3886 datasheet(197/380 Pages) RENESAS

197 / 380 page

2-80

3886 Group User’s Manual

APPLICATION

2.5 Multi-master I2C-BUS interface

Fig. 2.5.7 Structure of I2C START/STOP condition control register

Fig. 2.5.8 Structure of Interrupt source selection register

b7b6b5b4b3b2b1b0

Function

At reset RW

Name

I2C START/STOP condition control register (S2D) [Address : 1716]

I2C START/STOP condition control register

START/STOP condition set bit

(SSC0, SSC1, SSC2, SSC3,

SSC4)(Note)

0 : Falling edge active

1 : Rising edge active

SCL/SDA interrupt pin polarity

selection bit(SIP)

SCL/SDA interrupt pin selection

bit (SIS)

SCL release time

φ(µs) ✕ (SSC+1)

Set up time

φ(µs) ✕ (SSC+1)/2

Hold time

φ(µs) ✕ (SSC+1)/2

0 : SDA valid

1 : SCL valid

START/STOP condition

generating selection bit

(STSPSEL)

0 : Setup/Hold time short mode

1 : Setup/Hold time long mode

Note: Do not set “000002” or an odd number to the START/STOP condition set bit

(SSC4 to SSC0).

Interrupt source selection register

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Name

INT0/input buffer full interrupt

source selection bit

INT1/output buffer empty

interrupt source selection bit

0 : INT0 interrupt

1 : Input buffer full interrupt

INT2/I2C interrupt source

selection bit

CNTR1/key-on wake-up

interrupt source selection bit

0 : INT1 interrupt

1 : Output buffer empty interrupt

Serial I/O1 transmit/SCL,SDA

interrupt source selection bit

CNTR0/SCL,SDA interrupt

source selection bit

0 : Serial I/O1 transmit interrupt

1 : SCL,SDA interrupt

0 : CNTR0 interrupt

1 : SCL,SDA interrupt

Serial I/O2/I2C interrupt

source selection bit

0 : Serial I/O2 interrupt

1 : I2C interrupt

0 : INT2 interrupt

1 : I2C interrupt

0 : CNTR1 interrupt

1 : Key-on wake-up interrupt

AD converter/key-on wake-up

interrupt source selection bit

0 : A-D converter interrupt

1 : Key-on wake-up interrupt

✽1: Do not write “1” to these bits simultaneously.

✽2: Do not write “1” to these bits simultaneously.

✽3: Do not write “1” to these bits simultaneously.

Interrupt source selection register [INTSEL: address 003916]

✽1

✽2

✽3

✽1

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