Z86E09 Datasheet, PDF (11/38 Pages) Zilog, Inc. – Z8 CMOS OTP Microcontrollers

Z86E02/E04/E08/E09 SL1995
Z8 CMOS OTP Microcontrollers
6
8. Apply one clock pulse to X_IN.
9. Force the Port 2 pins with F0h.
10. Apply one clock pulse to X_IN.
11. Force the Port 2 pins with 0Fh.
12. Apply one clock pulse to X_IN.
13. Force the Port 2 pins with 00h.
14. Apply one clock pulse to X_IN.
15. Force the Port 2 pins with F1h.
16. Apply one clock pulse to X_IN.
17. Force the Port 2 pins with 00h.
18. Apply one clock pulse to X_IN.
19. The part is now in EPROM mode. The only way to exit EPROM mode is to
perform a POR.
Note: All signals must be stable before the X_IN (CE) pin is pulsed High and can-
not change until X_IN (CE) pin is in a V_IL state. The signal should be stable
for a minimum of 1µsec.
PS009201-0301
Programming Specification