 |
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 |
|
ST7MC1K2-Auto 数据表(PDF) 129 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
ST7MC1K2-Auto 数据表(HTML) 129 Page - STMicroelectronics |
|
|
129 / 371 page  Obsolete Product(s) - Obsolete Product(s) ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto On-chip peripherals 129/371 Figure 55. Single master/single slave application Slave select management As an alternative to using the SS pin to control the slave select signal, the application can choose to manage the slave select signal by software. This is configured by the SSM bit in the SPICSR register (see Figure 57). In software management, the external SS pin is free for other application uses and the internal SS signal level is driven by writing to the SSI bit in the SPICSR register. In master mode SS internal must be held high continuously. In slave mode, there are two cases depending on the data/clock timing relationship (see Figure 56): If CPHA = 1 (data latched on second clock edge) ● SS internal must be held low during the entire transmission. This implies that in single slave applications the SS pin either can be tied to VSS, or made free for standard I/O by managing the SS function by software (SSM = 1 and SSI = 0 in the in the SPICSR register) If CPHA = 0 (data latched on first clock edge) ● SS internal must be held low during byte transmission and pulled high between each byte to allow the slave to write to the shift register. If SS is not pulled high, a write collision error occurs when the slave writes to the shift register (see Write collision error (WCOL) on page 133). Figure 56. Generic SS timing diagram 8-bit shift register SPI clock generator 8-bit shift register MISO MOSI MOSI MISO SCK SCK Slave Master SS SS +5V MSBit LSBit MSBit LSBit Not used if SS is managed by software MOSI/MISO Master SS Slave SS (if CPHA = 0) Slave SS (if CPHA = 1) Byte 2 Byte 1Byte 3 Obsolete Product(s) - Obsolete Product(s) |
|
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
