 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
WM9711 Datasheet(PDF) 37 Page - Wolfson Microelectronics plc |
|
|
|||||||||||||||||||||||||||||
WM9711 Datasheet(HTML) 37 Page - Wolfson Microelectronics plc |
|
|
37 / 66 page  Production Data WM9711L w PD Rev 4.1 April 2004 37 BATTERY ALARM PRINCIPLE OF OPERATION The WM9711L has two on-chip comparators that can be used to implement a battery alarm function, or other functions such as a window comparator. Each comparator has one of its inputs tied to any one of three device pins and the other tied to a voltage reference. The voltage reference can be either internally generated (VREF = AVDD/2) or externally connected on CREF (pin 12). The comparator output signals are passed to the GPIO logic block (see “GPIO and Interrupt Control” section), where they can be used to send an interrupt to the CPU via the AC-Link or via the IRQ pin, and / or to wake up the WM9711L from sleep mode. COMP1 (pin 29) corresponds to GPIO bit 15 and COMP2 (pin30) to bit 14. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 15 CP1 1 COMP1 Polarity (see also “GPIO and Interrupt Control”) 0: Alarm when COMP1 voltage is above VREF 1: Alarm when COMP1 voltage is below VREF 4Eh 14 CP2 1 COMP2 Polarity (see also “GPIO and Interrupt Control”) 0: Alarm when COMP2 voltage is above VREF 1: Alarm when COMP2 voltage is below VREF 58h 15:13 COMP2 DEL 0 Low Battery Alarm Delay 000: No delay 001: 0.17s (2 13 = 8192 AC-Link frames) 010: 0.34s (2 14 = 16384 AC-Link frames) 011: 0.68s (2 15 = 32768 AC-Link frames) 100: 1.4s (2 16 = 65536 AC-Link frames) 101: 2.7s (2 17 = 131072 AC-Link frames) 110: 5.5s (2 18 = 262144 AC-Link frames) 111: 10.9s (2 19 = 524288 AC-Link frames) Table 25 Comparator Control REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION Comparator 1 Reference Voltage 0 VREF = AVDD/2 14 C1REF 0 1 WIPER/AUX4 (pin 12) Comparator 1 Signal Source 00 AVDD/2 when C1REF=’1’. Otherwise comparator 1 is powered down 01 COMP1/AUX1 (pin 29) 10 COMP2/AUX2 (pin 30) 13:12 C1SRC 00 11 BMON/AUX3 (pin 31) Comparator 2 Reference Voltage 0 VREF = AVDD/2 11 C2REF 0 1 WIPER/AUX4 (pin 12) Comparator 2 Signal Source 00 AVDD/2 when C2REF=’1’. Otherwise comparator 2 is powered down 01 COMP1/AUX1 (pin 29) 10 COMP2/AUX2 (pin 30) 5Ch Additional Analogue Functions 10:9 C2SRC 00 11 BMON/AUX3 (pin 31) Table 26 Comparator Reference and Source Control |
Similar Part No. - WM9711 |
|
Similar Description - WM9711 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
