MC9S12B128_05 Datasheet, PDF (123/132 Pages) Motorola, Inc – Covers also preliminary MC9S12B64 using MC9S12B128 die

A.8 External Bus Timing
Device User Guide —9S12B128DGV1/D V01.13
A timing diagram of the external multiplexed-bus is illustrated in Figure A-11 with the actual timing
values shown on Table A-26 in 5V range. All major bus signals are included in the diagram. While both
a data write and data read cycle are shown, only one or the other would occur on a particular bus cycle.
A.8.1 General Muxed Bus Timing
The expanded bus timings are highly dependent on the load conditions. The timing parameters shown
assume a balanced load across all outputs.
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