công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
LMX2326 bảng dữ liệu(PDF) 10 Page - National Semiconductor (TI) |
|
|
LMX2326 bảng dữ liệu(HTML) 10 Page - National Semiconductor (TI) |
10 / 19 page 1.0 Functional Description (Continued) 1.3.1 POWERDOWN OPERATION Bits F[2] and F[18] provide programmable powerdown modes when the CE pin is HIGH. When CE is LOW, the part is always im- mediately disabled regardless of powerdown bit status. Refer to Table 3. Synchronous and asynchronous powerdown modes are both available by MICROWIRE selection. Synchronous powerdown oc- curs if the F[18] bit (Powerdown Mode) is HIGH when F[2] bit (Powerdown) becomes HIGH. Asynchronous powerdown occurs if the F[18] bit is LOW when its F[2] bit becomes HIGH. In the synchronous powerdown mode (F[18] = HIGH), the powerdown function is gated by the charge pump to prevent unwanted frequency jumps. Once the powerdown program bit F[2] is loaded, the part will go into powerdown mode after the first successive charge pump event. In the asynchronous powerdown mode (F[18] = LOW), the device powers down immediately after latching LOW data into bit F[2]. The device returns to an actively powered up condition in either synchronous or asynchronous mode immediately upon LE latch- ing LOW data into bit F[2]. Activation of a powerdown condition in either synchronous or asynchronous mode including CE pin activated powerdown has the following effects: • Removes all active DC current paths. • Forces the R, N, and timeout counters to their load state conditions. • Will TRI-STATE the charge pump. • Resets the digital lock detect circuitry. • Debiases the f IN input to a high impedance state. • Disables the oscillator input buffer circuitry. • The MICROWIRE control register remains active and ca- pable of loading the data. TABLE 3. Power Down Truth Table CE(Pin 10) F[2] F[18] Mode LOW X X Asynchronous Power Down HIGH 0 X Normal Operation HIGH 1 0 Asynchronous Power Down HIGH 1 1 Synchronous Power Down TABLE 4. The Fo/LD (pin 14) Output Truth Table F[3] F[4] F[5] Fo/LD Output State 0 0 0 TRI-STATE 0 0 1 R Divider Output (fr) 0 1 0 N Divider Output (fp) 0 1 1 Serial Data Output 1 0 0 Digital Lock Detect (See 1.3.2 LOCK DETECT OUTPUT Section) 1 0 1 n Channel Open Drain Lock Detect (See 1.3.2 LOCK DETECT OUTPUT Section) 1 1 0 Active HIGH 1 1 1 Active LOW www.national.com 10 |
Số phần tương tự - LMX2326 |
|
Mô tả tương tự - LMX2326 |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất 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 |