 |
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 |
|
HC705JJ7GRS/D 数据表(PDF) 162 Page - NXP Semiconductors |
|
|
|||||||||||||||||||||||||||||
HC705JJ7GRS/D 数据表(HTML) 162 Page - NXP Semiconductors |
|
|
162 / 230 page  Programmable Timer General Release Specification MC68HC705JJ7/MC68HC705JP7 — Rev. 3.0 Programmable Timer 11.5 Input Capture Registers (ICRH and ICRL) The input capture function is a means to record the time at which an event occurs. The source of the event can be the change on an external pin (PB3/AN3/TCAP) or the CPF2 flag bit of voltage comparator 2 in the analog subsystem. The ICEN bit in the analog subsystem control register (ACR) at $001D selects which source is the input signal. When the input capture circuitry detects an active edge on the selected source, it latches the contents of the free-running timer counter registers into the input capture registers as shown in Figure 11-6. NOTE: Both the ICEN bit in the ACR and the IEDG bit in the TCR must be set when using voltage comparator 2 to trigger the input capture function Latching values into the input capture registers at successive edges of the same polarity measures the period of the selected input signal. Latching the counter values at successive edges of opposite polarity measures the pulse width of the signal. Figure 11-6. Timer Input Capture Block Diagram ICRH ($0014) 16-BIT COUNTER ÷ 4 INTERNAL (OSC ÷ 2) TIMER CONTROL REG. TIMER REQUEST INPUT CAPTURE (ICF) RESET CLOCK INTERRUPT ICRL ($0015) TIMER STATUS REG. $0012 $0013 INTERNAL DATA READ ICRH READ ICRL LATCH BUS EDGE SELECT & DETECT LOGIC PB3 AN3 TCAP INPUT SELECT MUX CPF2 FLAG ICEN CONTROL BIT BIT FROM ANALOG SUBSYSTEM INTERNAL DATA BUS Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
|
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
