CX28395 datasheet(21/305 Pages) CONEXANT

21 / 305 page

CX28394/28395/28398

1.0 Product Description

Quad/x16/Octal—T1/E1/J1 Framers

1.2 Pin Assignments

100054E

Conexant

1-3

1.2 Pin Assignments

The CX28394 is packaged in a 128-pin Quad Flat Pack (TQFP). The CX28395 is

packaged in a 318-pin Ball Grid Array (BGA) multi-chip module (MCM). The

CX28398 has two package alternatives: a 208-pin Quad Flat Pack (MQFP) and a

272-pin BGA. Pinout diagrams are provided in Figures 1-2 through 1-6 and

Tables 1-1 through 1-4 summarize pin assignments for system bus pins. Table 1-5

lists all other pin assignments.

Figures 1-7 through 1-12 illustrate the devices’ logic, and Table 1-6 defines

the hardware signals.

The following input pins contain an internal pullup resistor (>50 k

Ω) and may

remain unconnected if the active high input state is desired:

A[7:0]

Address lines unused in INTEL bus mode.

MOTO*

Pullup selects INTEL bus mode if unconnected.

SYNCMD

Pullup selects synchronous processor interface.

TDI (CX28394/28398)

JTAG unused if not connected.

TDI1, TDI2 (CX28395)

JTAG unused if not connected.

TMS

JTAG unused if not connected.

TCK

Disables JTAG if not connected.

TRST*

Disables JTAG reset if not connected.

RST*

Disables hardware reset if not connected.

SERDI

May be left unconnected if not used.

CX28395 Datasheet(PDF) 21 Page - Synaptics Incorporated.