Z86E09 Datasheet, PDF(15/38 Page) Zilog, Inc. – Z8 CMOS OTP Microcontrollers

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Z86E09 Datasheet, PDF (15/38 Pages) Zilog, Inc. – Z8 CMOS OTP Microcontrollers

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Z86E02/E04/E08/E09 SL1995

Z8 CMOS OTP Microcontrollers

EPROM Array Modes

EPROM ARRAY READ/WRITE Mode Entry

1. To enter EPROM ARRAY READ/WRITE mode, all pins must be set as per

Table 7.

2. EPM is lowered to VIL.

3. OE is lowered to VIL.

4. The VPP is raised to VIH.

5. The CLEAR is pulsed High to VIH and back down to VIL.

6. The VPP is lowered to VIL.

7. After a delay of at least 1Âµsec minimum, the VPP is raised to VIH.

8. OE is raised to VIH.

9. EPM is raised to VIH.

10. The device now operates in EPROM ARRAY READ/WRITE mode. See

Figure 8.

Note: The delay between edges should be 1Âµsec minimum unless speciï¬ed in

the timing speciï¬cation in Table 14.

PS009201-0301

Programming Specification

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