Z86E0412PSC1860 ZILOG [Zilog, Inc.], Z86E0412PSC1860 Datasheet - Page 19

• Manufacturer Part Number: Z86E0412PSC1860
• Description: Z8 CMOS OTP Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

PS009201-0301
Table 8. EPROM ARRAY READ Mode Conditions (Continued)
EPROM ARRAY PROGRAM AND VERIFY Mode Operation
1. Perform the EPROM ARRAY READ/WRITE mode entry (see the
2. Reset the address counter by pulsing the CLEAR pin. See Figure 10 and
3. The address counter is incremented on the rising edge of the CLOCK signal.
4. After resetting the address counter using the CLEAR pin, the address counter
5. The PROGRAM operation is performed by lowering PGM to V
6. The PROGRAM operation is complete when PGM is raised back to V
7. The VERIFY operation is performed by lowering OE to V
8. A V
9. Please refer to
10. If the data read shows that the address location is not yet programmed, then
11. If the address location is not programmed after the 25th try, then the device is
12. If the address location is programmed, then the address location is
13. The next address is accessed by pulsing the CLOCK High to V
CLEAR
CLOCK
PGM
ARRAY READ/WRITE Mode Entry
to Step 2.
Table 9. Please refer to
CLOCK signal.
points to address 0000h.
Figure 10. Please refer to
PGM signal.
data on Port2. Pins P20 to P27 represent the EPROM data D0 to D7,
respectively.
corresponds to a 0 level stored in the EPROM array.
EPROM Read mode and data access time.
repeat Steps 5 to 7 until the data read shows that the address location is
programmed.
considered failed.
overprogrammed with three times the total accumulated program time.
V
IL
.
OH
-level READ on Port2 corresponds to a 1 state, while a V
Table 14
Pin 11
Pin 12
Pin 13
P r o g r a m m i n g S p e c i f i c a t i o n
Table 14
for the minimum and maximum width of OE during
Table 14
for minimum and maximum widths of the
operation on page 10) before proceeding
for minimum and maximum widths of the
Pin 12
Pin 13
Pin 14
Z8 CMOS OTP Microcontrollers
Z86E02/E04/E08/E09 SL1995
IL
See Figure 9
See Figure 9
V
and reading the
IH
IL
IH
OL
. See
, then Low to
EPROM
level
IH
.
14