Datasheet

TUSB1310A
www.ti.com
SLLSE32E NOVEMBER 2010REVISED JULY 2012
2.4 Clocking
Table 2-5. Clock Signal Name Description
SIGNAL NAME TYPE BALL NO. DESCRIPTION
Crystal Input. This pin is the clock reference input for the TUSB1310A. The
XI I A12 TUSB1310A supports either a crystal unit, or a 1.8-V clock input. Frequencies
supported are 20, 25, 30, or 40 MHz.
XO O A11 Crystal output. If a 1.8-V clock input is connected to XI, XO must be left open.
CLKOUT O D10 OOBCLK is driven in U3 mode.
2.5 JTAG Interface
The JTAG Interface is used for board-level boundary scan. All digital IO support IEEE1149.1 boundary
scan and SuperSpeed differential pairs support IEEE1149.6 boundary scan.
Table 2-6. JTAG Signal Name Description
SIGNAL NAME TYPE BALL NO. DESCRIPTION
JTAG_TCK I, PU G11 JTAG test clock
JTAG_TMS I, PU D11 JTAG test mode select
JTAG_TDI I, PU E11 JTAG test data input
JTAG test asynchronous reset. Active Low. An external pull-down is required for
JTAG_TRSTN I, PD E12
normal operation.
JTAG_TDO O F11 JTAG test data output
2.6 Reset and Output Control Interface
Table 2-7. Reset and Output Control Signal Description
SIGNAL NAME TYPE BALL NO. DESCRIPTION
RESETN I J11 Active Low. Resets the transmitter and receiver. This signal is asynchronous.
Active High. This can be connected to a 1.8-V power on reset signal on the PCB in
order to avoid static current and signal contention during power up.
OUT_ENABLE I L10 0: Disable all driver outputs while IO powers are supplied, but internal control circuit
powers are not present during power up.
1: Enable all driver outputs during normal operation.
2.7 Strap Options
Strapping pins are latched by reset de-assertion in the TUSB1310A.
Table 2-8. Strapping Options
SIGNAL NAME TYPE BALL NO. DESCRIPTION
Selects an input clock source
XTAL_DIS
S, I/O, PD F3 0 Crystal Input
(RX_ELECIDLE)
1 Clock Input
Spread spectrum clocking disable
SSC_DIS
S, I, PD M9 0 SSC enable
(TX_MARGIN0)
1 SSC disable
Selects PIPE
PIPE_16BIT
S, I/O, PD E3 0 16-bit PIPE SDR mode
(PHY_STATUS)
Must be 0 at reset.
Copyright © 2010–2012, Texas Instruments Incorporated PIN DESCRIPTIONS 13
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Product Folder Link(s): TUSB1310A