Datasheet

Rev. 3.00, 03/04, page 233 of 830

8.11.3 Port B Input Data Register (PBPIN)

PBPIN indicates the pin states.

Bit Bit Name Initial Value R/W Description

7 PB7PIN Undefined* R

6 PB6PIN Undefined* R

5 PB5PIN Undefined* R

4 PB4PIN Undefined* R

3 PB3PIN Undefined* R

2 PB2PIN Undefined* R

1 PB1PIN Undefined* R

0 PB0PIN Undefined* R

Pin states can be read by performing a read cycle on

this register.

This register is assigned to the same address as that

of P8DDR. When this register is written to, data is

written to P8DDR and the port 8 setting is then

changed.

Note: The initial value of these pins is determined in accordance with the state of pins PB7 to

PB0.

8.11.4 Pin Functions

Port B is a multi-function port that can function as an event counter input pin. The relationship

between the operating mode setup and pin functions is described below.

When this pin is used as the EVENT input pin according to bits ECSB3 to ECSB0 in ECCR of the

data transfer controller settings, clear the PBnDDR bit to 0. (n = 7 to 0 )

• PB7/EVENT15

PB7DDR 0 1

Event counter

Disable Enable 

Pin function PB7 input pin EVENT15 input pin PB7 output pin

• PB6/EVENT14

PB6DDR 0 1

Event counter

Disable Enable 

Pin function PB6 input pin EVENT14 input pin PB6 output pin