Philips target board lpc2138 Manuel D’Utilisation
Jumper & Connector Descriptions
• J1, J2: LCD LED Backlight Polarity: If J1 and J2 is set in position 1-2, then LCD pin15 is connected
to +5V and pin16 is connected to GND. If J1 and J2 is set in position 2-3 then pin15 is connected to
GND and pin16 is connected to +5V. Default set in position 1-2.
GND and pin16 is connected to +5V. Default set in position 1-2.
• J7: Trace Port Enable: J7 is set to enable pins P1.25:16 to operate as ETM Trace port after reset.
Default not set.
• J8: Debug Port Enable: J8 is set to enable pins P1.31:26 to operate as a JTAG Debug port after reset.
Default is set.
• J9: Debug Mode: J9 selects whether iSYSTEM on-board integrated USB-JTAG debugger is used or an
external debug tool. Default set in position 1-2.*
• J10: RTC Power Supply Selector: J10 connects Vbat pin of LPC2138 to the main 3.3V.
• P11: RTC Power supply: PCB terminal providing connection for battery. When battery power supply
applied to P11 is used, J10 must be open.
• P12: Manufacturing purpose connections
• P13: Analog Output: P13 is analog output from OP amplifier, which connects to output of the DA
converter.
• J15: User LEDs Enable: enables the LED driver connecting the on-board LEDs to GPIO P0.4 – P0.7.
• J16: User Buttons Enable: enables buttons driver connecting the on-board buttons to GPIO P0.12 –
P0.15. Pushing the button generates a low signal. If J16 is set, the CPU will not start in Boot-loader
mode (see J25 description).
mode (see J25 description).
• J17: LCD Enable Signal: connects GPIO P0.21 to the LCD enable pin.
• J18: LCD R/W Signal: connects GPIO P0.22 to the LCD R/W pin.
• J19: Analog Output Enable: connects DA converter output (GPIO P0.25) to the OP amplifier.
• J20: Analog Input Enable: connects the TRIM potentiometer to the analog input AD0.0 (GPIO
P0.27).
• P21: 16 Pin LCD Connector: see connectors
• J22: LCD LED Backlight Enable: J22 is set to turn on LCD backlight.
• J25 (bottom side): Startup mode (populated on the bottom side of the target board): J25 connects
either a pull-up (USER mode) or a pull-down (BOOT-loader mode) to P0.14. Default set in position
USER (User mode). J16 must be removed when setting J25 in position BOOT, otherwise J25 setting is
not effective.
USER (User mode). J16 must be removed when setting J25 in position BOOT, otherwise J25 setting is
not effective.
*Jumper pin 1 is marked with a white square on the ITLPC2138 PCB. If pin 1 cannot be located directly from
the ITLPC2138, please use Figure 2 for assistance.
the ITLPC2138, please use Figure 2 for assistance.
Note: Don’t change jumper settings while the target board is supplied with power!
© iSYSTEM, March 2007
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