8T49N281_16 Datasheet, PDF (22/67 Pages) Integrated Device Technology – FemtoClock NG Octal Universal Frequency Translator

8T49N281 Datasheet
Bit Field Name
GPO1SEL[2:0]
GPO2SEL[2:0]
GPO3SEL[2:0]
GPO[3:0]
Rsvd
Field Type
R/W
R/W
R/W
R/W
R/W
GPIO Control Register Block Field Descriptions
Default Value Description
000b
Function of GPIO[1] pin when set to output mode by GPIO_DIR[1] register bit:
000 = General Purpose Output (value in GPO[1] register bit driven on GPIO[1] pin)
001 = Holdover Status Flag for Digital PLL reflected on GPIO[1] pin
010 = reserved
011 = reserved
100 = reserved
101 = reserved
110 = reserved
111 = reserved
000b
Function of GPIO[2] pin when set to output mode by GPIO_DIR[2] register bit:
000 = General Purpose Output (value in GPO[2] register bit driven on GPIO[2] pin)
001 = Loss-of-Signal Flag for Input Reference 0 reflected on GPIO[2] pin
010 = Loss-of-Signal Flag for Input Reference 1 reflected on GPIO[2] pin
011 = reserved
100 = reserved
101 = CSEL: Manual Clock Select Input
110 through 111 = reserved
000b
Function of GPIO[3] pin when set to output mode by GPIO_DIR[3] register bit:
000 = General Purpose Output (value in GPO[3] register bit driven on GPIO[3] pin)
001 = reserved
010 = Loss-of-Signal Status Flag for Input Reference 1 reflected on GPIO[3] pin
011 = reserved
100 = reserved
101 through 111 = reserved
00h
Output Values reflect on pin GPIO[3:0] when General-Purpose Output Mode selected.
-
Reserved. Always write 0 to this bit location. Read values are not defined.
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Revision 7, October 26, 2016