Datasheet

Table 20. Calibration and Control Register (continued)
BIT NAME DESCRIPTION
10 CMP_SEL
Comparator/UP_DN Output Select: This bit selects the output function of the CMP_OUT/UP_DN
pin and is only used when CMP_EN = 1.
1 = CMP_EN: The output monitors the receiver front end comparator output.
0 = UP_DN: The output monitors the launch direction of the pulse launcher.
High Output: Upstream measurement (Launch_UP to STOP_UP)
Low Output: Downstream measurement (Launch_DN to STOP_DN)
9 INT_EN
Interrupt Enable: This bit, when set, enables the INT pin. All interrupt sources are wire-ORed to
the INT pin.
8 ET_CONT
Event Timing Continuous Operation: This bit, when set, causes the currently executing EVTMGx
command to continuously execute until the HALT command is received by the MAX35101.
This bit, when cleared, causes:
• The currently executing EVTMG1 command to run one sequence of TOF_DIFF
measurement cycles and/or one sequence of temperature measurement.
• The currently executing EVTMG2 command to run one sequence of TOF_DIFF
measurements cycles.
• The currently executing EVTMG3 command to run one sequence of temperature
measurement cycles.
7 CONT_INT
Continuous Interrupt: This bit, when set, causes the currently executing EVTMGx command to
assert the INT pin (if enabled) after every TOF_DIFF or temperature measurement cycle. This
allows the host microprocessor to interrogate the current event for accuracy of measurements and
hit data.
When this bit is cleared, the currently executing EVTMGx command interrupt generation behavior
is controlled only by the setting of the ET_CONT bit.
6:4 CLK_S[2:0]
Clock Settling Time: These bits dene the time interval that the MAX35101 waits after enabling
the 4MHz clock for it to stabilize before making any measurements of time or temperature.
CLK_S2 CLK_S1 CLK_S0
DESCRIPTION
32kHz CLOCK CYCLES TYPICAL TIME
0 0 0 16 488µs
0 0 1 48 1.46ms
0 1 0 96 2.93ms
0 1 1 128 3.9ms
1 0 0 168 5.13ms
1 0 1 4MHz oscillator on continuously
1 1 0 4MHz oscillator on continuously
1 1 1 4MHz oscillator on continuously
MAX35101 Time-to-Digital Converter with Analog Front-End
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