Renesas Single-Chip Microcomputer M306NKT3 - Manual (Page 136)

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Figure 13-2 E8Direct enumeration
13.2 Hardware Differences
The FDM had no capability of supplying the target power whereas the E8Direct can supply 3.3V or 5V and the
FDM-E8Direct pin usage is different. This means that it is not possible to simply swap an FDM for an E8. The
general purpose I/O pins on the FDM were labelled as MD0 to MD4 and FWE, and they had a direct mapping
with the mode pins with matching names on the target devices. Because the number of available general purpose
I/O pins is reduced on the E8, and the locations on the 14-pin header are different, we can no longer have a
direct mapping between device mode pin names and E8 I/O pins, so we have chosen to label them as ‘A’, ‘B’,
‘C’ and ‘D’. The pin settings required for E8Direct will have to be board specific rather than device specific.