Semtech Corporation SH1201
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. SENSOR SUPPORT The SH1201 has built-in profiles to interface with several sensors, some of which are listed here.
| Part No. |
SH1201 |
| Datasheet |
SH1201
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| Manufacturer |
 Semtech Corporation |
| Description |
Force Stick Encoder |
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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.
