PM7346 datasheet(52/419 Pages) PMC

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PM7346 S/UNI-QJET

DATASHEET

PMC-960835

ISSUE 6

SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3

PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 31

Pin Name

Type

Pin No.

Function

TFPO[4]

TFPO[3]

TFPO[2]

TFPO[1]

TMFPO[4]

TMFPO[3]

TMFPO[2]

TMFPO[1]

Output

W14

Y10

Framer Transmit Frame Pulse/Multi-frame

Pulse Reference (TFPO/TMFPO[4:1]).

TFPO/TMFPO[4:1] is valid when the

S/UNI-QJET is configured as a DS3, E3,

or J2 framer for non-ATM applications by

setting the FRMRONLY bit in the

S/UNI-QJET Configuration 1 Registers to

logic 1 and the TXGAPEN bit in the

S/UNI-QJET Configuration Registers to

logic 0.

TFPO[4:1] pulses high for 1 out of every

85 clock cycles when configured for DS3,

giving a free-running mark for all overhead

bits in the frame. TFPO[4:1] pulses high

for 1 out of every 1536 clock cycles when

configured for G.751 E3, giving a free-

running reference G.751 indication.

TFPO[4:1] pulses high for 1 out of every

4296 clock cycles when configured for

G.832 E3, giving a free-running reference

G.832 frame indication. TFPO[4:1] pulses

high for 1 out of every 789 clock cycles

when configured for J2, giving a free-

running reference frame indication.

TMFPO[4:1] pulses high for 1 out of every

4760 clock cycles when configured for

DS3, giving a free-running reference M-

frame indication. TMFPO[4:1] pulses high

for 1 out of every 3156 clock cycles when

configured for J2, giving a free-running

reference multi-frame indication.

TMFPO[4:1] behaves the same as

TFPO[4:1] for E3 applications.

TFPO/TMFPO[4:1] is updated on the

rising edge of TICLK[4:1] or RCLK[4:1] if

loop-timed.

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