MK712RTR Просмотр технического описания (PDF) - Integrated Circuit Systems
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MK712RTR Datasheet PDF : 16 Pages
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I CR O C LOC K
Register Description
MK712
Touch Screen Controller
The MK712 register set is designed to be compatible with the Gazelle pen digitizer registers allowing a
software driver for the Gazelle digitizer to be used with the MicroClock MK712. The eight 8-bit registers
are defined below:
STATUS LOW (0 READ)
7 65 4 3 2 1 0
Always zero
1 = touch
Always zero
1 = conversion complete,
cleared on Y-HIGH read
NOTE: When the screen is touched bits 4 and 5,
register 0, and bits 2 and 3 of register 1 are all set to one.
STATUS HIGH (1 READ)
7 65 4 3 21 0
Always zero
1 = touch
Always zero
X-LOW (2 READ)
7 65 4 3 2 1 0
Low order bits of X co-ordinate
X-HIGH (3 READ)
7 65 4 3 2 1 0
High order bits of X co-ordinate
Always zero
Y-LOW (4 READ)
7 65 4 3 2 1 0
Low order bits of Y co-ordinate
Y-HIGH (5 READ)
7 65 4 3 2 1 0
High order bits of Y co-ordinate
Always zero
CONTROL (6 R/W)
7 65 4 3 2 1 0
1 = enable interrupts
1 = interrupt on conversion
complete ( if bit 0 = 1)
1 = interrupt on change in
touch status (if bit 0 = 1)
1 = interrupt on change in
touch status (if bit 0 = 1)
1 = enable periodic conversions at
rate indicated by RATE register
1 = read one point. Cleared when
conversion complete. Only functions
when bit 4 = 0
0 = powerdown (PD). Conversions,
interrupts and TOUCH output disabled
1 = powerdown (PD). Conversions,
interrupts and TOUCH output
disabled.
NOTE: Bits 2 or 3 and bits 6 or 7 are logically OR’d. For
example writing bit 2 or bit 3 to a one will enable interrupts
on change in touch status.
RATE (7 R/W)
7 65 4 3 2 1 0
Count controls frequency of
conversion when periodic
conversions are enabled. See
table on page 5.
MDS 712 I
4
Revision 100899 Printed 11/16/00
Integrated Circuit Systems, Inc.•525 Race St.•San Jose•CA•95126•(408)295-9800tel•www.icst.com
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