Mode 5 (Expanded Mode With On-Chip Rom Disabled); Mode 6 (Expanded Mode With On-Chip Rom Enabled); Mode 7 (Single-Chip Mode); Modes 8 And 9 (H8S/2318 F-Ztat, H8S/2317 F-Ztat, H8S/2315 F-Ztat, And H8S/2314 F-Ztat Only) - Renesas H8S/2319 series Hardware Manual

3.3.5

Mode 5 (Expanded Mode with On-Chip ROM Disabled)

The CPU can access a 16-Mbyte address space in advanced mode. The on-chip ROM is disabled.
Pins P13 to P10, ports A, B, and C function as an address bus, port D functions as a data bus, and
part of port F carries bus control signals.
Pins P13 to P10 function as input ports immediately after a reset. These pins can be set to output
addresses by setting the corresponding data direction register (DDR) bits and A23E to A20E in
PFCR1 to 1.
The initial bus mode after a reset is 8 bits, with 8-bit access to all areas. However, note that if at
least one area is designated for 16-bit access by the bus controller, the bus mode switches to 16
bits and port E becomes a data bus.
3.3.6

Mode 6 (Expanded Mode with On-Chip ROM Enabled)

The CPU can access a 16-Mbyte address space in advanced mode. The on-chip ROM is enabled.
Pins P13 to P10, ports A, B, and C function as input ports immediately after a reset. These pins
can be set to output addresses by setting the corresponding data direction register (DDR) bits and
A23E to A20E in PFCR1 to 1. Port D functions as a data bus, and part of port F carries bus control
signals.
The initial bus mode after a reset is 8 bits, with 8-bit access to all areas. However, note that if at
least one area is designated for 16-bit access by the bus controller, the bus mode switches to 16
bits and port E becomes a data bus.
3.3.7

Mode 7 (Single-Chip Mode)

The CPU can access a 16-Mbyte address space in advanced mode. The on-chip ROM is enabled,
but external addresses cannot be accessed.
All I/O ports are available for use as input/output ports.
3.3.8 Modes 8 and 9 (H8S/2318 F-ZTAT, H8S/2317 F-ZTAT, H8S/2315 F-ZTAT, and
H8S/2314 F-ZTAT Only)
Modes 8 and 9 are not supported in the H8S/2319 and H8S/2318 Groups, and must not be set.
Rev. 5.00, 12/03, page 76 of 1088