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Details, datasheet, quote on part number:SH1201
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| Part: | SH1201 |
| Category: | Interface and Interconnect => Keyboard & Mouse Controllers => Mouse encoder |
| Description: | PixiPoint® Advanced “Click-to-Select” No-Drift™ Force Stick Encoder |
| Company: | Semtech Corporation |
| Datasheet: | Download SH1201 datasheet File size : 168 kB |
| Request For quote: | Find where to buy SH1201
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Datasheet text preview:
PixiPoint® SH1201 Advanced "Click-to-Select" No-DriftTM Force Stick Encoder
HID & SYSTEM MANAGEMENT PRODUCTS, MOUSECODER® FAMILY DESCRIPTION The PixiPoint® SH1201 mouse encoder is a cost-effective, highfunctionality IC that interfaces a force-stick sensor to a PS/2 or serial port. Ideal for laptop or palmtop use, the low-power PixiPoint® uses an advanced algorithm for enhanced motion control. The IC can be configured as a standard 3-button mouse or as a wheel mouse. The IC provides an extra port for hot-plug connection of an external PS/2 mouse, including one with wheel function. The embedded sensor and the external device can operate concurrently. The PixiPoint® includes a signal conditioning circuit for a low cost, simple and real estate-saving implementation. Just a few lowtolerance external components are needed. Typically consuming less than 4.5 mA, the PixiPoint® is ideal for battery-operated systems. PS/2 communication is bidirectional at 10 Kbps. The PixiPoint® returns up to 100 mouse reports per second, and is compatible with the standard twobutton mouse protocol, the standard three-button mouse protocol, and the standard wheel mouse protocols. It implements all commands from and to the system (as defined in the IBM PS/2 mouse communication protocol). The PixiPoint® also implements most of the IBM force stick extended commands, and works with most IBM force stick drivers. FEATURES · Advanced motion control algorithm provides accurate cursor control · Can be configured for PS/2 or RS232 serial communication with the host · Can be configured as a standard 3-button mouse or a wheel mouse · Complies with the Microsoft® Plug and Play External COM Device specification · Click (select), double-click (execute), and slow drag are implemented in the IC no special driver support is required · Provides built-in profiles to interface popular force-stick sensors from several manufacturers APPLICATIONS · Notebooks/laptops · Handhelds PIN ASSIGNMENTS · Keyboards · Instrumentation · Supports hot-plug connection of a standard external PS/2 mouse, with or without wheel function · Works with standard Windows® mouse drivers · Works with most IBM force stick drivers · CleanStopTM feature means cursor stops where it should · In PS/2 mode, supports all standard PS/2 commands · Royalty-free and cost-effective · Low power consumption: 4.5 mA (typical) · 2.7 V5.5 V operation over extended temperature range
_RB _PS2SEL TxD _REGDIS OFFSET SWPWR2 AD ZM
32 1 25 24
XP YM XM YP VREF _RESET VSS2 VDD
8 9 16 17
_MB/_UB _LB _DB FDA CDA XYGSEL MDAT/RTS EMCLK
SENSSEL SWPWR1 EMDAT MCLK SWPWR0 VSS _OSCOUT OCSIN
Semtech, the Semtech logo, PixiPoint, PixiCoder, MouseCoder, CleanStop, EasyDrag, No-Drift, and MicroBuddy are marks of Semtech Corporation. All other marks belong to their respective owners. Copyright ©1999-2003 Semtech Corporation SH1201 data sheet v1.12 (2003-04)
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ORDERING CODE SH1201-FG sh1201tr.pdf LQFP 32-pin, 0.8 mm pitch Document: PixiPoint® Technical Reference (Extended PS/2 Protocol)
BLOCK DIAGRAM
Left, Middle/Up, Right, & Down Buttons
4
Data Buffer
Switch Interface
Digital / Analog
2
MCLK MDAT
Host PS/2 Communication Port
X Input
Analog Signal Input
Y Input
TxD
Host Serial Communication Port
Z Input
5
Drive pins
RTS
Control
EMCLK EMDAT
External PS/2 Port
PixiPoint® Interface 16-bit Timer
Power-on Reset Oscillator Circuit
2
