CEC1x02 Development Board
User’s Guide
2018 Microchip Technology Inc.
DS50002727A-page 13
Chapter 5.
Jumper Options
The CEC1x02 Development Board has several jumpers, summarized as follows:
Jumper
Description
Details
J1
KeyPad Header
Connect to an external keypad up to 4x4
J2
JTAG Header
Standard 20 pin ARM®-JTAG Connec-
tor.
J3
JTAG Header
1x6 JTAG Connector.
J5
Voltage Reference Input Select
Selects the positive voltage input to the
VREF_ADC pin. Shorting the pin 1-2 to
“VREF” will provide a Vdd/3.3V refer-
ence. Shorting the center pin 3-4 to
“VPP” will provide a reference voltage of
~1.59 V; this voltage is required by the
CEC1702’s EFUSE programming
sequence. See the "CEC1702 Data
Sheet EFUSE" chapter for additional
information.
J6, J7, J8, J9, J10, J11
GPIO Expansion Header
Connect to CEC1702 GPIO pins.
J12
LCD Backlight Power
Connect to LCD display power cable.
J13
MCP2221A I2C Header
Connect to external I2C device(s) to the
MCP2221A.
JP1
MB_5V, VCC_5V Select
Selects between MB_5V or VCC_5V
JP2
GPIO171/UART_RX Select
Selects between MikroBUS™
UART_RX and USB-UART device
UART_RX
X1
I2C Expansion Header
Connect to external I2C device(s).
X2
ADC Header Pull-up
Enables a 3.3 V pull-up for the Ana-
log-to-Digital Converter expansion
header.
X3
ADC Header
Connect to an external ADC device.
X5
VIN Connection
Can be used for total system power con-
sumption measurement when using
external power supply.
X6
BATT 9V
Optional header to support 9V battery
for portable environment where need.
X7
3.3V Current Sense
Provides a test point to measure the
power consumption on the 3.3 V rail.
Removing this jumper will also
hard-reset the board.
X8, X9
MCP2221A I2C signals pull-high
Pull-up the MCP2221A I2C signals.