TMD26713 Datasheet, PDF (20/29 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – DIGITAL PROXIMITY DETECTOR

TMD2671
DIGITAL PROXIMITY DETECTOR
TAOS144B − SEPTEMBER 2012
Proximity Pulse Count Register (0x0E)
The proximity pulse count register sets the number of proximity pulses that will be transmitted. PPULSE defines
the number of pulses to be transmitted at a 62.5-kHz rate.
While the value can be programmed up to 255 pulses, the practical limit of the device is 32 pulses. It is
recommended that 32 or fewer pulses be used to achieve maximum signal-to-noise ratio.
lid PPULSE
FIELD
a _PPULSE
7
BITS
7:0
Table 10. Proximity Pulse Count Register
6
5
4
3
2
1
0
PPULSE
DESCRIPTION
Proximity Pulse Count. Specifies the number of proximity pulses to be generated.
Address
0x0E
v _{Control Register (0x0F)}
ill ^{The Control register provides four bits of control to the analog block. These bits control the diode drive current}
and diode selection functions.
t _{Table 11. Control Register}
G _{s 7}
6
5
4
3
2
1
0
A ^t _CONTROL
PDRIVE
ResvPDIODE
Reserved
Address
0x0F
s ⁿ FIELD
e _PDRIVE
amcont _PDIODE
ical _Reserved
BITS
7:6
5:4
3:0
DESCRIPTION
LED Drive Strength.
FIELD VALUE
LED STRENGTH
00
100%
01
50%
10
25%
11
12.5%
Proximity Diode Select.
FIELD VALUE
DIODE SELECTION
00
Reserved
01
Proximity uses the Channel 0 diode
10
Proximity uses the Channel 1 diode
11
Proximity uses both diodes
Reserved. Write bits as 0.
n _{NOTE: The PDRIVE values are relative to the factory-trimmed current necessary to meet the Prox Coun}
Tech ^{specification shown on page 4.}
The LUMENOLOGY r Company
r
r
www.taosinc.com
Copyright E 2012, TAOS Inc.
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