z86e02sl1925 ZiLOG Semiconductor, z86e02sl1925 Datasheet - Page 28

• Manufacturer Part Number: z86e02sl1925
• Description: General-purpose Otp Mcu With 14 I/o Lines
• Manufacturer: ZiLOG Semiconductor

Pin Functions
PS014802-0903
EPROM Mode
Pin Function Changes in EPROM Mode
Application Precaution
D7–D0 Data Bus. Data can be read from, or written to, the EPROM through this
data bus.
V
6.4V during other modes (PROGRAM, PROGRAM VERIFY, etc.).
CE Chip Enable (active Low). This pin is active during EPROM READ mode,
PROGRAM mode, and PROGRAM VERIFY mode.
OE Output Enable (active Low). This pin drives the Data Bus direction. When
this pin is Low, the data bus is output. When High, the data bus is input.This pin
must toggle for each data output read.
EPM EPROM Program Mode. This pin controls the selection of EPROM opera-
tion modes by applying different voltages.
V
Clear (active High). This pin resets the internal address counter at the High level.
Clock Address Clock. This pin is a clock input. The internal address counter
increases by one count with one clock cycle.
PGM Program Mode (active Low). A Low level at this pin programs the data to
the EPROM through the data bus.
With the exception of V
EPROM mode. X
OE, P32 functions as EPM, P33 functions as V
functions as CLOCK, and P02 functions as PGM. Please refer to Program Mem-
ory for additional EPROM mode descriptions.
The production test-mode environment may be enabled accidentally during nor-
mal operation if excessive noise surges above V
In addition, processor operation of Z8
noise surges on the P33 (V
microcontroller is in Standard Mode.
CC
PP
Power Supply. It is typically 5V during all EPROM Read Mode and typically
Program Voltage. This pin supplies the program voltage.
OUT
offers no function; X
CC
and GND, the Z8
PP
), XTAL1 (CE), P32 (EPM), P31 (OE) pins while the
General-Purpose OTP MCU with 14 I/O Lines
®
OTP devices maybe affected by excessive
IN
®
functions as CE, P31 functions as
changes all of its pin functions in
PP
CC
P00 functions as CLEAR, P01
occur on the XTAL1 pin (OE).
Z86E02 SL 1925
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