LM8300IMT9 National Semiconductor, LM8300IMT9 Datasheet
LM8300IMT9
Specifications of LM8300IMT9
Available stocks
Related parts for LM8300IMT9
LM8300IMT9 Summary of contents
Page 1
... On-chip touch screen current drivers - no external driver required n UART interface COP8 ™ trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation self-power down mode, the current drawn is typically less than 2 µA. The device resumes normal operation when a touch is detected on the touch screen or communication is detected on the UART ...
Page 2
Block Diagram * This pin is available in the LM8500 unused in the LM8300. 4.0 Ordering Information LM Family and Feature Set Indicator 8300 = Low Brownout Voltage 8500 = High Brownout Voltage www.national.com Part Numbering Scheme ...
Page 3
General Description ..................................................................................................................................... 1 2.0 Features ....................................................................................................................................................... 1 3.0 Block Diagram .............................................................................................................................................. 2 4.0 Ordering Information .................................................................................................................................... 2 5.0 Connection Diagrams ................................................................................................................................... 4 6.0 Pin Descriptions ........................................................................................................................................... 5 7.0 Absolute Maximum Ratings ......................................................................................................................... 7 8.0 Electrical Characteristics .............................................................................................................................. 7 ...
Page 4
Connection Diagrams * This pin is available in the LM8500 unused in the LM8300. Top View Plastic Chip Package See NS Package Number V44A * This pin is available in the LM8500 unused in the ...
Page 5
Pin Descriptions Pin Name Direction RESET I DTR I WD_OUT O 1 CLK_SET I 2 Unused 2 Unused 2 Unused 2 Unused OSC_OUT O OSC_IN I 2 Unused 2 Unused UART_TX O UART_RX I SHUTDOWN I 2 Unused 2 ...
Page 6
Pin Descriptions Pin Name Direction LED Output 2 Unused 2 Unused 2 Unused Note 1: This is available in the LM8500 only. Note 2: These pins are for future functional expansions. www.national.com (Continued) Pinouts for 44- and 48-Pin Packages ...
Page 7
... Absolute Maximum Ratings 3) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Voltage at Any Pin Total Current into V Pin (Source) CC 8.0 Electrical Characteristics DC Electrical Characteristics (0˚C ≤ T Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. ...
Page 8
Electrical Characteristics DC Electrical Characteristics (0˚C ≤ T Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Parameter Input Capacitance Note 4: Maximum rate of voltage change must be Note 5: Supply and IDLE currents are ...
Page 9
Functional Description LED — Optional LED output. When the controller is oper- ating in normal (non power save) mode, a low is output to the pin. When the controller is in power save mode, a high is output to ...
Page 10
Functional Description Byte Command Byte 2 1 Read stored $B4 calibration points Set focus $B8 $0-$3F value (# of pixels on touch panel) Set # of $BA $01, $02, samples per $04, $08, coordinate (1, $10, ...
Page 11
Functional Description Byte #11: Number of calibration coordinates ( 13) Byte #12: Toggle-flags: Bit #5: calibration coordinates check (0=disabled, 1=enabled) Bit #4: Pressure measurement 1=enabled) Bit #3: Echo mode (0=disabled, 1=enabled) Bit #2: Self Power-Down mode ...
Page 12
Functional Description lines. This option can be used in high noise environments to significantly improve performance and accuracy of the touch screen controller. The default setting is filter path enabled. $A2: Toggle disable/enable self-power down Reply Byte #1: $CA ...
Page 13
Oscillator (Continued) TABLE 1. Crystal Oscillator Configuration 25˚ CKI Freq. C1 (pF) C2 (pF) (MHz 18–36 18–36 The crystal and other oscillator components should be placed in close proximity to ...
Page 14
Averaging Algorithm 12.2 FOCUS ALGORITHM The focus algorithm removes some inaccuracy and noise that could cause the coordinate to differ only by a couple of pixels. The focus algorithm is used to eliminate the "jittering" effect of the pointer ...
Page 15
Brownout Reset (Continued) The internal reset will not be turned off until t to zero. The internal reset will perform the same functions as external reset. The device is guaranteed to operate at the specified frequency down to the ...
Page 16
Calibration (Continued) in Table 3. Two Points Calibration, Table 4. Five Points Calibration, and Table 5. Thirteen Points Calibration respec- tively. FIGURE 5. Two Points Calibration Mapping FIGURE 6. Five Points Calibration Mapping FIGURE 7. Thirteen Points Calibration Mapping ...
Page 17
Calibration (Continued) FIGURE 8. Calibration Procedures with Coordinates Checking Enabled 14.2 CALIBRATION PROCEDURES WITH COORDINATES CHECKING ENABLED calibration with coordinates checking enabled, first ensure the Calibration Coordinates Checking is enabled on the device. This can be ...
Page 18
Calibration (Continued) send a reply byte of $CC to the TS driver. At this point, the TS driver should either notify the user to redo the calibration point or automatically redo the calibration again. If the self- test was ...
Page 19
... Physical Dimensions inches (millimeters) unless otherwise noted LLP Package (LQA) Order Number LM8300HLQ9 or LM8500HLQ9 NS Package Number LQA44A TSSOP Package (MTD) Order Number LM8300IMT9 or LM85009IMT9 NS Package Number MTD48 19 www.national.com ...
Page 20
... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...