8T49N287 Datasheet, PDF (41/75 Pages) Integrated Circuit Systems – Optional Fast Lock function

8T49N287 DATA SHEET
Table 6W. Digital PLL1 Status Register Bit Field Locations and Descriptions
Digital PLL1 Status Register Block Field Locations
Address (Hex)
D7
D6
D5
D4
D3
D2
020F
Rsvd
EXTLOS1
Rsvd
0210
Rsvd
Rsvd
Rsvd
Rsvd
0211
Rsvd
0212
Rsvd
0213
Rsvd
0214
Rsvd
0215
Rsvd
0216
Rsvd
0217
Rsvd
0218
Rsvd
D1
D0
CURR_REF1[2:0]
Rsvd
Rsvd
Rsvd
Bit Field Name
CURR_REF1[2:0]
EXTLOS1
Rsvd
Field
Type
R/O
R/O
R/W
Digital PLL1 Status Register Block Field Descriptions
Default Value
-
-
-
Description
Currently Selected Reference Status for Digital PLL1:
000 - 011 = No reference currently selected
100 = Input Reference 0 (CLK0, nCLK0) selected
101 = Input Reference 1 (CLK1, nCLK1) selected
110 = Reserved
111 = Reserved
External Loopback signal lost for PLL1:
0 = PLL1 has a valid feedback reference signal
1 = PLL1 has lost the external feedback reference signal and is no longer locked
Reserved. Always write 0 to this bit location. Read values are not defined.
Table 6X. General Purpose Input Status Register Bit Field Locations and Descriptions
Global Interrupt Status Register Block Field Locations
Address (Hex)
D7
D6
D5
D4
D3
D2
0219
Rsvd
GPI[3]
GPI[2]
D1
GPI[1]
D0
GPI[0]
Bit Field Name
GPI[3:0]
Field Type
R/O
General Purpose Input Status Register Block Field Descriptions
Default Value Description
-
Shows current values on GPIO[3:0] pins that are configured as General-Purpose Inputs.
REVISION 5 07/09/15
41
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