MAX11803 Maxim Integrated Products, MAX11803 Datasheet - Page 48

• Manufacturer Part Number: MAX11803
• Description: (MAX11800 - MAX11803) Ultra-Small Resistive Touch-Screen Controllers
• Manufacturer: Maxim Integrated Products

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Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I
General Configuration Register (0x01)
Measurement Resolution Configuration Register (0x02)
48
NAME
DEFAULT
NAME
DEFAULT
______________________________________________________________________________________
BIT
BIT
1:0
3:0
7
6
5
4
3
2
4
RT_SEL
HOLD_DO
PU_IRQ
ODN_IRQ
MASK_IRQ
EDGE_IRQ
EDGE_TIME[1:0]
PWR_SAV
RES_
RT_SEL
BIT 7
BIT 7
—
1
0
NAME
NAME
HOLD_DO
BIT 6
BIT 6
—
1
0
0: 50k
1: 100k
(panel setting––not to be confused with internal
0: DOUT internal bus holder disabled
1: DOUT internal bus holder enabled
(applicable to SPI version only)
0: Disable IRQ internal pullup resistance
1: Enable IRQ internal pullup resistance
(open-drain mode only: ODN_IRQ also high)
0:
1:
0: Enable
1: Mask/disable
0: Use continuous interrupt with direct conversion mode
1: Use edge interrupt with direct conversion mode
00: 4 x (2MHz oscillator clock period) = 2μs
01: 16 x (2MHz oscillator clock period) = 8μs
10: 64 x (2MHz oscillator clock period) = 32μs
11: 128 x (2MHz oscillator clock period) = 128μs
0: Internal ADC runs at normal power
1: Internal ADC runs at reduced power and resolution
This mode does limit the effective ADC resolution:
12-bit conversions may be reduced to 10-bit accuracy
8-bit conversions should not be impacted.
Resolution for X, Y, Z1, or Z2 measurements
0: 12-bit conversion (see the PWR_SAV description in this table)
1: 8-bit conversion
PU_IRQ
2
BIT 5
BIT 5
—
C/SPI Interface
1
low time for edge interrupt mode only
0
is CMOS buffered output
is open-drain nMOS output
touch-detection pullup resistance
touch-detection pullup resistance
output
ODN_IRQ
PWR_SAV
BIT 4
BIT 4
1
0
output (force high or high impedance)
MASK_IRQ
BIT 3
RESX
BIT 3
0
0
DESCRIPTION
DESCRIPTION
EDGE_IRQ
BIT 2
RESY
BIT 2
0
0
pullup)
RESZ1
BIT 1
BIT 1
EDGE_TIME[1:0]
0
0
RESZ2
BIT 0
BIT 0
0
0