 |
công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
|
công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
SH7052 bảng dữ liệu(PDF) 602 Page - Renesas Technology Corp |
|
|
|||||||||||||||||||||||||||||
SH7052 bảng dữ liệu(HTML) 602 Page - Renesas Technology Corp |
|
|
602 / 919 page  576 16.3 CPU Interface A/D data registers 0 to 15 (ADDR0 to ADDR15) are 16-bit registers, but they are connected to the CPU by an 8-bit data bus. Therefore, the upper and lower bytes must be read separately. To prevent the data being changed between the reads of the upper and lower bytes of an A/D data register, the lower byte is read via a temporary register (TEMP). The upper byte can be read directly. Data is read from an A/D data register as follows. When the upper byte is read, the upper-byte value is transferred directly to the CPU and the lower-byte value is transferred into TEMP. Next, when the lower byte is read, the TEMP contents are transferred to the CPU. When performing byte-size reads on an A/D data register, always read the upper byte before the lower byte. It is possible to read only the upper byte, but if only the lower byte is read, incorrect data may be obtained. If a word-size read is performed on an A/D data register, reading is performed in upper byte, lower byte order automatically. Figure 16.2 shows the data flow for access to an A/D data register. CPU (H'AA) TEMP (H'40) ADDRnL (H'40) ADDRnH (H'AA) Module data bus Upper-byte read CPU (H'40) TEMP (H'40) ADDRnL (H'40) ADDRnH (H'AA) Bus interface Module data bus Lower-byte read Bus interface Figure 16.2 A/D Data Register Access Operation (Reading H'AA40) |
|
Link URL |
| Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Liên kết đến bảng dữ liệu | Trao đổi link | Tìm kiếm theo nhà sản xuất 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 |
Vietnamese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
