HD64F2168 Datasheet, PDF (273/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

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 Pin states can be read by performing a read cycle on
6
PB6PIN
Undefined* R
this register.
5
PB5PIN
Undefined* R
This register is assigned to the same address as that
of P8DDR. When this register is written to, data is
4
PB4PIN Undefined* R _{written to P8DDR and the port 8 setting is then}
3
PB3PIN
Undefined* R
changed.
2
PB2PIN Undefined* R
1
PB1PIN Undefined* R
0
PB0PIN Undefined* R
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
Event counter^*1
Pin function
Disable
PB7 input pin
0
Enable
EVENT15 input pin
1

PB7 output pin
• PB6/EVENT14
PB6DDR
Event counter^*1
Pin function
Disable
PB6 input pin
0
Enable
EVENT14 input pin
1

PB6 output pin
Rev. 3.00, 03/04, page 233 of 830