H8SSLASH2224 datasheet(740/1071 Pages) RENESAS

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Section 16 I

2C Bus Interface (IIC) (Option)

Rev. 5.00 Aug 08, 2006 page 654 of 982

REJ09B0054-0500

SLA

DATA

(a) I2C bus format (FS = 0 or FSX = 0)

(b) I2C bus format (start condition retransmission, FS = 0 or FSX = 0)

n: transfer bit count

(n = 1 to 8)

m: transfer frame count

≥ 1)

SLA

DATA

SLA

DATA

n1 and n2: transfer bit count (n1 and n2 = 1 to 8)

m1 and m2: transfer frame count (m1 and m2

≥ 1)

Figure 16.3 I2C Bus Data Formats (I2C Bus Formats)

DATA

FS = 1 and FSX = 1

n: transfer bit count

(n = 1 to 8)

m: transfer frame count

≥ 1)

Figure 16.4 I2C Bus Data Format (Serial Format)

SDA

SCL

1 to 7

SLA

1 to 7

DATA

1 to 7

DATA

Figure 16.5 I2C Bus Timing

Legend:

Start condition. The master device drives SDA from high to low while SCL is high

SLA:

Slave address

Indicates the direction of data transfer: from the slave device to the master device when

W is 1, or from the master device to the slave device when R/W is 0

Acknowledge. The receiving device drives SDA

DATA: Transferred data

Stop condition. The master device drives SDA from low to high while SCL is high

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