7220 datasheet(253/303 Pages) RENESAS

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APPENDIX

6.7 Control registers

7220 Group User’s Manual

6-34

Fig. 6.7.9 I2C status register

b7 b6 b5 b4 b3 b2 b1 b0

I2C status register (S1) [Address 00D916]

I2C Status Register

6, 7

b7 b6

0 : Slave recieve mode

1 : Slave transmit mode

0 : Master recieve mode

1 : Master transmit mode

Name

Functions

After reset RW

Communication mode

specification bits

(TRX, MST)

0 : Bus free

1 : Bus busy

Bus busy flag (BB)

0 : Interrupt request issued

1 : No interrupt request issued

I2C-BUS interface interrupt

request bit (PIN)

0 : Not detected

1 : Detected

Arbitration lost detecting flag

(AL) (See note)

0 : Address mismatch

1 : Address match

Slave address comparison

flag (AAS) (See note)

0 : No general call detected

1 : General call detected

General call detecting flag

(AD0) (See note)

0 : Last bit = “0 ”

1 : Last bit = “1 ”

Last receive bit (LRB)

(See note)

Note : These bits and flags can be read out, but cannnot be written.

Indeterminate R—

R—

Address 00D916

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