2. Panel-Card EVB

The Panel-Card EVB (Evaluation Board) is designed to be both simple and universal. Some elements of the circuit board will not always be needed, but facilitate implementation for certain purposes. It was designed to serve the Panel-Card and other products as an evaluation platform.

2.1. First Steps

The Starter Kit board "Panel-Card EVB" makes it easy to put the module to use. The first steps involve the following:

  • connecting the wall adapter to the main supply and to the board

  • connecting the DBGU-Adapter and the serial cable to a COM port of a PC

  • starting a terminal program for the selected COM port at 115200 baud, 8N1

  • starting the module by flipping the power switch

  • boot messages of the module are now expected to appear on the terminal

2.2. Power Supply

From an unregulated input voltage between 8 and 35V two voltages are produced:

  • 3.3V for the CPU module,

  • 5V for USB and optional peripherals

2.3. RS232 Interface

The RS232 port provides RS232 drivers/receivers for the RxD, TxD, RTS, CTS, RI and DCD signals of the one USART of the module. It is connected to X4 DSUB-9 connector on the EVB.

The RxD and TxD lines of the module's "Debug UART" are connected to X25 Debug on EVB. To use the console port of the Stamp9261, which usually is identical to the Debug UART, the serial adaptor cable has to be used. It connects the PC's TxD, RxD, and Ground lines to the appropriate pins of X25 Debug of the EVB.

2.4. Connectors

The following connectors are part of the Panel-Card EVB:

  • Two 40-pin header connectors (0.1 inch pitch)

  • Ethernet 10/100 MBit

  • USB Host (dual)

  • USB Device

  • RS232

  • MMC-Card Slot

  • Matrix keyboard

  • JTAG

  • User Connector D-type 25pin

  • User Connector 26pin header (optional)

  • 2-contact terminal block for power supply

  • DC connector for power supply

2.5. Rotary Encoder

The Panel-Card EVB includes a rotary encoder with push-button which is a "Human Interface Device" well suited for many embedded applications. Generally spoken, it is a simplified replacement for a computer mouse, touch pad, or keyboard. The rotary encoder represents a pointing device with only one dimension, while the push-button serves as a "return" key or mouse button.

The rotary encoder is accessed by two PIO ports of the module (see circuit diagram). The push-button occupies another PIO port.

2.6. Touch Controller

The Panel-Card EVB implements a ADS7843 Touch controller. It is connected to SPI of the module. The touch controller and the rotary encoder can only be used mutually exclusive. Connect jumper J2 to ID for the rotary encoder and to TP for touch.

2.7. Schematics

The following circuit diagram is intended for reference only and does not dispense the user from checking and applying the appropriate standards. No warranty can be granted if parts of the circuit are used in customer applications.

Figure 6.1. Panel-Card EVB Schematics Bus/JTAG


Figure 6.2. Panel-Card EVB Schematics USB/RS232


Figure 6.3. Panel-Card EVB Schematics Power Regulation


Figure 6.4. Panel-Card EVB Schematics Connectors


Figure 6.5. Panel-Card EVB Schematics HID