Datasheet

AM3517, AM3505
www.ti.com SPRS550E –OCTOBER 2009–REVISED MARCH 2013
2.4.8 System and Miscellaneous Terminals
Table 2-26. System and Miscellaneous Signals Description
SIGNAL NAME [1] DESCRIPTION [2] TYPE [3] ZCN BALL [4] ZER BALL [4]
sys_32k 32-kHz clock input I K24 A8
sys_xtalin Main input clock. Oscillator input I K25 A10
sys_xtalout Output of oscillator O H25 A9
sys_altclk Alternate clock source selectable for I L25 B9
GPTIMERs (maximum 54 MHz), USB (48
MHz) , or NTSC/PAL (54 MHz)
sys_clkreq Request from device for system clock (open IO M24 B8
source type)
sys_clkout1 Configurable output clock1 O N25 E9
sys_clkout2 Configurable output clock2 O M25 E10
sys_boot0 Boot configuration mode bit 0 I Y4 AB19
sys_boot1 Boot configuration mode bit 1 I AA1 AB20
sys_boot2 Boot configuration mode bit 2 I AA2 W18
sys_boot3 Boot configuration mode bit 3 I AA3 AA19
sys_boot4 Boot configuration mode bit 4 I AB1 V18
sys_boot5 Boot configuration mode bit 5 I AB2 Y19
sys_boot6 Boot configuration mode bit 6 I AC1 W19
sys_boot7 Boot configuration mode bit 7 I AC2 AA20
sys_boot8 Boot configuration mode bit 8 I AC3 Y20
sys_nrespwron Power On Reset I Y2 AA18
sys_nreswarm Warm Boot Reset (open drain output) IOD Y3 Y18
sys_nirq External FIQ input I Y1 AB18
sys_ndmareq0 External DMA request 0 (system I M3 V12
expansion). Level (active low) or edge
(falling) selectable.
sys_ndmareq1 External DMA request 1 (system I M2,U1 AA11,V14
expansion). Level (active low) or edge
(falling) selectable.
sys_ndmareq2 External DMA request 2 (system I F1,M1 W12,AB7
expansion). Level (active low) or edge
(falling) selectable.
sys_ndmareq3 External DMA request 3 (system I G6,N5 AA12,V6
expansion). Level (active low) or edge
(falling) selectable.
Copyright © 2009–2013, Texas Instruments Incorporated Terminal Description 77
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