HD64F3039F18 Datasheet, PDF (86/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 3 MCU Operating Modes
3.4 Operating Mode Descriptions
3.4.1 Mode 1
Ports 1, 2, and 5 function as address pins A₁₉ to A₀, permitting access to a maximum 1-Mbyte
address space. The initial bus mode after a reset is 8 bits, with 8-bit access to all areas.
3.4.2 Mode 3
Ports 1, 2, and 5 and part of port A function as address pins A₂₃ to A₀, permitting access to a
maximum 16-Mbyte address space. The initial bus mode after a reset is 8 bits, with 8-bit access to
all areas. A₂₃ to A₂₁ are valid when 0 is written in bits 7 to 5 of the bus release control register
(BRCR). (In this mode A₂₀ is always used for address output.)
3.4.3 Mode 5
Ports 1, 2, and 5 can function as address pins A₁₉ to A₀, permitting access to a maximum 1-Mbyte
address space, but following a reset they are input ports. To use ports 1, 2, and 5 as an address bus,
the corresponding bits in their data direction registers (P1DDR, P2DDR, and P5DDR) must be set
to 1. The address bus width can be selected freely by setting DDR of ports 1, 2, and 5. The initial
bus mode after a reset is 8 bits, with 8-bit access to all areas.
3.4.4 Mode 6
This mode operates using the on-chip ROM, RAM, and registers. All I/O ports are available.
Mode 6 is a normal mode with 64-kbyte address space.
3.4.5 Mode 7
This mode is an advanced mode with a 1-Mbyte address space which operates using the on-chip
ROM, RAM, and registers. All I/O ports are available.
Note: The H8/3039 Group cannot be used in mode 2 and 4.
Rev.3.00 Mar. 26, 2007 Page 62 of 682
REJ09B0353-0300