7220 datasheet(254/303 Pages) RENESAS

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7220 Group User’s Manual

APPENDIX

6.7 Control registers

6-35

b7 b6 b5 b4 b3 b2 b1 b0

Bit counter

(Number of transmit/recieve

bits)

(BC0 to BC2)

b2 b1 b0

0 : 8

1 : 7

0 : 6

1 : 5

0 : 4

1 : 3

0 : 2

1 : 1

I2C-BUS interface use

enable bit (ESO)

0 : Disabled

1 : Enabled

Data format selection bit

(ALS)

0 : Addressing mode

1 : Free data format

Addressing format selection

bit (10BIT SAD)

0 : 7-bit addressing format

1 : 10-bit addressing format

6, 7 Connection control bits

between I C-BUS interface

and ports

(BSEL0, BSEL1)

b7 b6 Connection port

0 : None

1 : SCL1, SDA1

0 : SCL2, SDA2

1 : SCL1, SDA1

SCL2, SDA2

I2C control register (S1D : address 00DA 16)

I2C Control Register

Name

Functions

After reset RW

Note: When using ports P11-P14 as I C-BUS interface, the output structure changes

automatically from CMOS output to N-channel open-drain output. However, set

the port direction register to “1” (output mode).

Fig. 6.7.10 I2C control register

Address 00DA16

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