MAX11800_10 Datasheet, PDF (51/57 Pages) Maxim Integrated Products – Low-Power, Ultra-Small Resistive Touch-Screen Controllers with I2C/SPI Interface

Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I²C/SPI Interface
Touch-Detect Pullup Timing Configuration Register (0x07)
NAME
DEFAULT
BIT 7
0
BIT 6
BIT 5
PUR[3:0]
0
0
BIT 4
0
BIT 3
0
BIT 2
BIT 1
PUF[3:0]
0
0
BIT 0
0
BIT
NAME
DESCRIPTION
7:4
PUR[3:0]
3:0
PUF[3:0]
Rough pullup time (t_PUR)
0000: 2μs*
1000: 1ms
0001: 2μs
1001: 2ms
0010: 4μs
1010: 5ms
0011: 8μs
1011: 10ms
0100: 10μs
1100: 20ms
0101: 50μs
1101: 50ms
0110: 100μs
1110: 100ms
0111: 500μs
1111: 200ms
Fine pullup time (t_PUF)
0000: 10μs
1000: 1ms
0001: 20μs
1001: 2ms
0010: 50μs
1010: 5ms
0011: 80μs
1011: 10ms
0100: 100μs
1100: 20ms
0101: 200μs
1101: 50ms
0110: 500μs
1110: 100ms
0111: 800μs
1111: 200ms
Note: These settings apply to the end of all measurement and combined commands and are required for proper data tagging and
interrupt management. The exception is direct conversion commands with CONT = 1. These commands do not enter PUR/PUF inter-
vals for the purpose of data tagging.
*While 2μs is the minimum PUR interval listed, for this setting, the XPSW is not engaged, allowing for minimal power operation
(essentially adding 2μs to the PUF time).
Autonomous Mode Timing Configuration Register (0x08) (MAX11800/MAX11801)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
NAME
TINIT[3:0]
SCANP[3:0]
DEFAULT
0
0
0
0
0
0
0
0
BIT
NAME
DESCRIPTION
7:4
TINIT[3:0]
3:0
SCANP[3:0]
Initial period (time between touch and initial scan block, t_INIT)
0000: 10μs
1000: 1ms
0001: 20μs
1001: 2ms
0010: 50μs
1010: 5ms
0011: 80μs
1011: 10ms
0100: 100μs
1100: 20ms
0101: 200μs
1101: 50ms
0110: 500μs
1110: 100ms
0111: 800μs
1111: 200ms
Scan period (time between successive scan blocks, t_SP)
SCANP[3:0] has the same range as TINIT[3:0] above.
Note: These settings apply in autonomous conversion mode only.
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