SH7055S Datasheet, PDF (777/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Table 22.1 Relationship between FWE and MD Pins and Operating Modes
Mode
ROM
ROM
User
User
Reset
Invalid Valid
Program Boot Boot Programmer
Pin
State
Mode Mode
Mode
Mode Mode Mode
RES
0
1
1
1
1
1
1
FWE
0/1
0
0
1
1
1
0/1
MD0
0/1
0/1*¹
0/1*²
0/1*²
0/1*²
0/1*²
1
MD1
0/1
0
1
1
0
0
1
MD2
0/1
1
1
1
0
1
0
Notes: *1 MD0 = 0: 8-bit external bus, MD0 = 1: 16-bit external bus
*2 MD0 = 0: External bus can be used, MD0 = 1: Single-chip mode (external bus cannot
be used)
22.2.3 Mode Comparison
The comparison table of programming and erasing related items about boot mode, user program
mode, user boot mode, and programmer mode is shown in table 22.2.
Rev.2.0, 07/03, page 739 of 960