MK715R Ver la hoja de datos (PDF) - Integrated Circuit Systems
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MK715R Datasheet PDF : 22 Pages
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MK715
Register Description
The MK715 has four 12 bit registers. However, only 8 bits in each register can be written (D0-D7). The other 4 bits (D8-
D11) can never be written and are always read only.The RESULT register contains 2 levels, a read only level and a write
only level. Reading this register gives the conversion results. Writing this register changes 4 control bits.
DESCRIPTION STATUS (ADDRESS 0)
Read
and
11 10 9 8 7 6 5 4 3 2 1 0
Write
RD1PT. Read one point. Cleared when
conversion complete.
ENCONR. Enable periodic screen conversions
at rate set by RATE register.
PD. Power Down. Chip powers down. See
CONTROL register bit 7.
ENPLL. Overrides automatic powerdown of
PLL between conversions and forces
continuous running.
SELGP. Select GP input to ADC.
SELPL. Select PL input to ADC.
Touch Status. 1 = touch.
Conversion complete. Cleared on next read
of RESULT register.
Always set to zero.
Power-up
TYPE State
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
RO
0
RO
0
RO
0
Read
and
Write
RATE (ADDRESS 1)
11 10 9 8 7 6 5 4 3 2 1 0
Controls frequency of screen conversions
when periodic conversions are enabled.
Always set to zero.
R/W
32
RO
0
Read
Write
RESULT (ADDRESS 2)
11 10 9 8 7 6 5 4 3 2 1 0
RESULT (ADDRESS 2)
11 10 9 8 7 6 5 4 3 2 1 0
10-bit conversion result.
XSEL. Screen conversion status. 0 = Y
coordinate, 1 = X coordinate.
Conversion type. 0 = non-screen
conversion, 1 = screen conversion.
RO
X
RO
0
RO
1
RDPRESA. Read pressure A. See
description of measuring touch pressure.
WO
0
RDPRESB. Read pressure B. See
description of measuring touch pressure.
WO
0
PLZERO. Forces PL pin to ground. Can be
WO
0
used to control an external resistor divider.
Test mode. ALWAYS WRITE TO 0.
Don't Care.
WO
0
-
X
6
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