8XC196MC, MD, MH USER’S MANUAL

From Auto or Slave

Programming

Start PPW Timer

Write Data to

OTPROM

Enable Interrupts

Enter Idle Mode

Wait for PPW Timer Interrupt

No Required

Writes Done

?

Yes

Compare Programmed

Locations and Set Flags

Return

A0190-03

Figure 16-3. Modified Quick-pulse Algorithm

Auto programming repeats the pulse twice (for the 87C196MC, MD) or five times (for the 87C196MH), using the pulse width you specify in the external EPROM. Slave mode repeats the pulse until PROG# is deasserted. In slave programming mode, the PALE# signal controls the pulse width. In all cases, the pulse width must be at least 100 µs for successful pr ogramming.

16-10

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Intel 8XC196MD, 8XC196MH, 8XC196MC manual Modified Quick-pulse Algorithm