Rainbow-electronics T89C51CC01 Bedienungsanleitung PDF herunterladen (Seite 136)

136

T89C51CC01

Rev. D – 17-Dec-01

Figure 61. Clock Signal Waveform for I

Tests in Active and Idle Modes

19.3 DC Parameters for A/D Converter

Table 94. DC Parameters for AD Converter in Precision conversion

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

19.4 AC Parameters

19.4.1 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:T

AVLL

= Time for Address Valid to ALE Low.

LLPL

= Time for ALE Low to PSEN Low.

A =-40°Cto+85°C; V

=0V;V

=5V±10%; F = 0 to 40 MHz.

A =-40°Cto+85°C; V

=0V;V

=5V± 10%.

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

outputs = 60 pF.)

Table 95, Table 98 and Table 101 give the description of each AC symbols.

Table 96, Table 100 and Table 102 give for each range the AC parameter.

Table 97, Table 100 and Table 103 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: T

LLIV

and 20 MHz, Standard clock.

x = 30 ns

T = 50 ns

CCIV

= 4T - x = 170 ns

-0.5V

0.45V

0.7V

0.2V

-0.1

CLCH

CHCL

CLCH

CHCL

=5ns.

Symbol Parameter Min Typ

(1)

Max Unit Test Conditions

AVin Analog input voltage Vss- 0.2

Vref +0.2 V

Rref Resistance between Vref and Vss 12 16 24

Vref Reference voltage 2.40 3.00 V

Cai Analog input Capacitance 60 pF During sampling

INL Integral non linearity 1 2 lsb

DNL Differential non linearity 0.5 1 lsb

OE Offset error -2 2 lsb

1 2 ... 131 132 133 134 135 136 137 138 139 140 141 ... 148 149

T89C51CC01 1

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