D12320VF25V Datasheet, PDF (113/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 3 MCU Operating Modes
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
Modes 8 and 9 are not supported in the H8S/2319 Group, and must not be set.
3.3.9
Mode 10 (H8S/2318 F-ZTAT, H8S/2317 F-ZTAT, H8S/2315 F-ZTAT, and
H8S/2314 F-ZTAT Only)
This is a flash memory boot mode. For details, see section 17, ROM.
Except for the fact that flash memory programming and erasing can be performed, operation in
this mode is the same as in advanced expanded mode with on-chip ROM enabled.
3.3.10 Mode 11 (H8S/2318 F-ZTAT, H8S/2317 F-ZTAT, H8S/2315 F-ZTAT, and
H8S/2314 F-ZTAT Only)
This is a flash memory boot mode. For details, see section 17, ROM.
Except for the fact that flash memory programming and erasing can be performed, operation in
this mode is the same as in advanced single-chip mode.
Rev.7.00 Feb. 14, 2007 page 79 of 1108
REJ09B0089-0700