Z8E001 Datasheet, PDF(45/49 Page) Zilog, Inc.

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Z8E001 Datasheet, PDF (45/49 Pages) Zilog, Inc. – CMOS OTP Microcontroller

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Zilog

INPUT PROTECTION

All I/O pins on the Z8E001 have diode input protection.

There is a diode from the I/O pad to VCC and to VSS. See

Figure 41.

Z8E001

CMOS OTP Microcontroller

However, on the Z8E001, the /RESET pin has only the in-

put protection diode from pad to VSS. See Figure 42.

VCC

/RESET

VSS

Figure 41. I/O Pin Diode Input Protection

VSS

Figure 42. /RESET Pin Input Protection

The high-side input protection diode was removed on this

pin to allow the application of high voltage during the OTP

programming mode.

For better noise immunity in applications that are exposed

to system EMI, a clamping diode to VCC from this pin may

be required to prevent entering the OTP programming

mode or to prevent high voltage from damaging this pin.

DS97Z8X1300

PRELIMINARY

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