Z86E09 Datasheet, PDF (26/38 Pages) Zilog, Inc. – Z8 CMOS OTP Microcontrollers

Z86E02/E04/E08/E09 SL1995
Z8 CMOS OTP Microcontrollers
21
Figure 13. OPTION BIT READ Mode Functional Timing
V_CC
5V
0V
CLEAR
V_IH
V_IL
EPM
V_IH
V_IL
CE
V_IH
V_IL
V_PP
V_IH
V_IL
CLOCK
V_IH
V_IL
OE
V_IH
V_IL
PGM
V_IH
V_IL
Data
(Port 2)
X_OUT
Not connected
Invalid
Data Out
Invalid
Power-Down Procedure
The following steps outline the power-down operation of the Z86E0x device.
1. Set up the I/O pins per Figure 14 and Table 13.
2. CE is raised to V_IH.
3. EPM is lowered to GND.
4. V_PP is lowered to GND.
5. V_CC is lowered from 5.0V to 2.0V.
6. PGM is lowered to GND.
7. OE is lowered to GND.
8. CE is lowered to GND.
9. V_CC is lowered to GND.
PS009201-0301
Programming Specification