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LM8300 Datasheet(PDF) 10 Page - National Semiconductor (TI) |
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LM8300 Datasheet(HTML) 10 Page - National Semiconductor (TI) |
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10 / 20 page  9.0 Functional Description (Continued) PC Command PC Byte 1 PC Byte 2 TSC Byte 1 TSC Byte 2 Read stored calibration points $B4 $CA Section 9.3.3 Advanced Command Bytes Descriptions Set focus value (# of pixels on touch panel) $B8 $0-$3F $CA $00-$3F Set#of samples per coordinate (1, 2, 4, 8, 16, 32) $BA $01, $02, $04, $08, $10, $20 $CA $01, $02, $04, $08, $10, $20 Set communication mode (stream, touchdown, liftoff) $BB $01, $02, $04 $CA $01, $02, $04 Set max delta (# of pixels from predicted coordinate) $BC $00-$3F $CA $00-$3F Set calibration points $BD Section 9.3.3 Advanced Command Bytes Descriptions $CA Section 9.3.3 Advanced Command Bytes Descriptions Set minimum pressure $BE $00-$7F $CA $00-$7F Toggle disable/enable external filter path $A0 $CA $00, $01 Toggle disable/enable self power-down $A2 $CA $00, $01 Toggle disable/enable echo mode $A3 $CA $00, $01 Toggle disable/enable pressure measurements $A4 $CA $00, $01 PC Command PC Byte 1 PC Byte 2 TSC Byte 1 TSC Byte 2 Toggle disable/enable calibration coordinate check $A5 $CA $00, $01 Wakeup $A7 Shutdown $A8 $CA Soft reset $AF $CA $CB, $CC TSC Replies Timeout $CF Re-send $CE Self test failed $CC Self test ok $CB Acknowledge $CA Calibration coordinates ok $C4 Error / buffer overrun $C8 Software version $C7 $0-$7F Data transmit $80/$90 Payload (3/4 bytes) 9.3.3 Advanced Command Bytes Descriptions Unless otherwise mentioned, all values are in hex. $B0: Read clock-speed Reply Byte #1: $CA (Acknowledge) Byte #2: Clock readout (0 = 3.3MHz, 1 = 10MHz) CLK_SEL pin tells the firmware which oscillator speed is used. If the CLK_SEL input pin is floating or pulled high a 10.0MHz oscillator must be connected. If the pin is pulled low a 3.3MHz oscillator must be connected. This command enables the driver software to determine which oscillator speed is used with the touch screen controller, as this deter- mines the maximum coordinate pair per second data rates. Note: This is available in the LM8500 only. $B1: Read parameters Reply Byte #1: $CA (Acknowledge) Reply Byte #2: First byte in software version number, year 20 (00-99) Reply Byte #3: Communication mode (1 = stream, 2 = touchdown, 4 = liftoff) Byte #4: Wakeup on touch (0 = disabled, 1 = enabled) Reply Byte #5: Number of samples (1,2, 4, 8, 16 or 32) Byte #6: Clock readout (0 = 3.3MHz, 1 = 10MHz) Byte #7: Second byte in software version number, month (1-12) Byte #8: Third byte in software version number, day (1-31) Byte #9: Focus value (0-63) Byte #10: Max delta (0-63) www.national.com 10 |
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Descripción similar - LM8300 |
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