89©2018 Integrated Device Technology, Inc September 12, 2018
8A3xxxx Family Programming Guide
STATUS.OUTPUT_TDC0_MEASUREMENT
Indicates output TDC 0 measurement.
RESERVED N/A - This field must not be modified from the read value
STATUS[3:0] R/O 0 Status code.
When output TDC is not enabled, this shows 'Disabled'.
When OUTPUT_TDC_CTRL_4.GO is set and the configuration is valid, this
transitions to 'In progress'. When the operation completes successfully, status
transitions back to 'Idle' and OUTPUT_TDC_CTRL_4.GO will be cleared.
When OUTPUT_TDC_CTRL_4.GO is set and there is an invalid configuration,
then OUTPUT_TDC_CTRL_4.GO will be cleared and this will indicate the error
condition encountered.
0 = disabled
1 = idle
2 = in progress
3 = error - invalid source/target
4 = error - non-uniform master divider freq
5 = error - start failed
6 = error - measurement timeout
Table 99: STATUS.OUTPUT_TDC0_MEASUREMENT Bit Field Locations and Descriptions
Offset
Address
(Hex)
STATUS.OUTPUT_TDC0_MEASUREMENT Bit Field Locations
D7 D6 D5 D4 D3 D2 D1 D0
0B4h PHASE[7:0]
0B5h PHASE[15:8]
0B6h PHASE[23:16]
0B7h PHASE[31:24]
0B8h PHASE[39:32]
0B9h PHASE[47:40]
STATUS.OUTPUT_TDC0_MEASUREMENT Bit Field Descriptions
Bit Field Name Field Type Default Value Description
PHASE[47:0] R/O 0 Output TDC measurement.
Signed 48-bit integer in picoseconds.
Measurement = sum of samples / number of samples
A sample is collected every 100us.
Positive value indicates the target edge leads the source edge.
i.e.. source edge is to the left of the target edge
STATUS.OUTPUT_TDC3_STATUS Bit Field Descriptions
Bit Field Name Field Type Default Value Description
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