S-24CS02APH-TBH-G Ver la hoja de datos (PDF) - Seiko Instruments Inc

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S-24CS02APH-TBH-G

(S-24CS0xA) 2-Wire CMOS Serial E2PROM

Seiko Instruments Inc 

2-WIRE CMOS SERIAL E2PROM

S-24CS01A/02A/04A/08A

Rev.4.4_00

„ Using S-24CS01A/02A/04A/08A

1. Adding a pull-up resistor to SDA I/O pin and SCL input pin

Add a 1 to 5 kΩ pull-up resistor to the SCL input pin*1 and the SDA I/O pin in order to enable the functions

of the I2C-bus protocol. Normal communication cannot be provided without a pull-up resistor.

*1. When the SCL input pin of the E2PROM is connected to a tri-state output pin of the microprocessor,

connect the same pull-up resistor to prevent a high impedance status from being input to the SCL

input pin.

This protects the E2PROM from malfunction due to an undefined output (high impedance) from the tri-

state pin when the microprocessor is reset when the voltage drops.

2. I/O pin equivalent circuit

The I/O pins of this IC do not include pull-up and pull-down resistors. The SDA pin is an open-drain output.

The following shows the equivalent circuits.

SCL

SDA

Figure 22 SCL Pin

Figure 23 SDA Pin

20

Seiko Instruments Inc.

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