SH7720 Datasheet, PDF (1244/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 35 I/O Ports
35.2.2 Port B Data Register (PBDR)
PBDR is a register that stores data for pins PTB7 to PTB0. Bits PB7DT to PB0DT correspond to
pins PTB7 to PTB0. When the pin function is general output port, if the port is read, the value of
the corresponding PBDR bit is returned directly. When the function is general input port, if the
port is read, the corresponding pin level is read.
Initial
Bit Bit Name Value R/W Description
7
PB7DT 0
R/W Table 35.2 shows the function of PBDR.
6
PB6DT 0
R/W
5
PB5DT 0
R/W
4
PB4DT 0
R/W
3
PB3DT 0
R/W
2
PB2DT 0
R/W
1
PB1DT 0
R/W
0
PB0DT 0
R/W
Table 35.2 Port B Data Register (PBDR) Read/Write Operations
PBCR State
PBnMD1 PBnMD0 Pin State
Read
Write
0
0
Other function PBDR value Value is written to PBDR, but does not affect
pin state.
1
Output
PBDR value Write value is output from pin.
1
0
Input (Pull-up Pin state
Value is written to PBDR, but does not affect
MOS on)
pin state.
1
Input (Pull-up Pin state
Value is written to PBDR, but does not affect
MOS off)
pin state.
Note: n = 7 to 0
Rev. 3.00 Jan. 18, 2008 Page 1182 of 1458
REJ09B0033-0300