GX3202 Datasheet, PDF (6/49 Pages) Semtech Corporation – Crosspoint Switch with Trace Equalization and Output De-emphasis

1.2 Ball Descriptions
Table 1-1 shows the descriptions for selected GX3202 balls. For a comprehensive list of
balls from the GX3202 Crosspoint family, please refer to GX3290 (and family) Crosspoint
Ball Guide.
Table 1-1: Ball Descriptions
Ball #
Ball Name
Serial Interface I/O
AN16
AN17
AN18
AN19
SCLK
SDIN
SDOUT
S_CS
Parallel Interface I/O
AL23
P_CS
AL24
P_R/W
AL25
P_ADS
AM27 - AM16
AN35 - AN20
P_ADD[11:0]
P_DAT[15:0]
General I/O
AN15
HOST_S/P
AM35 - AM28
AR33
AR35
UPDATE_EN
[7:0]
POR_DFT
RESET
Test Interface
AL17
AL18
AL19
AL20
TCK
TMS
TDO
TDI
I/O Description
I
Serial Host Interface Clock. If unused, tie to ground.
I
Serial Host Interface Data Input. If unused, tie to ground.
O
Serial Host Interface Data Output. Leave NC if not used.
I
Serial Host Interface Chip Select. Active-LOW. Must be tied LOW when HOST_S/P is
set LOW.
I
Parallel host interface chip select. Active-LOW. Must be tied LOW when HOST_S/P is
set HIGH.
I
Selects between read and write operations on the parallel host interface.
HIGH = Read, LOW = Write. If unused, tie to ground.
I
Address and Data Strobe. Strobe signal for latching the address and data into the
chip. See Section 4.12.1 for timing information. If unused, tie to ground.
I
Address bus for the parallel interface. If unused, tie to ground.
I/O Bi-directional data bus for the parallel interface. If P_CS is HIGH, these pins are
configured as inputs. Leave NC if parallel interface is not used. If unused, tie to
ground.
I
Host Interface Select pin. Selects between serial and parallel host interfaces. Serial
host interface is enabled when HIGH, parallel host interface is enabled when LOW.
Must assert RESET after changing this pin.
I
Update Strobes used to update the switch matrix configuration (see Section 4.5). If
unused, weak pull-down to ground.
I
This pin disables the Power On Reset circuitry when HIGH. Weak internal pull-down.
Leave NC if not used.
I
Active-LOW reset for entire chip (see Section 4.11 for timing details). Weak internal
pull-up. Leave NC if not used.
I
JTAG test clock. Weak pull-up if not used.
I
JTAG test mode start. Weak pull-up if not used.
O
JTAG test data out. Leave NC if not used.
I
JTAG test data in. Weak pull-up if not used.
GX3202 202 x 202 3.5Gb/s Crosspoint
Data Sheet
56077 - 1
October 2012
6 of 49
Proprietary & Confidential