Motorola MC6805R Series Advance Information page 59

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1.0 V (Programming Mode)
Summary of Programming Steps:
1. When plugging in the MC68705R3, MC68705U3, MC68705R5, or MC68705U5 or the MCM2532 be sure that Sl and S2 are closed
and that V CC and + 26 V are not applied.
2. To initiate programming, be sure Sl is closed, S2 is closed and VCC and + 25 V are applied. Then open S2, followed by Sl.
3. Before removing the MC68705R3, MC68705U3, MC68705R5, or MC68705U5, first close S2 and then close Sl. Disconnect Vce and
+ 26 V then remove the MC68705R3, MC68705U3, MC68705R5, or MC68705U5.
Figure 9-1. Programming Connections Schematic Diagram
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