OSCIN-OSCOUT
Copyright ©1999-2003 Semtech Corporation SH1201 data sheet v1.12 (2003-04)
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FUNCTIONAL DESCRIPTION The SH1201 consists functionally of several major sections (see the block diagram on the previous page). These include the PixiPoint® interface, the 16-bit timer, the oscillator circuit, the host PS/2 communication port, the host serial communication port, and the external PS/2 port. All sections communicate with each other and operate concurrently. SENSOR SUPPORT The SH1201 has built-in profiles to interface with several sensors, some of which are listed here. A profile is selected by tying the SENSSEL line (pin 16) to the indicated line. CTS 106 - floating CTS 109 - ground CTS 105 - XP (pin 1) K-Tech 3.2 - YM (pin 2)
PIN DEFINITIONS
Mnemonic VDD VSS VSS2 _RESET _OSCOUT Pin # 8 11 7 6 10 Type P P P I O Name and Function Power supply: 2.7 V5.5 V (depends on host interface mode) Ground Ground Reset: apply 0V for orderly start-up Oscillator output: open for external clock input or one side of the ceramic resonator with built-in load capacitors Oscillator input: external clock input or one side of the ceramic resonator with built-in load capacitors Host PS/2 clock Host PS/2 data / serial request-to-send input external mouse External mouse clock: PS/2 clock signal from external mouse External mouse data: PS/2 data signal from external mouse Serial transmit to host: idle high Down button: active low, strobed sampling Left button: active low, strobed sampling Middle/up button: active low, strobed sampling Right button: active low, strobed sampling Analog to digital converter input Sensor select pin: normally left floating Regulator disable/enable (low = disable) Reference voltage for built-in A/D X minus drive pin X plus drive pin Y minus drive pin Y plus drive pin Z minus drive pin XY gain 100% floating, 75% tied to ground, 50% tied to SWPWR2, 125% tied to REGDIS Coarse digital-to-analog Fine digital-to-analog Interface select: tie to ground for PS/2 host, tie to power (Vcc) for serial host Offset: resets the offset circuit during inactivity Switched power driver Switched power driver: connect to SPWR0 Switched power driver: connect to SPWR0
OSCIN MCLK MDAT/RTS EMCLK EMDAT TxD _DB _LB _MB/_UB _RB AD SENSSEL _REGDIS VREF XM XP YM YP ZM XYGSEL CDA FDA _PS2SEL OFFSET SWPWR0 SWPWR1 SWPWR2
9 13 18 17 14 27 22 23 24 25 31 16 28 5 3 1 2 4 32 19 20 21 26 29 12 15 30
I I/O (nd) I/O (nd) I/O (nd) I/O (nd) O I/O I/O I/O I/O AI I/O I/O AI I/O I/O I/O I/O I/O I O O I I/O I/O I/O I/O
(nd) (nd) (nd) (nd) (nd) (nd)
SENSOR Z-AXIS SUPPORT The SH1201 has built-in Z-axis functionality to recognize click and double-click on the force stick itself. Z-axis functionality depends on an appropriate resistor Rz at the sensor input (R4 in the mode schematics, R4, R12, or R11 in the evaluation board schematic in this data sheet) whose value is one half the resistance of one strain gauge of the sensor. Omitting this resistor and leaving this connection open disables Z-axis functionality. Rz values: CTS 106 - 1.6 K CTS 109 - 1.24 K CTS 105 - 1.6 K K-Tech 3.2 - 1.6 K
Note: An underscore before a pin mnemonic denotes an active low signal. Pin types legend: P = power, AI = analog input; I = input; O = output; I/O = input or output; I/O (nd) = input or output with N-channel open drain driver
POWER AND EXTERNAL PS/2 SPEED BY HOST INTERFACE Serial host interface High-speed PS/2 host 2.7 V5.5 V power supply interface external PS/2 port speed: 4 V5.5 V power supply 60 reports/second maximum external PS/2 port speed: 100 reports/second maximum Note: Embedded (internal) pointer speed is 100 Low-speed PS/2 host reports/second maximum for all interface interface types 2.7 V5.5 V power supply external PS/2 port speed: 60 reports/second maximum 3
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Copyright ©1999-2003 Semtech Corporation SH1201 data sheet v1.12 (2003-04)
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