Specifications
11
JP7 is the 68HC11 8-bit A/D analog input port. Input voltages between 0 and 5volts can be applied to
the A/D. Grounds are provided for each analog input.
Pin
Function Pin Function
1 AN0 2 ground
3 AN1 3 ground
4 AN2 5 ground
6 AN3 6 ground
7 AN4 8 ground
9 AN5 10 ground
11 AN6 12 ground
13 AN7 14 ground
JP8 is PORT A on the 68HC11. This is an 8-bit digital input/output port. Reading the "M68HC11
Reference Manual", by Motorola will give information on how to utilize this port. In Interactive C, some
of these pins are pre-assigned. By editing the library routines, you can change the pre-assigned
functions.
Pin
Function Pin Function
1 PA0 2 ground
3 PA1 4 ground
5 PA2 6 ground
7 PA3 8 ground
9 PA4 10 ground
11 PA5 12 ground
13 PA6 14 ground
15 PA7 16 ground
JP9 is the expansion bus. It is setup so you can easily enhance the Finger Board with additional
circuits. You can have up to 32 memory mapped digital inputs and 32 digital outputs. Circuit diagrams
are available at our Web page on how to utilize this header. Data lines are brought out as well as
power and ground pins. Hexadecimal address map is shown. W is for write; R is for read.
CPU address lines A0 and A1 are available for memory mapped LCD's or other peripheral devices.
Pin
Function Pin Function
1 4000W 2 D0
3 4000R 4 D1
5 5000W 6 D2
7 5000R 8 D3
9 6000W 10 D4
11 6000R 12 D5
13 7000W 14 D6
15 7000R 16 D7
17 A0 18 A1
19 VCC 20 ground