MiTAC MiNote 7321, Service Manual

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7321 N/B Maintenance 7321 N/B Maintenance
5.3 VIA VT8231 BGA PCI-LPC/ISA South Bridge
General Purpose I/Os
Signal Name PIN # I/O Signal Description
GPIOA / GPI24 /
GPO24
Y2 IO / I / O General Purpose I/O A / 24. (F4 RxE6[0] defines as GPI
or GPO)
GPIOB / IRRX2 T8 IO / I General Purpose I/O B. (See FIR I/O Rx33 and 34)
GPIOC / GPI25 /
GPO25 / ATEST
/ CHSINOUT
J5 IO / I / O / O General Purpose I/O C / 25. (F4 RxE6[1] defines as GPI
or GPO)
GPIOD / GPI30 /
GPO30 / DTEST
Y1 IO / I / O / O General Purpose I/O D / 30. (F4 RxE6[6] defines as GPI
or GPO)
GPIOE / GPI31 /
GPO31
W3 IO General Purpose I/O E / 31. (F4 RxE6[7] defines as GPI
or GPO)
Hardware Monitoring
Signal Name PIN # I/O Signal Description
UIC1 M1 Analog I Universal Input Channel. For temperature / voltage
monitoring.
UIC2 M3 Analog I Universal Input Channel. For temperature / voltage
monitoring.
UIC3 M2 Analog I Universal Input Channel. For temperature / voltage
monitoring.
UIC4 L4 Analog I Universal Input Channel. For temperature / voltage
monitoring.
UIC5 L1 Analog I Universal Input Channel. For temperature / voltage
monitoring.
DTD+ L2 Analog I CPU DTD (Thermal Diode) Channel Plus.
DTD- L3 Analog I CPU DTD (Thermal Diode) Channel Minus.
VREF
K1 O
Voltage Reference for Thermal Sensing
(2.2V ?5%)
FAN1 K2 I Fan Speed Monitor 1. (3.3V only)
FAN2 / SLPBTN# /
GPI18 / GPO18
K3 I / I / I / O Fan Speed Monitor 2. (3.3V only) (F4 RxE5[0] = 0)
DTEST / GPIOD (30) Y1 O Hardware Monitor Digital Test Out
ATEST / GPIOC (25) /
CHSINOUT
J2 O Hardware Monitor Analog Test Out
Power Management and External State Monitoring
Signal Name PIN # I/O Signal Description
PME# / GPI6 U1 I / I Power Management Event. (Rx74[1]=0) (1K PU to
VCCS if not used)
EXTSMI# / GPI2 W1 IOD / I External System Management Interrupt. When enabled
to allow it, a falling edge on this input causes an SMI# to
be generated to the CPU to enter SMI mode. (10K PU to
VCCS if not used) (3.3V only)
SMBALRT#
/ GPI7 T2 I / I
SMB Alert
(System Management Bus I/O space Rx08[3]
= 1). When the chip is enabled to allow it, assertion
generates an IRQ or SMI or power management event.
(10K PU to VCCS if not used)
THRM / AOLGPI /
GPI17
P3 I / I / I Monitor Input - Thermal Alarm. (F4 Rx40[7]=0) (1K
PU to VCCS if not used)
LID / GPI4 V2 I / I Monitor Input - Notebook Computer Display Lid Open
/ Closed.
Used by the Power Management subsystem to
monitor the opening and closing of the display lid of
notebook computers. Can be used to detect either
low-to-high and/or high-to-low transitions to generate an
SMI#. The VT8231 performs a 200 usec debounce of this
input if Function 4 Rx40[5] is set to 1. (10K PU to VCCS
if not used)
RING# / GPI3 U3 I / I Monitor Input – Modem Ring. May be connected to
external modem circuitry to allow the system to be
re-activated by a received phone call. (10K PU to VCCS if
not used)
BATLOW# / GPI5 T3 I / I Monitor Input - Battery Low. (10K PU to VCCS if not
used)
CPUMISS / GPI16 V1 I / I Monitor Input - CPU Missing. Indicates whether the
CPU is plugged in correctly.
AOLGPI / GPI17 /
THRM
P3 I / I / I Monitor Input - Awake On LAN External Event. F4
Rx40[7]=1
INTRUDER# / GPI8 F3 I / I Monitor Input – Chassis Intrusion.
RSMRST# F2 I Resume Reset. Resets the internal logic connected to the
VCCS power plane and also resets portions of the internal
RTC logic.
SUSA# / GPO1 /
strap
P1 O / O / I Suspend Plane A Control (Function 4 Rx54[2]=0).
Asserted during power management POS, STR, and STD
suspend states. Used to control the primary power plane.
(10K PU to VCCS if not used)
5. Pin Descriptions of Major Components