SH7032 Datasheet, PDF (75/687 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 3 Operating Modes
Section 3 Operating Modes
3.1 Types of Operating Modes and Their Selection
The SH7032 microcomputer operates in one of two operating modes (modes 0 and 1) and the
SH7034 operates in one of four operating modes (modes 0, 1, 2, and 7). Modes 0 and 1 differ in
the bus width of memory area 0. The mode is selected by the mode pins (MD2–MD0) as indicated
in table 3.1. Do not change the mode selection while the chip is operating.
Table 3.1 Operating Mode Selection
Pin Settings
Operating Mode
Mode 0*²
Mode 1*²
MD2
0
0
MD1
0
0
MD0
0
1
Mode Name
MCU mode 0
MCU mode 1
Bus Width of Area 0
8 bits
16 bits
Mode 2
Mode 7*¹
0
1
0
MCU mode 2 On-chip ROM
1
1
1
PROM mode —
Notes: 1. SH7034 PROM version only
2. Only modes 0 and 1 are available in the SH7032 and SH7034 ROMless version.
3.2 Operating Mode Descriptions
3.2.1 Mode 0 (MCU Mode 0)
In mode 0, memory area 0 has an eight-bit bus width. For the memory map, see section 8, Bus
State Controller (BSC).
3.2.2 Mode 1 (MCU Mode 1)
In mode 1, memory area 0 has a 16-bit bus width.
3.2.3 Mode 2 (MCU Mode 2)
In mode 2, memory area 0 is assigned to the on-chip ROM. Mode 2 should only be set for the
product is the SH7034.
Rev. 7.00 Jan 31, 2006 page 49 of 658
REJ09B0272-0700