 |
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 |
|
ST7LITE20 数据表(PDF) 67 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
ST7LITE20 数据表(HTML) 67 Page - STMicroelectronics |
|
|
67 / 131 page  ST7LITE2 67/131 LITE TIMER (Cont’d) – The opcode for the HALT instruction is 0x8E. To avoid an unexpected HALT instruction due to a program counter failure, it is advised to clear all occurrences of the data value 0x8E from memo- ry. For example, avoid defining a constant in ROM with the value 0x8E. – As the HALT instruction clears the I bit in the CC register to allow interrupts, the user may choose to clear all pending interrupt bits before execut- ing the HALT instruction. This avoids entering other peripheral interrupt routines after executing the external interrupt routine corresponding to the wake-up event (reset or external interrupt). 11.3.4 Low Power Modes 11.3.5 Interrupts Note: The TBxF and ICF interrupt events are con- nected to separate interrupt vectors (see Inter- rupts chapter). They generate an interrupt if the enable bit is set in the LTCSR1 or LTCSR2 register and the interrupt mask in the CC register is reset (RIM instruction). 11.3.6 Register Description LITE TIMER CONTROL/STATUS REGISTER 2 (LTCSR2) Read / Write Reset Value: 0x00 0000 (x0h) Bits 7:2 = Reserved, must be kept cleared. Bit 1 = TB2IE Timebase 2 Interrupt enable. This bit is set and cleared by software. 0: Timebase (TB2) interrupt disabled 1: Timebase (TB2) interrupt enabled Bit 0 = TB2F Timebase 2 Interrupt Flag. This bit is set by hardware and cleared by software reading the LTCSR register. Writing to this bit has no effect. 0: No Counter 2 overflow 1: A Counter 2 overflow has occurred LITE TIMER AUTORELOAD REGISTER (LTARR) Read / Write Reset Value: 0000 0000 (00h) Bits 7:0 = AR[7:0] Counter 2 Reload Value. These bits register is read/write by software. The LTARR value is automatically loaded into Counter 2 (LTCNTR) when an overflow occurs. Mode Description SLOW No effect on Lite timer (this peripheral is driven directly by fOSC/32) WAIT No effect on Lite timer ACTIVE-HALT No effect on Lite timer HALT Lite timer stops counting Interrupt Event Event Flag Enable Control Bit Exit from Wait Exit from Active Halt Exit from Halt Timebase 1 Event TB1F TB1IE Yes Yes No Timebase 2 Event TB2F TB2IE Yes No No IC Event ICF ICIE Yes No No 70 000000 TB2IE TB2F 70 AR7 AR7 AR7 AR7 AR3 AR2 AR1 AR0 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
