SH7146 Datasheet, PDF (761/1022 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 18 I/O Ports
18.2.3 Port B Port Registers H and L (PBPRH and PBPRL)
The port B port registers H and L (PBPRH and PBPRL) are 16-bit read-only registers that always
return the states of the pins regardless of the PFC setting. Bits PB18PR to PB16PR and PB5PR to
PB2PR correspond to pins PB18 to PB16 and PB5 to PB2, respectively (multiplexed functions
omitted here) in the SH7146. Bits PB18PR to PB16PR and PB5PR to PB0PR correspond to pins
PB18 to PB16 and PB5 to PB0, respectively (multiplexed functions omitted here) in the SH7149.
• PBPRH
Bit: 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
PB18 PB17 PB16
PR PR PR
Initial value: 0
0
0
0
0
0
0
0
0
0
0
0
0
*
*
*
R/W: R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Initial
Bit
Bit Name Value R/W
15 to 3 
All 0
R
2
PB18PR Pin state R
1
PB17PR Pin state R
0
PB16PR Pin state R
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
The pin state is returned regardless of the PFC setting.
These bits cannot be modified.
Rev. 3.00 May 17, 2007 Page 717 of 974
REJ09B0229-0300