Acer AcerNote 970 Service Manual page 36

Table 1- 13 PMU Timers List
Item
Detective hardware
change
Modem/parallel/serial timer
Timer value
System activities
and timer retriggers
Detective hardware
change
Hard disk timer
Timer value
System activities
and timer retriggers
Detective hardware
change
FDD/CD-ROM timer
Timer value
1
This parameter is for both internal CD-ROM and external floppy.
The pin-77 of U24 M2090 (VS5_VDPD) is from L to H.
Modem/parallel port/COM1/COM2/SIR: 5min, 30min(if AC plugged-in)
System activities
−
Modem controller is in power saving mode. Parallel/serial port pins are in
standby mode, serial port clock is stopped (if COM1-4, are not defined as a
mouse in BIOS Setup), and parallel port and UART1 decode in the 87336 chip
is disabled.
Timer retriggers
−
Modem/parallel port/COM1/COM2/SIR activities
Modem: The pin-6 of U3 R6693 (MODVCC) is from H to L.
COM1: The pin-25 of U48 MAX211 (SM5_SPPD) is from H to L.
COM2/SIR: The pin-1 of Q5 TP0101T (SM5_IRDAPD) is from L to H.
First phase heuristic time-out table for entering HDD standby mode: 9sec, 9sec,
20sec, 30sec, 40sec, 50sec, 60sec, 70sec, 80sec, 90sec, 2min, 3min, 4min, 5min,
30min(if AC plugged-in)
Second phase fixed timer for entering HDD suspend mode: 9sec
System activities
−
First phase time-out (heuristic) results in hard disk spin down and IDE
interface disable. The second time-out (9 sec) results in hard disk power off
and IDE controller clock is stopped and its internal HDD buffer disabled.
Timer retriggers
−
The I/O access to 1F0-7, 3F6 will retrigger the timer.
1. The pin-89 (CK3_IDECLK) of PCI0643 is tri-stated, IDE controller clock is
stopped.
2. The KB5_HDDBEN# signal on pin-1, 13, 37, 25 of 32XL384(U12, IDE
interface buffer), and pin-1 of S3384 (U22, IDE interface buffer) are from L to
H. HDD buffer is disabled.
3. The pin-41, 42 of CN5 HDD connector (HDDVCC) is from H to L, HDD is
powered off.
The system with internal floppy: 5sec
The system with internal CD-ROM
Descriptions
1
: 60sec, 30min(if AC plugged-in)