DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver

 

 

 

 

 

 

 

NAME

PIN

TYPE

FUNCTION

 

 

 

 

Receive Sync for the T1/E1/J1 Transceiver: An extracted pulse,

 

 

 

 

 

one RCLKO wide, is output at this pin, which identifies either frame

 

 

 

 

 

(TR.IOCR1.5 = 0) or multiframe (TR.IOCR1.5 = 1) boundaries. If

 

 

RSYNC

G4

I/O

set to output-frame boundaries then via TR.IOCR1.6, RSYNC can

 

 

also be set to output double-wide pulses on signaling frames in T1

 

 

 

 

 

 

 

 

 

 

mode. If the receive-side elastic store is enabled, then this pin can

 

 

 

 

 

be enabled to be an input via TR.IOCR1.4 at which a frame or

 

 

 

 

 

multiframe boundary pulse is applied.

 

 

 

 

 

Receive System Clock for the Transceiver: 1.544MHz,

 

 

RSYSCLK

F4

I

2.048MHz, 4.096MHz, or 8.192MHz clock. Only used when the

 

 

receive-side elastic-store function is enabled. Should be tied low in

 

 

 

 

 

 

 

 

 

 

applications that do not use the receive-side elastic store.

 

 

RFSYNC

A3

O

Receive Frame Sync (Pre Receive Elastic Store) for T1/E1/J1

 

 

Transceiver: An extracted 8kHz pulse, one RCLKO wide, is output

 

 

 

 

 

at this pin, which identifies frame boundaries.

 

 

 

 

 

Receive Multiframe Sync for the T1/E1/J1 Transceiver: An

 

 

RMSYNC

U3

O

extracted pulse, one RCLKO wide (elastic store disabled) or one

 

 

RSYSCLK wide (elastic store enabled), is output at this pin, which

 

 

 

 

 

 

 

 

 

 

identifies multiframe boundaries.

 

 

 

 

 

Receive Signaling Output: Outputs signaling bits in a PCM

 

 

RSIG

L3

O

format. Updated on rising edges of RCLKO when the receive-side

 

 

elastic store is disabled. Updated on the rising edges of RSYSCLK

 

 

 

 

 

 

 

 

 

 

when the receive-side elastic store is enabled.

 

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Page 33
Image 33
Maxim DS33R11 Receive System Clock for the Transceiver 1.544MHz, Receive Frame Sync Pre Receive Elastic Store for T1/E1/J1