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TC90A80F Datenblatt(PDF) 7 Page - Toshiba Semiconductor |
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TC90A80F Datenblatt(HTML) 7 Page - Toshiba Semiconductor |
7 / 23 page TC90A80N/F 2002-12-04 7 IC Control Specifications • Functions and characteristics of this IC are set using the I2C bus. • The data transfer format conforms to the Philips I2C bus format. • When reset signal is applied, the following DATA bits are all cleared to 0. • Data transfer format S Slave address (8 bits) A DATA1 A DATA2 A DATA3 A DATA4 A P Slave address: B4H S: Start condition, A: Acknowledgement, P: Stop condition • Outline of I2C bus format I2C bus transfers data between ICs using two lines: data (SDA) and clock (SCL). The I2C bus starts according to the start condition and ends according to the stop condition. The start condition is satisfied if SDA changes from High to Low when SCL is High. The stop condition is satisfied if SDA changes from Low to High when SCL is High. The length of data to be transferred is 8 bits. Data are transferred via the SDA line. An acknowledge (ACK) bit is required after a data byte. The bus line must be pulled up to the power supply level using a resistor. When SCL is High, data must not be changed. • I2C bus control signal timing Characteristics Symbol Min Max Unit SCL clock frequency fSCL 0 100 kHz Hold time to satisfy start condition tHD; STA 4.0 ― µs SCL clock Low period tLOW 4.7 ― µs SCL clock High period tHIGH 4.0 ― µs Data hold time tHD; DAT 0 3.45 µs Data setup time tSU; DAT 250 ― ns SDA/SCL signal rise time tr ― 1000 ns SDA/SCL signal fall time tf ― 300 ns Stop condition setup time tSU; STO 4.0 ― µs Bus free time between stop and start conditions tBUF 4.7 ― µs Purchase of TOSHIBA I2C components conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips. Date Clock Start Condition tHD; STA tLOW tHIGH tSU; DAT tHD; DAT tSU; STO tBUF tr tr tf tf Stop Condition Don’t change the data while clock is in High level. |
Ähnliche Teilenummer - TC90A80F |
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Ähnliche Beschreibung - TC90A80F |
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