HD64F3039F18 Datasheet, PDF (208/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 7 I/O Ports
If bit 6 in PBDDR is read while its value is 1, the value of bit 6 in PBDR will be read directly. If
bit 6 in PBDDR is read while its value is 0, it will always be read as 1.
PBDR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
When port B pins are used for TPC output, PBDR stores output data for TPC output groups 2 and
3. If a bit in the next data enable register (NDERB) is set to 1, the corresponding PBDR bit cannot
be written. In this case, PBDR can be updated only when data is transferred from NDRB.
7.11.3 Pin Functions
The port B pins are also used for TPC output (TP₁₅, TP₁₃ to TP₈), ITU input/output (TIOCB₄,
TIOCB₃, TIOCA₄, TIOCA₃) and output (TOCXB₄, TOCXA₄), and ADTRG input. Table 7.18
describes the selection of pin functions.
Rev.3.00 Mar. 26, 2007 Page 184 of 682
REJ09B0353-0300