AM3359, AM3358, AM3357
AM3356, AM3354, AM3352
SPRS717F –OCTOBER 2011–REVISED APRIL 2013
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3.4 External Capacitors
To improve module performance, decoupling capacitors are required to suppress the switching noise generated
by high frequency and to stabilize the supply voltage. A decoupling capacitor is most effective when it is close to
the device, because this minimizes the inductance of the circuit board wiring and interconnects.
3.4.1 Voltage Decoupling Capacitors
Table 3-14 summarizes the Core voltage decoupling characteristics.
3.4.1.1 Core Voltage Decoupling Capacitors
To improve module performance, decoupling capacitors are required to suppress high-frequency switching noise
and to stabilize the supply voltage. A decoupling capacitor is most effective when located close to the AM335x
device, because this minimizes the inductance of the circuit board wiring and interconnects.
Table 3-14. Core Voltage Decoupling Characteristics
PARAMETER
TYP
10.08
10.05
UNIT
μF
(1)
CVDD_CORE
(2)(3)
CVDD_MPU
μF
(1) The typical value corresponds to 1 cap of 10 μF and 8 caps of 10 nF.
(2) Not available on the ZCE package. VDD_MPU is merged with VDD_CORE on the ZCE package.
(3) The typical value corresponds to 1 cap of 10 μF and 5 caps of 10 nF.
3.4.1.2 IO and Analog Voltage Decoupling Capacitors
Table 3-15 summarizes the power-supply decoupling capacitor recommendations.
Table 3-15. Power-Supply Decoupling Capacitor Characteristics
PARAMETER
TYP
10
UNIT
nF
CVDDA_ADC
CVDDA1P8V_USB0
CCVDDA3P3V_USB0
10
nF
10
nF
(1)
CVDDA1P8V_USB1
10
nF
(1)
CVDDA3P3V_USB1
10
nF
(2)
CVDDS
10.04
μF
(4)
CVDDS_DDR
CVDDS_OSC
10
10
nF
nF
nF
nF
nF
nF
nF
μF
μF
μF
CVDDS_PLL_DDR
CVDDS_PLL_CORE_LCD
CVDDS_SRAM_CORE_BG
CVDDS_SRAM_MPU_BB
CVDDS_PLL_MPU
10
10
10
10
CVDDS_RTC
10
(5)
CVDDSHV1
10.02
10.02
10.02
(1)(5)
CVDDSHV2
(1)(5)
CVDDSHV3
94
Device Operating Conditions
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