SMCXXXBF datasheet(22/91 Pages) STMICROELECTRONICS

22 / 91 page

Electrical interface

SMCxxxBF

22/91

4.2

Electrical Specification

Table 10 defines the DC Characteristics for the CompactFlash Memory Card. Unless

otherwise stated, conditions are:

●

VCC = 5V ± 10%

●

VCC = 3.3V ± 5%

●

-40 °C to 85 °C

Table 11 shows that the Card operates correctly in both the voltage ranges and that the

current requirements must not exceed the maximum limit shown.

4.3

Current Measurement

The current is measured by connecting an amp meter in series with the VCC supply. The

meter should be set to the 2A scale range, and have a fast current probe with an RC filter

with a time constant of 0.1ms. Current measurements are taken while looping on a data

transfer command with a sector count of 128. Current consumption values for both read and

write commands are not to exceed the Maximum Average RMS Current specified in

Table 11 Table 12 shows the Input Leakage Current, Table 11 the Input Characteristics,

Table 13 the Output Drive Type and Table 15 the Output Drive Characteristics.

Table 10.

Absolute Maximum Conditions

Parameter

Symbol

Conditions

Input Power

VCC

− 0.3V to 6.5V

Voltage on any pin except VCC with respect to GND

− 0.5V to V

CC + 0.5V

Table 11.

Input Power

Voltage

Maximum Average RMS Current

Measurement Conditions

3.3V ± 5%

− 40 +85 °C

5V ± 10%

100

− 40 +85°C

Table 12.

Input Leakage Current(1)

x refers to the characteristics described in Table 13 For example, I1U indicates a pull up resistor with a

type 1 input characteristic.

Type

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

IxZ

Input Leakage Current

VIH = VCC

− 11

µA

VIL = GND

IxU

Pull Up Resistor

RPU1

VCC = 5.0V

500

Ω

IxD

Pull Down Resistor

RPD1

VCC = 5.0V

500

Ω

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