User manual

JUMPER DESCRIPTION:
USB_PWR_3.3
This jumper, when is closed, connects PIC18F14K50 pin 17 (VUSB) – signal
USB_VBUS, to VCC (3.3V).
Default state is opened.
UEXT_PWR_3.3
This jumper, when is closed, connects UEXT pin 1 to VCC (3.3V). When MOD-USB-
RS232 is used in host mode – this jumper must be closed, because the other module
will be power supplied via MOD-USB-RS232.
Default state is opened.
3_RX/3_TX
This jumper, when is in position 3_RX, connects UEXT pin 3 to PIC18F14K50 pin 12
(RB5/AN11/RX/DT). When this jumper is in position 3_TX, connects UEXT pin 3 to
PIC18F14K50 pin 10 (RB7/TX/CK).
Default state is 3_RX shorted.
4_TX/4_RX
This jumper, when is in position 4_TX, connects UEXT pin 4 to PIC18F14K50 pin 10
(RB7/TX/CK). When this jumper is in position 4_RX, connects UEXT pin 4 to
PIC18F14K50 pin 12 (RB5/AN11/RX/DT).
Default state is 4_TX shorted.
In default state jumpers 3_RX/3_TX and 4_TX/4_RX are configured for device
mode.
INPUT/OUTPUT:
Status Led (red) with name STAT connected to PIC18F14K50 pin 14
(RC2/AN6/P1D/C12IN2-/CVREF/INT2).
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