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6.6 Direct Media Interface (DMI)
Table 29. Direct Media Interface (DMI) – Processor to PCH Serial Interface
Signal Name Description Direction / Buffer
Type
DMI_RXP[3:0]
DMI_RXN[3:0]
DMI Input from PCH: Direct Media Interface receive
differential pair.
I
DMI
DMI_TXP[3:0]
DMI_TXN[3:0]
DMI Output to PCH: Direct Media Interface transmit
differential pair.
O
DMI
6.7 Phase Locked Loop (PLL) Signals
Table 30. Phase Locked Loop (PLL) Signals
Signal Name Description Direction / Buffer
Type
BCLKP
BCLKN
Differential bus clock input to the processor I
Diff Clk
DPLL_REF_CLKP
DPLL_REF_CLKN
Embedded Display Port PLL Differential Clock In:
135 MHz
I
Diff Clk
SSC_DPLL_REF_CLKP
SSC_ DPLL_REF_CLKN
Spread Spectrum Embedded DisplayPort PLL
Differential Clock In: 135 MHz
I
Diff Clk
6.8 Testability Signals
Table 31. Testability Signals
Signal Name Description Direction / Buffer
Type
BPM#[7:0]
Breakpoint and Performance Monitor Signals:
Outputs from the processor that indicate the status of
breakpoints and programmable counters used for
monitoring processor performance.
I/O
CMOS
DBR#
Debug Reset: This signal is used only in systems where
no debug port is implemented on the system board.
DBR# is used by a debug port interposer so that an in-
target probe can drive system reset.
O
PRDY#
Processor Ready: This signal is a processor output
used by debug tools to determine processor debug
readiness.
O
Asynchronous CMOS
PREQ#
Processor Request: This signal is used by debug tools
to request debug operation of the processor.
I
Asynchronous CMOS
TCK
Test Clock: This signal provides the clock input for the
processor Test Bus (also known as the Test Access
Port). This signal must be driven low or allowed to float
during power on Reset.
I
GTL
TDI
Test Data In: This signal transfers serial test data into
the processor. This signal provides the serial input
needed for JTAG specification support.
I
GTL
continued...
Processor—Signal Description
Intel
®
Xeon
®
Processor E3-1200 v3 Product Family
Datasheet – Volume 1 of 2 June 2013
82 Order No.: 328907-001