134
©2018 Integrated Device Technology, Inc
September 12, 2018
8A3xxxx Family Programming Guide
INPUT_0.IN_MODE
Configure the electrical properties of this input and select the predefined DPLL loop filter configuration.
TRIGGER: Writing to this byte triggers a read and activation in hardware of all the bytes of the INPUT module.
Table 162: INPUT_0.IN_MODE Bit Field Locations and Descriptions
Offset
Address
(Hex)
INPUT_0.IN_MODE Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
00Dh
DPLL_PRED
[7]
MUX_GPIO_
IN[6]
IN_DIFF[5]
IN_PNMODE
[4]
IN_INVERSE
[3]
RESERVED[2:1]
IN_EN[0]
INPUT_0.IN_MODE Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
DPLL_PRED[7]
R/W
0
Select predefined configuration to be applied to DPLL when this input is
selected, if predefined configuration is enabled in DPLL.
0 = pred0
1 = pred1
MUX_GPIO_IN[6]
R/W
0
Select a GPIO pin to mux into the input divider instead of the input pin.
Only applicable to INPUT8-15. When set to 1, the following mapping applies:
GPIO0 pin -> INPUT8
GPIO15 pin -> INPUT9
GPIO14 pin -> INPUT10
GPIO13 pin -> INPUT11
GPIO12 pin -> INPUT12
GPIO11 pin -> INPUT13
GPIO10 pin -> INPUT14
GPIO3 pin -> INPUT15
Applied only on a per input module basis (e.g. setting
INPUT_8_INPUT_MODE_MUX_GPIO_IN results only in the GPIO0 pin being
multiplexed into input divider 8).
0 = clock Input
1 = GPIO configured as input clock
IN_DIFF[5]
R/W
0
Select differential or single-ended input.
Only applicable to INPUT0-7. INPUT8-15 are always in single-ended mode.
When set to 1, two input pins will be paired up as the differential inputs:
input pin 0 and 8 -> INPUT0
input pin 1 and 9 -> INPUT1
input pin 2 and 10 -> INPUT2
input pin 3 and 11 -> INPUT3
input pin 4 and 12 -> INPUT4
input pin 5 and 13 -> INPUT5
input pin 6 and 14 -> INPUT6
input pin 7 and 15 -> INPUT7
0 = single-ended
1 = differential