Texas Instruments OMAP5912 Reference Manual page 395

OMAP5912 Clock Architecture
Table 10. ULPD Input Clocks
Input Name
ARMXOR_CK
EXT_48M
ULPD_PLL_CLK
32-kHz Clock
System Clock
40 Clocks
Description
MPU peripheral clock
External 48-MHz clock
Clock from 96-MHz PLL
32-kHz clock (either from 32-kHz oscillator or from external
32-kHz clock input)
12- to19.2-MHz system clock (12−19.2-MHz oscillator or from
external clock input)
Figure 15 provides descriptions of the ULPD input clocks.
Origin
OMAP3.2
GPIO_14
APLL
RTC
I/O
SPRU751A