278
©2018 Integrated Device Technology, Inc
September 12, 2018
8A3xxxx Family Programming Guide
OUTPUT_TDC_CFG.OUTPUT_TDC_CFG_GBL_1
Configure the fast lock disable delay.
OUTPUT_TDC_CFG.OUTPUT_TDC_CFG_GBL_2
Configure the output TDC .
TRIGGER: Writing to this byte triggers a read and activation in hardware of all the bytes of the OUTPUT_TDC_CFG module.
OUTPUT_TDC_CFG.OUTPUT_TDC_CFG_GBL_0 Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
FAST_LOCK_ENABLE_D
ELAY[15:0]
R/W
0
Duration to wait after enabling output TDC fast lock.
Unsigned 16-bit value in microseconds. 0 = default 500 microseconds.
When output TDC is enabled, it needs time for the reference clock to settle to
the correct frequency. Fast lock is used to shorten the settling time to within
microseconds compared to milliseconds.
Table 374: OUTPUT_TDC_CFG.OUTPUT_TDC_CFG_GBL_1 Bit Field Locations and Descriptions
Offset
Address
(Hex)
OUTPUT_TDC_CFG.OUTPUT_TDC_CFG_GBL_1 Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
002h
FAST_LOCK_DISABLE_DELAY[7:0]
003h
FAST_LOCK_DISABLE_DELAY[15:8]
OUTPUT_TDC_CFG.OUTPUT_TDC_CFG_GBL_1 Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
FAST_LOCK_DISABLE_D
ELAY[15:0]
R/W
0
Duration to wait after disabling fast lock to allow the output TDC reference clock
time to settle.
Unsigned 16-bit value in microseconds. 0 = default 500 microseconds.
Fast lock is disabled prior to measurement and needs time to settle afterwards.
Table 375: OUTPUT_TDC_CFG.OUTPUT_TDC_CFG_GBL_2 Bit Field Locations and Descriptions
Offset
Address
(Hex)
OUTPUT_TDC_CFG.OUTPUT_TDC_CFG_GBL_2 Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
004h
RESERVED[7:2]
REF_SEL[1]
ENABLE[0]