TDC-GP2 acam messelectronic gmbh, TDC-GP2 Datasheet - Page 17

• Manufacturer Part Number: TDC-GP2
• Description: Precision Time Interval Measurement
• Manufacturer: acam messelectronic gmbh

2.6.3 Status register
The TDC-GP2 provides a 16 bit status register.
Bits
STATUS Register
2 – 0
5 – 3
8 – 6
9
10
11
12
a. Measurement range 1 with calibrated data (Calibrate = 1)
b. Measurement range 1 without calibration (Calibrate = 0, )
c. Measurement range 2
The results are given in multiples of the internal reference clock (= external reference clock divided by 1, 2 or 4
(DIV_CLKHS)). Calibrated data are 32 bit fixed point numbers with 16 integer bits and 16 fractional bits. Any
calibrated result covers therefore 1 result register. The serial output begins with the highest bit (2
with the lowest one (2
Non-calibrated data are of the type 'Signed Integer' and are stored as a 16 bit value in the high word of the
result registers. The bits of the low word are set to zero. The result is represented as number of LSB and is
available in complements of 2.
In measurement range 2 the TDC-GP2 only supports calibrated measurement. The results are given in
multiples of the internal reference clock (= external reference clock divided by 1, 2 or 4 (DIV_CLKHS)).
Calibrated data are 32 bit fixed point numbers with 16 integer bits and 16 fractional bits. Any calibrated result
covers therefore 1 result register. The serial output begins with the highest bit (2
one
Time
Time
Time
Time
Pointer result
register
# of hits Ch 1
# of hits Ch 2
Timeout TDC
Timeout Precounter
Error open
Error short
Name
acam-messelectronic gmbh - Am Hasenbiel 27 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de
RES
(2
RES
2
RES
- 1 6
T
_
_
_
ref
). The numbers are available in complements of 2.
X
X
X
2
LSB
T
T
ClkHSDiv
ref
ref
2
2
RES
ClkHSDiv
ClkHSDiv
- 1 6
). The numbers are available in complements of 2.
_
Description
Pointer to the next free result register
Number of hits registered on channel 1
Number of hits registered on channel 2
Indicates an overflow of the TDC unit
Indicates an overflow of the 14 bit precounter in MR 2
Indicates an open sensor at temperature measurement
Indicates a shorted sensor at temperature measurement
X
RES
RES
65
ps
_
_
X
X
T
T
ref
ref
N
N
, with N = 1, 2 or 4
, with N = 1, 2 or 4
17
1 5
) and ends with the lowest
2.6 Regi ster setti ngs
TDC-GP2
1 = open
1 = short
Values
1 = overflow
1 = overflow
1 5
) and ends