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ModCon Connector Details


The column on the right is for writing in the pin functions for a particular application. Note that some of the pins may be in use such as all port B and port C pins for the on-board 32K memory socket.

HC11
Pin #
ModCon
Connections
HC11
Port
Alternate
Function
Input or
Output
Use                      
Port A: timer functions and general purpose I/O
34B28PA0IC3in 
33B27PA1IC2in 
32B30PA2IC1in 
31B29, J7-1PA3OC5/IC4/OC1in/out 
30A30, J6-1PA4OC4out 
29A29, J5-1PA5OC3out 
28A28, J4-1PA6OC2out 
27A27PA7PAIin/out 
 
Port B: MSB address lines and general purpose outputs.
Note: These pins are used by the 32K memory socket and
are not available for general purpose I/O if the 32K memory is used
42B20PB0ADDR8out 
41B19PB1ADDR9out 
40B22PB2ADDR10out 
39B21PB3ADDR11out 
38B24PB4ADDR12out 
37B23PB5ADDR13out 
36B26PB6ADDR14out 
35B25PB7ADDR15out 
 
Port C: multiplexed address/data lines and general purpose I/O.
Note: These pins are used by the 32K memory socket and
are not available for general purpose I/O if the 32K memory is used
9 A9 PC0D0/A0in/out 
10A10PC1D1/A1in/out 
11A11PC2D2/A2in/out 
12A12PC3D3/A3in/out 
13A13PC4D4/A4in/out 
14A14PC5D5/A5in/out 
15A15PC6D6/A6in/out 
16A16PC7D7/A7in/out 
 
Port D: communications and general purpose I/O
20A20, J2-1PD0SCI RxDin/out 
21A21, J2-2PD1SCI TxDin/out 
22A22, J3-10PD2MISOin/out 
23A23, J3-8PD3MOSIin/out 
24A24, J3-6PD4SCKin/out 
25A25, J3-4PD5/SSin/out 
 
Port E: analog inputs and general purpose inputs
43B17PE0AN0in 
45B15PE1AN1in 
47B13PE2AN2in 
49B11PE3AN3in 
44B18PE4AN4in 
46B16PE5AN5in 
48B14PE6AN6in 
50B12PE7AN7in 



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