 |
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 |
|
ST72340 数据表(PDF) 42 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
ST72340 数据表(HTML) 42 Page - STMicroelectronics |
|
|
42 / 191 page  ST72340, ST72344, ST72345 42/191 INTERRUPTS (Cont’d) 8.7 EXTERNAL INTERRUPT CONTROL REGISTER (EICR) Read/Write Reset Value: 0000 0000 (00h) Bit 7:6 = IS1[1:0] ei2 and ei3 sensitivity The interrupt sensitivity, defined using the IS1[1:0] bits, is applied to the following external interrupts: - ei2 (port B3..0) - ei3 (port B4) These 2 bits can be written only when I1 and I0 of the CC register are both set to 1 (level 3). Bit 5 = IPB Interrupt polarity for port B This bit is used to invert the sensitivity of the port B [3:0] external interrupts. It can be set and cleared by software only when I1 and I0 of the CC register are both set to 1 (level 3). 0: No sensitivity inversion 1: Sensitivity inversion Bit 4:3 = IS2[1:0] ei0 and ei1 sensitivity The interrupt sensitivity, defined using the IS2[1:0] bits, is applied to the following external interrupts: - ei0 (port A3, port E1) - ei1 (port F2..0) These 2 bits can be written only when I1 and I0 of the CC register are both set to 1 (level 3). Bit 2 = IPA Interrupt polarity for ports A3 and E1 This bit is used to invert the sensitivity of the port A3 and E1 external interrupts. It can be set and cleared by software only when I1 and I0 of the CC register are both set to 1 (level 3). 0: No sensitivity inversion 1: Sensitivity inversion Bits 1:0 = Reserved, must always be kept cleared. 70 IS11 IS10 IPB IS21 IS20 IPA 0 0 IS11 IS10 External Interrupt Sensitivity IPB bit =0 IPB bit =1 00 Falling edge & low level Rising edge & high level 0 1 Rising edge only Falling edge only 1 0 Falling edge only Rising edge only 1 1 Rising and falling edge IS11 IS10 External Interrupt Sensitivity 0 0 Falling edge & low level 0 1 Rising edge only 1 0 Falling edge only 1 1 Rising and falling edge IS21 IS20 External Interrupt Sensitivity IPA bit =0 IPA bit =1 00 Falling edge & low level Rising edge & high level 0 1 Rising edge only Falling edge only 1 0 Falling edge only Rising edge only 1 1 Rising and falling edge IS21 IS20 External Interrupt Sensitivity 0 0 Falling edge & low level 0 1 Rising edge only 1 0 Falling edge only 1 1 Rising and falling edge |
|
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
