Z86C02 Datasheet, PDF (25/37 Pages) Zilog, Inc. – Two On-Board Comparators

Zilog
Z86C02/E02/L02
Cost Effective, 512-Byte ROM CMOS Z8^® Microcontrollers
Vcc
(Volts)
3.2
1
3.1
3.0
2.9
Z86E02
2.8
2.7
2.6
2.5
Z86C02
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
–40°C –20°C 0°C
20°C
Z86L02
40°C 60°C 80°C 100°C
Temp
Figure 18. Typical Auto Reset Voltage (V_LV) vs. Temperature
Options
The Z86C02/E02/L02 offers ROM protect, Low Noise,
Auto Latch Disable, RC Oscillator, and Permanent WDT
enable features as options. The Z86E02 must be power
cycled to fully implement the selected option after pro-
gramming.
Low Noise. The Z8 can operate in a low EMI emission
mode by selecting the low noise option. Use of this feature
will result in:
s All drivers slew rates are reduced to 10 ns (typical).
s Internal SCLK/TCLK = XTAL operation is limited to a
maximum of 4 MHz - 250 ns cycle time.
s Output drivers have resistances of 200 ohms (typical).
s Oscillator divide-by-two circuitry is eliminated.
ROM Protect. ROM Protect fully protects the Z8 ROM
code from being read externally. When ROM Protect is se-
lected, the instructions LDC and LDCI are supported.
(However, instructions LDE and LDEI are not supported.)
EPROM/TEST MODE Disable. When selected, this bit will
permanently disable EPROM and Factory Test mode.
Auto Latch Disable. Auto Latch Disable option when Se-
lected will globally disable all Auto Latches.
RC. RC Oscillator option when selected will allow using a
resistor (R) and a capacitor (C) as a clock source.
WDT Enable. WDT Enable option bit when selected will
have the WDT permanently enabled in all modes and can
not be stopped in HALT or STOP Mode.
EPROM Mode Description. In addition to V_DD and GND
(V_SS), the Z8 changes all its pin functions in the EPROM
mode. XTAL2 has no function, XTAL1 functions as /CE,
P31 functions as /OE, P32 functions as EPM, P33 func-
tions as V_PP, and P02 functions as /PGM.
Please note that when using the device in a noisy environ-
ment, it is suggested that the voltages on the EPM and CE
pins be clamped to V_CC through a diode to V_CC to prevent
accidentally entering the OTP mode. The V_PP requires
both a diode and a 100 pF capacitor.
User Modes. Table 6 shows the programming voltage of
each mode of Z86E02.
DS96DZ80301
PRELIMINARY
25