68HC16 Module. 68HC16 Datasheet

68HC16 Module. Datasheet pdf. Equivalent

Part 68HC16
Description 68HC16 Module
Feature www.DataSheet4U.com 19-1322; Rev 0; 12/97 68HC16 Module __________________________________________.
Manufacture Maxim Integrated Products
Datasheet
Download 68HC16 Datasheet

www.DataSheet4U.com 19-1322; Rev 0; 12/97 68HC16 Module __ 68HC16 Datasheet
Recommendation Recommendation Datasheet 68HC16 Datasheet





68HC16
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19-1322; Rev 0; 12/97
68HC16 Module
_____________________________________________68HC16 Module Component List
DESIGNATION
C1, C2, C3
C4, C5
C6, C7
C8
C9
C10–C14
D1
J1
J2
J3
J4
JU1
JU2
JU3
JU4
JU5
L1
L2
LED1
R1
QTY
3
2
2
1
0
5
1
1
1
1
0
0
0
0
0
0
0
0
1
1
DESCRIPTION
DESIGNATION
1µF ceramic capacitors
22µF, 25V radial-lead electrolytic
capacitors
R2
R3, R4
R5
22pF capacitors
R6
0.01µF capacitor
SW1
Reference designator, not used
SW2
0.1µF capacitors
1N4001 diode
U1
40-pin right-angle male connector
2-circuit terminal block
U2
Right-angle printed circuit board
mount, DB9 female socket
U3
Open
U4
Open
U5
Reference designator, not used
U6
Open
U7
Open
Y1
Open
None
Open
None
Open
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Light-emitting diode
None
10M, 5% resistor
None
QTY
1
2
1
1
1
1
1
1
1
1
1
1
1
1
4
1
1
1
1
DESCRIPTION
330k, 5% resistor
10k, 5% resistors
470, 5% resistor
10kSIP resistor
Slide switch
Momentary pushbutton switch
68HC16 µC
MC68HC16Z1CFC16 (132-pin
plastic quad flat pack)
Maxim MAX233CPP
27C256 EPROM containing
monitor program
7805 regulator, TO-220 size
62256 (32K x 8) static RAM
74HCT245 bidirectional buffer
Maxim MAX707CPA
32.768kHz watch crystal
Rubber feet
28-pin socket for U3
20-pin socket for U6
3" x 5" printed circuit board
Heatsink for U4, thermalloy # 6078
DataShee
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.
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________________________________________________________________ Maxim Integrated Products 1
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.
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68HC16
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68HC16 Module
The 68HC16 uses a phase-locked loop (PLL) to set its
bus speed. Crystal Y1 is a 32.768kHz frequency refer-
ence. The internal oscillator runs 256 times faster than the
external crystal. When the 68HC16 is reset, it waits for the
PLL to lock before it executes any software. After the PLL
locks onto the reference frequency, the software doubles
the clock speed by writing to the clock synthesizer con-
trol register, selecting a bus speed of 16.78MHz.
U5, the user RAM area, is a 32kbyte CMOS static RAM.
The 74HCT245 octal buffer lets the 68HC16 module
access an 8-bit port on the 40-pin interface connector.
This memory-mapped port consists of separate read
and write strobes, four chip selects, four address LSBs,
and eight data bits.
Table 1. Serial Communications Port J3
PIN NAME
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 None
FUNCTION
Handshake; hard-wired to DTR and DSR
RS-232-compatible data output from
68HC16 module
RS-232-compatible data input to
68HC16 module
Handshake; hard-wired to DCD and DSR
Signal ground connection
Handshake; hard-wired to DCD and DTR
Handshake; hard-wired to CTS
Handshake; hard-wired to RTS
Unused
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Serial Communications
J3 is an RS-232 serial port, designed to be compatible Table 2. 40-Pin Data-Connector Signals
with the IBM PC 9-pin serial port. Use a straight-
through DB9 male-to-female cable to connect J3 to this
PIN
port. If the only available serial port has a 25-pin con-
1–4
nector, you may use a standard 25-pin to 9-pin
5, 6
adapter. Table 1 shows the pinout of J3.
7, 8
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The MAX233 is an RS-232 interface voltage level shifter
10
with two transmitters and two receivers. It includes a
11
built-in charge pump with internal capacitors that gener-
12
ates the output voltages necessary to drive RS-232 lines.
13
NAME
GND
VPREREG
VCC
RD
WR
7E000
7E800
7F000
FUNCTION
Ground
Unregulated input voltage
+5V from on-board regulator
Read strobe
Write strobe
Chip select for 7E000–7E7FF
Chip select for 7E800–7EFFF
Chip select for 7F000–7F7FF
40-Pin Data Connector J1
The 20 x 2 pin header connects the 68HC16 module to
a Maxim EV kit. Table 2 lists the function of each pin.
Note that 68HC16 object code is not compatible with
68HC11 object code. Use the 68HC16 module only
with those modules that are designed to support it, and
only download code that is targeted for the 68HC16
module. Downloading incorrect object code into the
68HC16 module will have unpredictable results.
14
15
16
17
18
19
20–26
27
28
29
7F800
A00
A01
A02
A03
EXTD0
EXTD1–7
IC1
IC2
IC3
Chip select for 7F800–7FFFF
Address bit 0 (LSB)
Address bit 1
Address bit 2
Address bit 3
Buffered data bus 0 (LSB)
Buffered data bus bits 1–7
General I/O port bit 0 (LSB)
General I/O port bit 1
General I/O port bit 2
Address Ranges
30
OC1
General I/O port bit 3
The 68HC16 µC generates various enable signals for dif-
31
OC2
General I/O port bit 4
ferent address ranges. The ROM and RAM enable sig-
32
OC3
General I/O port bit 5
nals are fed directly to the respective chips. Several
33
OC4
General I/O port bit 6
additional signals (J1.11–J1.14) are available on the data 34 IC4 General I/O port bit 7
connector to be used by Maxim EV kits. Table 3 outlines
35
MISO
QSPI master-in, slave-out
the address ranges for each of the elements found on
36
MOSI
QSPI master-out, slave-in
the 68HC16 module, and Table 4 is a truth table that
37
SCK
QSPI serial clock
describes the logic for each of the 68HC16’s chip-select
38 PCS0/SS QSPI chip-select output
outputs. Because the addresses are not completely
decoded, the boot ROM and user RAM have shadows.
39 CLKOUT System clock output
40
PWMA
Pulse-width-modulator output
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