching time
Min Typ Max Units
0
–
48
MHz
45
–
55
%
Details/Conditions
–
–
Min Typ Max Units Details/Conditions
3
–
4 Periods
–
Table 34. Smart I/O Pass-through Time (Delay in Bypass Mode)
Spec ID# Parameter
Description
SID252 PRG_BYPASS Max delay added by Smart I/O in
bypass mode
Min Typ Max Units Details / Conditions
–
–
1.6
ns
Note
12. Guaranteed by characterization.
Document Number: 002-00123 Rev. *I
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