68HC16 Module
________________General Description
The 68HC16 module is an assembled and tested print-
ed-circuit board intended for use with Maxim’s high-
speed serial-interface evaluation kits (EV kits). The
module uses an inexpensive 8-bit implementation of
Motorola’s MC68HC16Z1 microcontroller (µC) to collect
data samples at high speed using the QSPI™ interface.
It requires an IBM-compatible personal computer and
an external DC power supply, typically 12V DC or as
specified in EV kit manual.
Maxim’s 68HC16 module is provided to allow customers
to evaluate selected Maxim products. It is not intended
to be used as a microprocessor development platform,
and such use is not supported by Maxim.
QSPI is a trademark of Motorola Corp.
68HC16 Module
________________Detailed Description
Power Input Connector J2
The 68HC16 module draws its power from a user-sup-
plied power source connected to terminal block J2. Be
sure to note the positive and negative markings on the
board. A three-terminal 5V regulator allows input voltages
between 8V and an absolute maximum of 20V. The
68HC16 module typically requires 200mA of input current.
68HC16 Microcontroller
U1 is Motorola’s 68HC16Z1 µC. Contact Motorola for µC
information, development, and support. Maxim EV kits use
the high-speed queued serial peripheral interface (QSPI)
and the internal chip-select generation.
A MAX707 on the module monitors the 5V logic supply,
generates the power-on reset, and produces a reset
pulse whenever the reset button is pressed.
Right-angle printed circuit board
mount, DB9 female socket
1J3
2-circuit terminal block1J2
40-pin right-angle male connector1J1
1N4001 diode1D1
0.1µF capacitors5C10–C14
Reference designator, not used0C9
0.01µF capacitor1C8
22pF capacitors2C6, C7
22µF, 25V radial-lead electrolytic
capacitors
2C4, C5
1µF ceramic capacitors3C1, C2, C3
DESCRIPTIONQTYDESIGNATION
10MΩ, 5% resistor1R1
Light-emitting diode1LED1
Open0L2
Open0L1
Open0JU5
Open0JU4
Open0JU3
Reference designator, not used0JU2
Open0JU1
Open0J4
Rubber feet4None
32.768kHz watch crystal1Y1
Maxim MAX707CPA1U7
74HCT245 bidirectional buffer1U6
62256 (32K x 8) static RAM1U5
7805 regulator, TO-220 size1U4
27C256 EPROM containing
monitor program
1U3
Maxim MAX233CPP1U2
68HC16 µC
MC68HC16Z1CFC16 (132-pin
plastic quad flat pack)
1U1
330kΩ, 5% resistor1R2
DESCRIPTIONQTYDESIGNATION
Heatsink for U4, thermalloy # 60781None
3" x 5" printed circuit board1None
20-pin socket for U61None
28-pin socket for U31None
10kΩ, 5% resistors2R3, R4
_____________________________________________68HC16 Module Component List
Slide switch1SW1
Momentary pushbutton switch1SW2
470Ω, 5% resistor1R5
10kΩ SIP resistor1R6
68HC16 Module
68HC16 Module
________________________________________________________________ Maxim Integrated Products 1
19-1322; Rev 0; 12/97
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.