ZK-HC08LX-A User's Manual
Page 2
ZIF socket for the microcontroller;
A connector area to access the I/O pins of the microcontroller
for expansion prototyping;
Two clock sources: a 8 MHz clock module and a 32.768 KHz
crystal, selectable via the “OSC SEL” jumper;
A jumper (“CGMXFC SEL”) allowing either the provided RC
loop filter (needed for the microcontroller’s internal PLL) or a
user-made RC loop filter to be enabled;
A connector (J105) with RST_IN# and RST_OUT# signals.
2. A “POWER SUPPLY” section which accepts a 12 V DC, thanks to
the built-in switching power supply, provides a regulated VDD
voltage for the rest of the board. A jumper (“VDD SEL”) allows two
different microcontroller VDD voltages (3.3 V or 5.0 V) to be
selected. A circuitry (driven by the “MON08 CONNECTORS” and
“USB TO MON08 INTERFACE” sections of the board) is present
which allows the automatic power on and off of the board for
entering the “monitor mode”. An additional linear power supply
regulator provides the 5.0 V voltage required by the “USB TO
MON08 INTERFACE” section.
3. A built-in “USB TO MON08 INTERFACE” section which allows the
host PC to communicate with the microcontroller through a standard
USB interface. USB 2.0 is fully supported. When using an external
in-circuit debugger (via the “MON08” or “EMON08” connectors),
the “USB TO MON08 INTERFACE” circuitry must be bypassed by
removing all of the “ENA” jumpers in this area.
4. Two connectors for external in-circuit debugging/programming. Even
though the Starter Kits feature a built-in USB to MON08 interface,
two additional, separate MON08 connectors are present which allow
an external in-circuit debugger to be used. The “EMON08”
(Enhanced MON08) connector is used by in-circuit debugging tools
such the Freescale ICS system or the SofTec Microsystems
inDART-HC08; other tools, instead, use the “MON08” connector.
If you use an external in-circuit debugger/programmer, an additional
“VDD CTRL” connector allows you to control the Starter Kit’s VDD
voltage using the external tool’s power control. The output
impedance (both low and high) of the external tool driving the “VDD
CTRL” connector’s VDD_CTRL signal is not important.
5. A “RESET” section containing the push-button connected to the
MCU’s reset pin through a basic RC network.
6. An “INPUTS” section containing:
Four push-buttons, together with jumpers to connect/disconnect
them to/from the microcontroller’s PTA[4..1] lines;
Eight general-purpose DIP-switches, together with jumpers to
connect/disconnect them to/from the microcontroller’s PTD[7..0]
lines;
A potentiometer, together with a jumper to connect/disconnect it
to/from the microcontroller’s PTA5/ADC1 pin.
7. An “OUTPUTS” section containing:
An 8-digit, 14-segment Liquid Crystal Display (LCD).
