Z86E09 Datasheet, PDF (22/38 Pages) Zilog, Inc. – Z8 CMOS OTP Microcontrollers

Z86E02/E04/E08/E09 SL1995
Z8 CMOS OTP Microcontrollers
17
6. After a delay of at least 1µs minimum from V_PP rising, OE is raised to V_IH.
7. The CLOCK is raised to V_IH.
8. OE is pulsed Low to V_IL, then High to V_IH.
9. The CLOCK is lowered to V_IL.
10. Repeat steps 7 to 9 six more times.
11. After a delay of at least 1µs minimum, EPM is raised to V_IH.
12. The device is now in OPTION BIT READ/WRITE mode. See Figure 11.
Figure 11. OPTION BIT PROGRAM AND VERIFY Mode Entry 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 ^VIH
V _IL
OE
V_IH
V _IL
PGM
V_IH
V _IL
Data
(Port 2)
X_OUT
Not connected
Not connected
Table 11. OPTION BIT PROGRAM AND VERIFY Mode Entry Conditions
EPROM Signal
D0–D3
D4–D7
GND
V_CC
18-Pin DIP/SOIC
Pins 15, 16, 17, 18
Pins 1, 2, 3, 4
Pin 14
Pin 5
20-Pin SSOP
Pins 17, 18, 19, 20
Pins 1, 2, 3, 4
Pins 15, 16
Pins 5, 6
Forced State
NC
NC
GND
5V
PS009201-0301
Programming Specification