Z8615 Просмотр технического описания (PDF) - Zilog

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Z8615

NMOS Z8®8-BIT MCU KEYBOARDCONTROLLER

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TOLERANCE VALUES

Z8615

CPS DC-4143-05

The Z8615 provides internal pull-up resistors. Tolerances

for these resistors consists of the following:

Resistor

2.4K

10.4K

Tolerance

± 25%

± 35%

The RC Oscillator option provided on the Z8615 requires an

external 1% precision resistor. Tolerance for the oscillator

consists of the following:

Frequency:

Tolerance:

4 MHz to 5 MHz

+ 10%, – 10%

Note:

1) All Characteristics stated above are specified

according to the following:

VCC = 4.75 to 5.25

Temperature = 15°C to 55°C

2) To measure the RC oscillator's frequency, use only a high-

impedance probe (10 Mohms, 2 pf) to probe XTAL2 (Pin 2). Other

probes with higher capacitance loading can create strong ground

bounces which shift the frequency reading at XTAL2. Also, do not

probe XTAL1 when measuring the RC frequency. Refer to the

procedure for Test Conditions and Methodology.

3) To measure the POR delay, apply a square wave (amplitude = 4

volts, frequency ~ .5 Hertz) to RESET (Pin 6) then measure the time it

takes for Data Strobe (Pin 8) to go high after RESET goes high. Refer

to the procedure for Test Conditions and Methodology.

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