AT89C51CC03U-RDTIM datasheet(171/195 Pages) ATMEL

171 / 195 page

171

AT89C51CC03

4182I–CAN–06/05

Figure 81. Clock Signal Waveform for ICC Tests in Active and Idle Modes

DC Parameters for A/D

Converter

Table 117. DC Parameters for AD Converter in Precision Conversion

Note:

1. Typicals are based on a limited number of samples and are not guaranteed.

2. For temperatures higher than 85°C, use standard conversion (8-bit only) and

PRS > 2.

3. VREF < VCC + 0.2V for temperatures higher than 85.

AC Parameters

Explanation of the AC

Symbols

Each timing symbol has 5 characters. The first character is always a “T” (stands for

time). The other characters, depending on their positions, stand for the name of a signal

or the logical status of that signal. The following is a list of all the characters and what

they stand for.

Example: TAVLL = Time for Address Valid to ALE Low.

TLLPL = Time for ALE Low to PSEN Low.

TA = -40

°C to +85°C; V

SS = 0V; VCC = 3V to 5.5V; F = 0 to 40 MHz.

(Load Capacitance for port 0, ALE and PSEN = 60 pF; Load Capacitance for all other

outputs = 60 pF.)

Table 118, Table 121 and Table 124 give the description of each AC symbols.

Table 119, Table 123 and Table 125 give for each range the AC parameter.

Table 120, Table 123 and Table 126 give the frequency derating formula of the AC

parameter for each speed range description. To calculate each AC symbols: Take the x

value and use this value in the formula.

Example: TLLIV and 20 MHz, Standard clock.

x = 30 ns

T = 50 ns

TCCIV = 4T - x = 170 ns

VCC-0.5V

0.45V

0.7VCC

0.2VCC-0.1

TCLCH

TCHCL

TCLCH = TCHCL = 5ns.

Symbol Parameter

Min

Typ(1),(2)

Max

Unit

Test Conditions

AVin

Analog input voltage

Vss- 0.2

Vref + 0.2

Rref

Resistance between Vref and Vss

Ω

Vref(3)

Reference voltage

2.40

3.00

Cai

Analog input Capacitance

pF During sampling

Rai

Analog input Resistor

400

Ω During sampling

INL

Integral non linearity

lsb

Automotive

DNL

Differential non linearity

0.5

lsb

Offset error

-2

lsb

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