Datasheet

Table 24. Conversion Results Registers Description (continued)
READ ONLY
ADDRESS
NAME DESCRIPTION
EEh T4Frac
16-bit fractional value of the time taken to charge the timing capacitor through the RTD
connected to the T4 device pin. This fractional portion is a binary representation of one t
4MHz
period quantized to a 16-bit resolution. The maximum size of the fraction is FFFFh or (2
16
-
1)/2
16
x t
4MHz
.
EFh
Temp_Cycle_
Count
The temp cycle count is an 8-bit binary integer that indicates the number of valid error-free
cycles that either of the EVTMG1 or EVTMG3 commands has executed. It also represents
the number of temperature cycles that have been totaled for the purpose of averaging, which
affects the results provided in the Tx_AVGFrac and Tx_AVGInt registers. It is incremented
every time an error-free temperature command is executed by either the EVTMG1 or EVTMG3
sequence. Because of this internal error checking, once the complete number of cycles dened
by the temperature measurements bits in the Event Timing 2 register has been completed and
the Temp_EVTMG bit has been set in the Interrupt Status register causing the INT device pin
to be asserted (if enabled), the temperature cycle count may not be equal to the setting of the
temperature measurements bits in the Event Timing 2 register.
BIT 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 10 BIT 9 BIT 8
X X X X X X X X
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
MSB
Temp Cycle Count
LSB
F0h T1_AVGInt
15-bit xed-point integer value of the average of the T1 port measurements. It is computed as:
This integer portion is a binary representation of the number of t
4MHz
periods that contribute to
the time results. The maximum size of the integer is 7FFFh or (2
15
- 1) x t
4MHz
.
F1h T1_AVGFrac
16-bit fractional portion of the average of the T1 port measurements. This fractional portion is a
binary representation of one t
4MHz
period quantized to a 16-bit resolution. The maximum size of
the fraction is FFFFh or (2
16
- 1)/2
16
x t
4MHz
.
F2h T2_AVGInt
15-bit xed-point integer value of the average of the T2 port measurements. It is computed as:
This integer portion is a binary representation of the number of t
4MHz
periods that contribute to
the time results. The maximum size of the integer is 7FFFh or (2
15
- 1) x t
4MHz
.
Temp_Cycle_Count
Temp_Cycle_Count
T1
n
n = 1
Temp_Cycle_Count
Temp_Cycle_Count
T2
n
n = 1
MAX35101 Time-to-Digital Converter with Analog Front-End
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