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ZHCS488K October 2011 – December 2018 AM3351 , AM3352 , AM3354 , AM3356 , AM3357 , AM3358 , AM3359

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机械数据 (封装 | 引脚)

ZCZ|324
ZCE|298

散热焊盘机械数据 (封装 | 引脚)

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7.7.2.2.2.6 Bulk Bypass Capacitors

Bulk bypass capacitors are required for moderate speed bypassing of the DDR2 and other circuitry. Table 7-50 contains the minimum numbers and capacitance required for the bulk bypass capacitors. Note that this table only covers the bypass needs of the AM335x DDR2 interface and DDR2 devices. Additional bulk bypass capacitance may be needed for other circuitry.

Table 7-50 Bulk Bypass Capacitors⁽¹⁾

NO.	PARAMETER	MIN	UNIT
1	AM335x VDDS_DDR bulk bypass capacitor count	1	devices
2	AM335x VDDS_DDR bulk bypass total capacitance	10	μF
3	DDR2 number 1 bulk bypass capacitor count	1	devices
4	DDR2 number 1 bulk bypass total capacitance	10	μF
5	DDR2 number 2 bulk bypass capacitor count⁽²⁾	1	devices
6	DDR2 number 2 bulk bypass total capacitance⁽²⁾	10	μF

These devices should be placed near the device they are bypassing, but preference should be given to the placement of the high-speed (HS) bypass capacitors.
Only used when two DDR2 devices are used.