PCI slot test points

mahmoud 2020-04-22 1 دقيقة قراءة

PCI slot test points

1, the physical map

The photo above PCI slot on the motherboard physical map on the left are two PCI slots, the middle is the longestPCI ExpressX16 slot

2, bus and PCI bus map test points and test point (front view)

PCI slot on the back of map

Description: The figure above shows the form dark PCI slot for a key test points, including 4 power supply, a clock, a reset, 8-signal test points

+12 V,-12V, +3.3 V, +5 V:The four power supply test points

RESET #: It is reset test point, the normal voltage 3.3V ~ 0V, low reset, high work, mostly from the South Bridge to provide 370 motherboard, 478 motherboards are mostly provided by the South Bridge through the gate.

CLK:It is time test points, frequency of 33MHZ, normal voltage 1.1V ~ 1.6V, provided by the clock chip.

8 Signal Test points:

FRAME #: Frame periodic signal

TRDY #: from the device is ready

IRDY #: master device is ready to

DEVSEL #: Device Select Signal

C / BE # (0), C / BE # (1), C / BE (2), C / BE (3), is a command / byte to allow the signal

Keywords:PCI slot test points