SH7055S Datasheet, PDF (718/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

20.3.17 Port H Control Register (PHCR)
Bit: 15
14
13
12
11
10
9
8
PH15 PH14 PH13 PH12 PH11 PH10 PH9 PH8
MD
MD
MD
MD
MD
MD
MD
MD
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Bit: 7
6
5
4
3
2
1
0
PH7 PH6 PH5 PH4 PH3 PH2 PH1 PH0
MD
MD
MD
MD
MD
MD
MD
MD
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
The port H control register (PHCR) is a 16-bit readable/writable register that selects the functions
of the 16 multiplex pins in port H. PHCR settings are not valid in all operating modes.
1. Expanded mode with on-chip ROM disabled (area 0: 8-bit bus)
Port H pins D0 to D7 function as data input/output pins, and PHCR settings are invalid.
2. Expanded mode with on-chip ROM disabled (area 0: 16-bit bus)
Port H pins function as data input/output pins, and PHCR settings are invalid.
3. Expanded mode with on-chip ROM enabled
Port H pins are multiplexed as data input/output pins and general input/output pins. PHCR
settings are valid.
4. Single-chip mode
Port H pins function as general input/output pins, and PHCR settings are invalid.
PHCR is initialized to H'0000 by a power-on reset (excluding a WDT power-on reset), and in
hardware standby mode. It is not initialized in software standby mode or sleep mode.
Rev.2.0, 07/03, page 680 of 960