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TNETA1575 数据表(PDF) 9 Page - Texas Instruments

部件名 TNETA1575
功能描述  ATM SEGMENTATION AND REASSEMBLY DEVICE WITH PCI-HOST AND COPROCESSOR INTERFACES
PDF  45 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

TNETA1575 数据表(HTML) 9 Page - Texas Instruments

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TNETA1575
ATM SEGMENTATION AND REASSEMBLY DEVICE
WITH PCI-HOST AND COPROCESSOR INTERFACES
SDNS040C – MAY 1996 – REVISED JUNE 1998
9
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
Terminal Functions (Continued)
miscellaneous signals
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
ATM clock1
PHY mode
ATMCLK1 is driven low and can be left as a no connection (NC).
ATMCLK1
82
O
(CMOS)
ATM mode
The ATMCLK1 is used as the clock source to provide for data transfers/
synchronization across the transmit UTOPIA interface between the SAR and
external devices not connected to the PCI-host interface. The ATMCLK1 is
connected to SEGCLK in the ATM mode. If the TNETA1585 is not used, the
ATMCLK1 also can be used as the clock source for the receive UTOPIA interface.
The clock generated by the interface is 33 MHz (nominal), using the PCI clock.
ATMCLK2
64
O
(CMOS)
ATM clock2. ATMCLK2 is an auxiliary ATM clock that is used as the clock source to the
TNETA1585 or a similar-type device. When the TNETA1585 is used, ATMCLK2 is also connected
to the RESCLK input. The clock generated by the interface is 33 MHz (nominal), using the PCI
clock.
PHY/ATM
83
I
(TTL)
PHY/ATM mode select. PHY/ATM selects ATM mode when low and the PHY mode when high.
power and ground
TERMINAL
DESCRIPTION
NAME
NO.
DESCRIPTION
GND
8, 15, 24, 32, 40, 47, 56, 76, 88, 107, 117, 122,
128, 135, 140, 146, 151, 157, 163, 168, 174, 180,
186, 192, 198, 203, 210, 216, 223, 228, 234, 239
Ground. GND is the 0-V reference for the device.
VCC
6, 17, 38, 49, 60, 65, 93, 115, 132, 143, 161, 170,
178, 188, 196, 205, 221, 230
Supply voltage. VCC is the 3.3-V supply for the digital logic.
VCC(5V)
28, 68, 100, 125, 153, 182, 213, 235
Supply voltage. VCC(5V) is the 5-V supply for the clamp diodes used
with the 5-V tolerant input and output buffers for protection.



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