 |
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 |
|
ST92F124 数据表(PDF) 425 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
ST92F124 数据表(HTML) 425 Page - STMicroelectronics |
|
|
425 / 429 page  425/429 ST92F124/F150/F250 - KNOWN LIMITATIONS KNOWN LIMITATIONS (Cont’d) Figure 8. Impact of negative current injection on adjacent pin Impact on application If the adjacent I/O is used as an analog input (Port 7 and 8 only), the current drawn through the ex- ternal resistor generates a difference in potential, resulting in a conversion error. 13.8.5 I2CECCR REGISTER LIMITATION It is not possible to write to the CC7 and CC8 bits in the I2CECCR register. These bits remain at their reset value (0). Impact on application The baudrate prescaler cannot be higher than 258 (CC8:7=0 and CC6:0=1). As a consequence, the baudrate cannot be lower than fSCL=INTCLK/258 Workaround None. 13.8.6 I2C BEHAVIOUR DISTURBED DURING DMA TRANSACTIONS Description If a DMA transfer occurs on SCI-M, MFT or J1850 during I2C transmission or reception, I2C periph- eral may be disturbed. In transmission mode, additional bytes can be ob- served on I2C lines (SDA and SCL). In reception mode, additional bytes can be seen in the I2CDR register. Workaround Avoid using DMA transfer while I2C peripheral is running. 13.8.7 MFT DMA MASK BIT RESET The limitation described in Section 13.7 on page 419 applies whatever the MFT0 DMA priority level. 13.8.8 DMA DATA CORRUPTED BY MFT INPUT CAPTURE Description If the MFT requests a DMA transfer following an input capture event and while a DMA transfer is currently ongoing to or from another peripheral (SCI-M, I2C, or second MFT), the DMA data is cor- rupted (overwritten by the captured data). Workaround Avoid using the MFT Input Capture function in DMA mode while another peripheral is in DMA mode. 0 50 100 150 200 250 300 350 0 5 10 15 20 25 30 Current injection (mA) Current drawn from adjacent pin (uA, absolute value) 1 |
|
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
