89hpes32h8 Integrated Device Technology, 89hpes32h8 Datasheet - Page 9

• Manufacturer Part Number: 89hpes32h8
• Description: 32-lane, 8-port Pcie System Interconnect Switch
• Manufacturer: Integrated Device Technology

IDT 89HPES32H8 Data Sheet
JTAG_TRST_N
JTAG_TDO
JTAG_TMS
JTAG_TCK
JTAG_TDI
Signal
V
Signal
V
DD
V
V
V
DD
DD
V
TT
DD
CORE
SS
APE
PE
PE
IO
Type
O
I
I
I
I
Type
I
I
I
I
I
JTAG Clock. This is an input test clock used to clock the shifting of data into or out of
the boundary scan logic or JTAG Controller. JTAG_TCK is independent of the system
clock with a nominal 50% duty cycle.
JTAG Data Input. This is the serial data input to the boundary scan logic or JTAG
Controller.
JTAG Data Output. This is the serial data shifted out from the boundary scan logic or
JTAG Controller. When no data is being shifted out, this signal is tri-stated.
JTAG Mode. The value on this signal controls the test mode select of the boundary
scan logic or JTAG Controller.
JTAG Reset. This active low signal asynchronously resets the boundary scan logic
and JTAG TAP Controller. An external pull-up on the board is recommended to meet
the JTAG specification in cases where the tester can access this signal. However, for
systems running in functional mode, one of the following should occur:
1) actively drive this signal low with control logic
2) statically drive this signal low with an external pull-down on the board
Core VDD. Power supply for core logic.
I/O VDD. LVTTL I/O buffer power supply.
PCI Express Digital Power. PCI Express digital power used by the digital
power of the SerDes.
PCI Express Analog Power. PCI Express analog power used by the PLL
and bias generator.
Ground.
PCI Express Serial Data Transmit Termination Voltage. This pin allows
the driver termination voltage to be set, enabling the system designer to
control the Common Mode Voltage and output voltage swing of the corre-
sponding PCI Serial Data Transmit differential pair.
Table 7 Power and Ground Pins
Table 6 Test Pins
9 of 40
Name/Description
Name/Description
April 16, 2008