SH7618 Datasheet, PDF (492/646 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series

Section 17 I/O Ports
When the pin function is general input port, not the value of register but pin state is directly read if
PBDRL is read. Data can be written to PBDRL but no effect on the pin state. Table 17.2 shows the
reading/writing function of the port B data register L.
Initial
Bit Bit Name Value R/W Description
15 
0
R
Reserved
14 
0
R
These bits are always read as 0. The write value should
always be 0.
13 PB13DR 0
R/W See table 17.2.
12 PB12DR 0
R/W
11 PB11DR 0
R/W
10 PB10DR 0
R/W
9
PB9DR 0
R/W
8
PB8DR 0
R/W
7
PB7DR 0
R/W
6
PB6DR 0
R/W
5
PB5DR 0
R/W
4
PB4DR 0
R/W
3
PB3DR 0
R/W
2
PB2DR 0
R/W
1
PB1DR 0
R/W
0
PB0DR 0
R/W
Table 17.2 Port B Data Register L (PBDRL) Read/Write Operation
• Bits 13 to 0 in PBDRL
Pin Function
General input
PBIORL
0
Read
Pin state
General output 1
Other functions *
PBDRL value
PBDRL value
Write
Data can be written to PBDRL but no effect on
the pin state.
Written value is output from the pin.
Data can be written to PBDRL but no effect on
the pin state.
Rev. 6.00 Jun. 12, 2007 Page 460 of 610
REJ09B0131-0600