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
Open
1
J3
2-circuit terminal block
1
J2
40-pin right-angle male connector
1
J1
1N4001 diode
1
D1
0.1μF capacitors
5
C10–C14
Reference designator, not used
0
C9
0.01μF capacitor
1
C8
22pF capacitors
2
C6, C7
22μF, 25V radial-lead electrolytic
capacitors
2
C4, C5
1μF ceramic capacitors
3
C1, C2, C3
DESCRIPTION
QTY
DESIGNATION
10M
, 5% resistor
1
R1
Light-emitting diode
1
LED1
Open
0
L2
Open
0
L1
Open
0
JU5
Open
0
JU4
Open
0
JU3
Reference designator, not used
0
JU2
Open
0
JU1
0
J4
Rubber feet
28-pin socket for U3
4
1
None
None
32.768kHz watch crystal
1
Y1
Maxim MAX707CPA
1
U7
74HCT245 bidirectional buffer
1
U6
62256 (32K x 8) static RAM
1
U5
7805 regulator, TO-220 size
1
U4
27C256 EPROM containing
monitor program
1
U3
Maxim MAX233CPP
1
U2
68HC16 μC
MC68HC16Z1CFC16 (132-pin
plastic quad flat pack)
1
U1
330k
, 5% resistor
10k
, 5% resistors
470
, 5% resistor
10k
SIP resistor
1
2
1
1
R2
DESCRIPTION
QTY
DESIGNATION
Heatsink for U4, thermalloy # 6078
1
None
3" x 5" printed circuit board
1
None
20-pin socket for U6
1
None
R3, R4
R5
R6
_____________________________________________68HC16 Module Component List
Slide switch
Momentary pushbutton switch
1
1
SW1
SW2
6
68HC16 Module
________________________________________________________________ Maxim Integrated Products
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.
1
19-1322; Rev 0; 12/97