 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
PC8374L Datasheet(PDF) 118 Page - National Semiconductor (TI) |
|
|
|
|||||||||||||||||||||||||||||
PC8374L Datasheet(HTML) 118 Page - National Semiconductor (TI) |
|
|
118 / 239 page  www.national.com 118 Revision1.1 7.0 Glue Functions This chapter describes the glue functions integrated in the PC8374L device. 7.1 OVERVIEW This module contains the glue functions. Most of them operate independently of the other functions and of the other modules in the PC8374L device. The glue functions are divided into three groups: • Power-related functions: — Highest active Main supply reference (REF5V) — Highest active Standby supply reference (REF5V_STBY) — Resume reset (RSMRST) — Main power good (PWRGD_3V) — Power distribution control (BKFD_CUT, LATCHED_BF_CUT) — Main power supply control (PS_ON) • Miscellaneous functions: — Hard-disk LED indicator control (HD_LED) • SMBus support functions: — SMBus voltage translation (CC_DDCSCL, CC_DDCSDA, 5V_DDCSCL, 5V_DDCSDA) — SMBus isolation (SMB1_SCL, SMB1_SDA, SMB2_SCL, SMB2_SDA) Each function is described in the following sections. 7.2 FUNCTIONAL DESCRIPTION 7.2.1 Highest Active Main Supply Reference This function generates the REF5V analog output signal (see specification in Section 10.2.11 on page 216). When the Main power supply is turned on or off, the REF5V signal tracks either the VDD3 or VDD5 power supplies, whichever has a higher voltage. The circuit that generates the REF5V output is composed of two parts: ● One part tracks the V DD3 supply voltage and is implemented in the PC8374L device. ● One part tracks the V DD5 supply voltage and is implemented by an external resistor connected to the VDD5 power supply. Figure 19 shows a simplified diagram of the circuit that generates the REF5V analog output signal Figure 19. REF5 Generation (Simplified Diagram) VDD5 1 K Ω Pin VDD3 REF5V A B Comp S 0.1-1 µF PC8374L Winbond Electronics Corp. Advanced PC Product Center |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | 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
