3886 datasheet(247/380 Pages) RENESAS

247 / 380 page

2-130

3886 Group User’s Manual

APPLICATION

2.9 Bus interface

Fig. 2.9.4 Structure of Data bus buffer control register

Fig. 2.9.5 Structure of Interrupt source selection register

0 : P42 functions as port I/O pin.

1 : P42 functions as OBF00 output

pin.

Data bus buffer control register

b7b6b5b4b3b2b1b0

Function

At reset RW

Name

Data bus buffer control register (DBBCON) [Address 2A16]

Fix this bit to “0”.

Data bus buffer enable bit

Data bus buffer function

selection bit

0 : P50–P53, P8 I/O port

1 : Data bus buffer enabled

OBF10 output enable bit

Input level selection bit

OBF0 output selection bit

OBF00 output enable bit

OBF01 output enable bit

0 : Single data bus buffer mode

(P4 7 functions as I/O port.)

1 : Double data bus buffer mode

(P4 7 functions as S1 input.)

0 : OBF00 valid

1 : OBF01 valid

0 : P43 functions as port I/O pin.

1 : P43 functions as OBF01 output

pin.

0 : P46 functions as port I/O pin.

1 : P46 functions as OBF10 output

pin.

0 : CMOS level input

1 : TTL level input

Interrupt source selection register

b7b6b5b4b3b2b1b0

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 3916]

✽1

✽2

✽3

✽1

3886 Datasheet(PDF) 247 Page - Renesas Technology Corp

3886 Datasheet(HTML) 247 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL