FW82801EB Intel, FW82801EB Datasheet - Page 62

• Manufacturer Part Number: FW82801EB
• Manufacturer: Intel

Specifications of FW82801EB

• Lead Free Status / RoHS Status: Not Compliant

Signal Description
2.15
2.16
2.17
62
Table 17. Real Time Clock Interface
Table 18. Other Clocks
Table 19. Miscellaneous Signals
Real Time Clock Interface
Other Clocks
Miscellaneous Signals
CLK100P
CLK100N
INTVRMEN
RTCRST#
RTCX1
RTCX2
CLK14
CLK48
CLK66
Name
Name
Name
SPKR
TP0
TP1
TP2
Type
Special
Special
Type
Type
I
I
I
I
O
O
O
I
I
I
Oscillator Clock: Used for 8254 timers. Runs at 14.31818 MHz. This clock is
permitted to stop during S3 (or lower) states.
48 MHz Clock: Used to run the USB controller. Runs at 48 MHz. This clock is
permitted to stop during S3 (or lower) states.
66 MHz Clock: Used to run the hub interface. Runs at 66 MHz. This clock is
permitted to stop during S3 (or lower) states.
100 MHz Differential Clock: These signals are used to run the SATA controller.
The clock runs at 100 MHz. This clock is permitted to stop during S3 (or lower)
states.
Internal Voltage Regulator Enable: This signal enables the internal 1.5 V
Suspend regulator. It connects to VccRTC.
Speaker: The SPKR signal is the output of counter 2 and is internally “ANDed”
with Port 61h bit 1 to provide Speaker Data Enable. This signal drives an external
speaker driver device, which in turn drives the system speaker. Upon PCIRST#,
its output state is 0.
NOTE: SPKR is sampled at the rising edge of PWROK as a functional strap. See
RTC Reset: When asserted, this signal resets register bits in the RTC well.
NOTES:
Test Point 0: This signal must have an external pull-up to VccSus3_3.
Test Point 1: This signal is not implemented and should be routed to a test point.
Test Point 2: This signal is not implemented and should be routed to a test point.
1. Unless entering the XOR Chain Test Mode, the RTCRST# input must always
2. In the case where the RTC battery is not functional or missing on the platform,
Crystal Input 1: This signal is connected to the 32.768 kHz crystal. If no external
crystal is used, then RTCX1 can be driven with the desired clock rate.
Crystal Input 2: This signal is connected to the 32.768 kHz crystal. If no external
crystal is used, then RTCX2 should be left floating.
be high when all other RTC power planes are on
the RTCRST# pin must rise before the RSMRST# pin.
Section 2.21.1
resistor on SPKR pin.
for more details. There is a weak integrated pull-down
Intel
®
82801EB ICH5 / 82801ER ICH5R Datasheet
Description
Description
Description