Design-In - Electrical Aspects
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COMX Communication Modules | Design Guide
DOC100901DG18EN | Revision 18 | English | 2013-12 | Released | Public
© Hilscher, 2002-2013
3.1.8.8
Integration of COMX Module into a Host System
It is possible to connect the COMX Module to an 8 or 16 Bit data bus. For the 16 Bit interface se-
lection it is necessary to connect the Word Interface Mode line DPM_SIRQn to a low level. If this
line is left open the COMX devices will work with an 8 Bit interface like the COM devices.
Figure 11: Interface with 8 Bit Data Bus - Interface with 16 Bit Interface
DPM_BHEn DPM_A0
Function
0 0 word
access
D[15:0]
0
1 (high)
high byte access D[15:8]
1
0 (low)
low byte access D[7:0]
1 1 no
access,
illegal
Table 38: Function Table of Decode Logic