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DA852x-UG02-608 Page 6 of 47
User Guide Release 2.0
DA852X E Ink Evaluation Kit
Display Controllers
JP2
Removing this disables the digital I/O signals from the level shifter to the DA852X. This allows direct access and
control of the chip from an external controller via the expansion input pins
JP3
Removal of this disables the Chip Select signal to the DA852X device. This would only be done if using the
external Flex connection.
JP5
Removal of this disables the StandbyB signal to the DA852X device. This would be done if the device is using
an external 15v supply, or is being operated as a slave cascaded device.
JP4
Selects the 15volt supply either from the internal charge pump, or from the EXT_V15 pin.
The normal positions of the jumpers are as shown below in red:
Figure 2.
Normal Position of Jumpers
2.1.4
Expansion Input
This series of test points can be used to
•
Monitor the control signals from the USB interface
•
Transmit the signals to external hardware (e.g. the DA852X device mounted onto a flexible PCB).
•
Allow an external microcontroller to provide the control signals to the DA852X device. (Remove JP2)
•
Accept the signals from the Expansion Output port of another DA852X board. (Remove JP2)
•
Note that CSN1 is
Active High
, labelling on the PCB is incorrect
2.1.5
Expansion Output
This series of test points can be used to
•
Monitor the control signals from the USB interface
•
Send the control signals to the Expansion Input port of another DA852X board.
•
Note that CSN is an
Active High
output, labelling on the PCB is incorrect.
Note that the signals DATAOUT and CLKOUT are different from the Expansion Input port. These are passed from the
DATAOUT and CLKOUT pins of the DA852X device and allow cascade connection of devices
The 3V3_OUT power supply is intended to supply the USB interface components of the second board, which will not be
plugged into the USB port.
