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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.
Table 10. Proximity Pulse Count Register
7
6
5
4
3
2
1
0
PPULSE
FIELD
BITS
PPULSE
DESCRIPTION
Address
0x0E
PPULSE
7:0
Proximity Pulse Count. Specifies the number of proximity pulses to be generated.
Control Register (0x0F)
The Control register provides four bits of control to the analog block. These bits control the diode drive current
and diode selection functions.
Table 11. Control Register
7
6
5
4
3
2
1
0
CONTROL
PDRIVE
Resv PDIODE
Reserved
Address
0x0F
FIELD
PDRIVE
PDIODE
Reserved
BITS
7:6
5:4
3:0
DESCRIPTION
LED Drive Strengt h.
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.
NOTE: The PDRIVE values are relative to the factory-trimmed current necessary to meet the Prox Coun
specification shown on page 4.
The LUMENOLOGY r Company
r
www.taosinc.com
r
Copyright E 2012, TAOS Inc.
19
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