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ModCon Technical Details



The ModCon PCB contains everything to build professional microcontroller applications. Shown in the photo above:

Reset Circuit - The reset button is shown at the top left. Just to the right of the crystal near the reset button is where the reset circuit is located. Both of the popular reset chips, the MC34064 and DS1233 are supported.

The Bus A and Bus B connectors provide nearly all HC11 pins on a stackable bus structure. The pin arrangement is compatible with the EVBU development systems by making a split adapter cable. Extra pins are provided for end user applications.

The SCI connector is used for RS-232 communication (via our RS-232 kit, included with our package deals). This connector is also used for MIDI communications through our MIDI Gizmo product.

The ModCon's 14-pin SPI connector allows for additional expansion by including extra control lines to make interfacing easier. Included on this connector are Reset, XIRQ, IRQ, OC4 and OC5 as well as two spare connections.

The ModCon includes four servo motor connections. As shipped, the ModCon is configured for use with Airtronics type servo connectors. The Futaba standard is also supported with a simple modification.

The ModCon's first two configuration switches control the HC11's operation mode (normal/special and single/multi-chip). The two switches on the right control XIRQ and PE0, supporting the Buffalo Monitor or other functions.

Either our 32K RAM or user EPROM chips can be used with the ModCon.

The power connector's center two pins supply power to the ModCon. By cutting a bow tie, pin 3 becomes RAM power, while pin 2 supplies power to the rest of the ModCon. This makes use with battery supplies for the RAM easier.


Documentation

All our board level products include a printed assembly & reference guide.

Documentation on the Buffalo monitor is provided with your order.

Motorola provides the following manuals for the HC11 processor provided.


Specifications

Weight, ModCon Full1.8oz
Weight, RS-232 Adapter1.9oz
Size, ModCon3" x 2.5"
Power Consumption, ModCon Full Kit32mA @ 5V
Power Consumption, RS-232 Adapter8mA @ 5V
Memory, HC11 on chipROM: 12K, EEPROM:512 bytes, RAM: 512 bytes, ModCon socket: 32K (ROM, RAM or EEPROM)
OnChip peripheralsRS-232,Counters, Timers, pulse accumulator, SPI, parallel I/O, analog input
Processor speed8MHz crystal, 2MHz internal E-clock


Connector Pin Descriptions

For a convenient page detailing all the I/O lines on the ModCon click here. Save the page and edit it for your project so you know what each line is used for.

ModCon BusA Connector

Description Pin Pin Description
GND 1 2 MODB/VSTBY
MODA/LIR 3 4 STRA/AS
E 5 6 STRB/R/W
N/C 7 8 N/C
PC0/AD0 9 10 PC1/AD1
PC2/AD2 11 12 PC3/AD3
PC4/AD4 13 14 PC5/AD5
PC6/AD6 15 16 PC7/AD7
RESET 17 18 XIRQ
IRQ 19 20 PD0/RxD
PD1/TxD 21 22 PD2/MISO
PD3/MOSI 23 24 PD4/SCK
PD5/SS 25 26 NC
PA7/OC1 27 28 PA6/OC2
PA5/OC3 29 30 PA4/OC4
Y0 31 32 Y1
+5 33 34 +5

 

ModCon BusB Connector

Description Pin Pin Description
GND 1 2 GND
VCC 3 4 VCC
Spare 5 6 Spare
Spare 7 8 Spare
VRL 9 10 VRH
PE3 11 12 PE7
PE2 13 14 PE6
PE1 15 16 PE5
PE0 17 18 PE4
PB1/A9 19 20 PB0/A8
PB3/A11 21 22 PB2/A10
PB5/A13 23 24 PB4/A12
PB7/A15 25 26 PB6/A14
PA1/IC2 27 28 PA0/IC3
PA3/OC5 29 30 PA2/IC1
Y2 31 32 Y3
MEM PWR 33 34 MEM PWR

 

ModCon 14-pin SPI Connector

Description Pin Pin Description
+5 1 2 GND
XIRQ 3 4 SS
IRQ 5 6 SCK
Reset 7 8 MOSI
N/C 9 10 MISO
OC4 11 12 OC5
N/C 13 14 N/C




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