89hpes16h16 Integrated Device Technology, 89hpes16h16 Datasheet - Page 9

• Manufacturer Part Number: 89hpes16h16
• Description: 16-lane, 16-port Pcie System Interconnect Switch
• Manufacturer: Integrated Device Technology

IDT 89HPES16H16 Data Sheet
JTAG_TRST_N
SWMODE[3:0]
JTAG_TDO
JTAG_TMS
JTAG_TCK
JTAG_TDI
V
RSTHALT
Signal
PERSTN
Signal
Signal
DD
V
V
DD
DD
CORE
I/O
PE
Type
Type
Type
O
I
I
I
I
I
I
I
I
I
I
Fundamental Reset. Assertion of this signal resets all logic inside the PES16H16 and
initiates a PCI Express fundamental reset.
Reset Halt. When this signal is asserted during a PCI Express fundamental reset, the
PES16H16 executes the reset procedure and remains in a reset state with the Master
and Slave SMBuses active. This allows software to read and write registers internal to
the device before normal device operation begins. The device exits the reset state
when the RSTHALT bit is cleared in the PA_SWCTL register by an SMBus master.
Switch Mode. These configuration pins determine the PES16H16 switch operating
mode.
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.
0x0 - Normal switch mode
0x1 - Normal switch mode with Serial EEPROM initialization
0x2 through 0x7 - Reserved
0x8 - Normal switch mode with upstream port failover (port 0 selected as the
0x9 - Normal switch mode with upstream port failover (port 2 selected as the
0xA - Normal switch mode with Serial EEPROM initialization and upstream port
0xB - Normal switch mode with Serial EEPROM initialization and upstream port
0xC through 0xF - Reserved
Table 5 System Pins (Part 2 of 2)
Table 7 Power and Ground Pins
upstream port)
upstream port)
failover (port 0 selected as the upstream port)
failover (port 2 selected as the upstream port)
Table 6 Test Pins
9 of 35
Name/Description
Name/Description
Name/Description
April 16, 2008