W78958B Datasheet, PDF (18/28 Pages) Winbond – 8-BIT EMULATION MICROCONTROLLER

W78958B
DC Characteristics, continued
PARAMETER
SYM.
TEST CONDITIONS
O/P High Voltage
O/P Low Voltage
O/P High Voltage
Input Voltage
Input Voltage
Input Voltage
Input Voltage
Input Voltage
Input Voltage
VOH2
VOL3
VOH3
VILT
VIHT
VILC
VIHC
VILR
VIHR
IOH2 = -400 µA
Note 3
(ALE, PSEN , P0, DP4, EMU)
IOL2 = 2 mA
(AP5, AP6, AP7, ESEL , CLKS1)
IOH2 = -100 µA
(AP5, AP6, AP7, ESEL , CLKS1)
VDD = 5V ±10%
VDD = 5V ±10%
VDD = 5V ±10%, XTAL1 Note 5
VDD = 5V ±10%, XTAL1 Note 5
VDD = 5V ±10%, RESET Note 5
VDD = 5V ±10%, RESET Note 5
MIN.
2.4
SPEC.
TYP. MAX.
-
-
UNIT
V
-
-
0.45 V
2.4
-
-
V
0
-
0.8
V
2.4
-
Note 4
V
0
-
0.8
V
3.5
-
Note 4
V
0
-
0.8
V
2.4
-
Note 4
V
Notes:
1. 0 < VIN < VDD, for ENSTD , INT 2 , INT 3 , RESET, EA , ICESET, Port 0, DP4, P1, P2, P3, and P8 inputs in leakage.
2. Using an internal pull low/high resistor (approx. 30K).
3. ALE, PSEN , P0 and DP4 in external program or data access mode.
4. The maximum input voltage is VDD +0.2V.
5. XTAL1 is a CMOS input and RESET is a Schmitt trigger input.
AC CHARACTERISTICS
AC specifications are a function of the particular process used to manufacture the product, the ratings
of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the specifications
can be expressed in terms of multiple input clock periods (TCP), and actual parts will usually
experience less than a ±20 nS variation. The figures below represent the performance expected from
a 0.8 micron CMOS process.
Refer to the W78C52 data sheet for further AC specifications.
Clock Input Waveform
PARAMETR
SYMBOL
MIN.
Operating Speed
FOP
0
Clock Period
TCP
25
Clock High
TCH
10
Clock Low
TCL
10
Notes:
1. The clock may be stopped indefinitely in either state.
2. The TCP specification is used as a reference in other specifications.
3. There are no duty cycle requirements on the XTAL1 input.
TYP.
-
-
-
-
MAX.
40
-
-
-
UNITS
MHz
nS
nS
nS
NOTES
1
2
3
3
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