MK715R 데이터 시트보기 (PDF) - Integrated Circuit Systems
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MK715R Datasheet PDF : 22 Pages
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MK715
Register Description (cont.)
DESCRIPTION CONTROL (ADDRESS 3)
Read
and
11 10 9 8 7 6 5 4 3 2 1 0
Write
SEL0. Clock select 0. See page 11.
SEL1. Clock select 1. See page 11.
SEL2. Clock select 2. See page 11.
SEL3. Clock select 3. See page 11.
SEL4. Clock select 4. See page 11.
CLKSEL. Clock frequency select.
See page 11. 0 = 14.3196 MHz
1 = 14.7456 MHz
Set to 0.
Power-up
TYPE State
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
DIS32. Determines state of 32.768 kHz
R/W
0
oscillator when PD asserted (STATUS register).
Always set to zero.
RO
0
R/W = Read/Write, RO = Read Only, WO = Write Only
Converter Control
RDPRESB RDPRESA SELPL SELGP ENCONR RD1PT CONVERSION PERFORMED
Performs 2 conversions on the
0
0
0
0
0
0 to 1 screen - a Y and then an X
conversion. RP1PT is then cleared.
Enable conversions at rate as set
in RATE register. When screen is
0
0
0
0
1
0
touched, converter operates
continously until no touch is
detected. Chip then automatically
goes to low power, standby state.
0
0
0
1
0
0 to 1
Performs one conversion on GP
input. RD1PT is cleared.
0
0
1
0
0
0 to 1
Performs one conversion on PL
input. RD1PT is cleared.
Performs two conversions, a Y and
then an X, to give touch pressure
0
1
0
0
0
0 to 1 data. See section on touch
pressure measurement. RD1PT is
cleared.
Performs two conversions, a Y and
then an X, to give touch pressure
1
0
0
0
0
0 to 1 data. See section on touch
pressure measurement. RD1PT is
cleared.
The converter must be sequenced correctly - before writing RD1PT to one, the appropriate bit (e.g. SELGP) must
first be set in a previous write. Only the combinations shown above are permitted. Other combinations will give
unpredictable behavior.
7
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