 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
H8S/2240 数据表(PDF) 574 Page - Renesas Technology Corp |
|
|
|||||||||||||||||||||||||||||
H8S/2240 数据表(HTML) 574 Page - Renesas Technology Corp |
|
|
574 / 818 page  Section 16 ROM Rev.3.00 Mar. 26, 2007 Page 532 of 772 REJ09B0355-0300 16.3 Operation The on-chip ROM is connected to the CPU by a 16-bit data bus, and both byte and word data can be accessed in one state. Even addresses are connected to the upper 8 bits, and odd addresses to the lower 8 bits. Word data must start at an even address. The on-chip ROM is enabled and disabled by setting the mode pins (MD 2, MD1, and MD0) and bit EAE in BCRL. These settings are shown in table 16.2. In the H8S/2246, H8S/2245, H8S/2244, and H8S/2243 normal mode, a maximum of 56 kbytes of ROM can be used. Table 16.2 Operating Modes and ROM Area Mode Pin Setting BCRL On-Chip ROM Operating Mode MD 2 MD 1 MD 0 EAE H8S/2246 and H8S/2245 H8S/2244 and H8S/2243 H8S/2242 and H8S/2241 Mode 1 Normal expanded mode with on-chip ROM disabled 0 0 1 — Disabled Disabled Disabled Mode 2 Normal expanded mode with on-chip ROM enabled 10 — Enabled (56 kbytes) Enabled (56 kbytes) Enabled (32 kbytes) Mode 3 Normal single-chip mode 1 Mode 4 Advanced expanded mode with on-chip ROM disabled 1 0 0 — Disabled Disabled Disabled Mode 5 Advanced expanded mode with on-chip ROM disabled 1 Mode 6 1 0 0 Enabled (128 kbytes) Enabled (64 kbytes) Enabled (32 kbytes) Advanced expanded mode with on-chip ROM enabled 1 Enabled (64 kbytes) Mode 7 Advanced single-chip mode 10 Enabled (128 kbytes) 1 Enabled (64 kbytes) In H8S/2246 and H8S/2245 modes 6 and 7, the on-chip ROM available after a power-on reset is the 64-kbyte area comprising addresses H'000000 to H'00FFFF. |
|
链接网址 |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 数据表链接 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
