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S-24CM01C Datasheet(PDF) 8 Page - Seiko Instruments Inc |
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S-24CM01C Datasheet(HTML) 8 Page - Seiko Instruments Inc |
8 / 32 page 2-WIRE SERIAL E2PROM S-24CM01C Rev.2.0_02_S 8 Pin Functions 1. A1 and A2 (Slave address input) pins In the S-24CM01C, to set the slave address, connect each pin of A1, A2 to GND or VCC. Therefore the users can set 4 types of slave address by a combination of A1, A2 pins. Comparing the slave address transmitted from the master device and one that you set, makes possible to select the S-24CM01C from other devices connected onto the bus. Each A1 and A2 pin has a pull-down resistor. In open, these pins have the status when they are connected to GND. 2. SDA (Serial data input / output) pin The SDA pin is used for the bi-directional transmission of serial data. This pin is a signal input pin, and an Nch open drain output pin. In use, generally, connect the SDA line to any other device which has the open-drain or open-collector output with Wired-OR connection by pulling up to VCC by a resistor (Figure 6 shows the relation with an output load). 3. SCL (Serial clock input) pin The SCL pin is used for the serial clock input. Since the signals are processed at a rising or falling edge of the SCL clock, pay attention to the rising and falling time and comply with the specification. 4. WP (Write protect input) pin The write protect is enabled by connecting the WP pin to VCC. When not using the write protect, connect this pin to GND or set in open. Maximum value of pull-up resistor [k Ω] 10 0 2 4 6 8 10 12 14 16 18 20 100 200 fSCL= 400 kHz fSCL= 1000 kHz Value of load capacity [pF] Figure 6 Output Load Initial Shipment Data Initial shipment data of all addresses is “FFh”. |
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