The QuadFALC T1/E1/J1 Framer

Table 1-25. FLASH EEPROM Mapping (cont)
FLASH Addr 1st MAP

2nd MAP

Size

Description

￿￿￿9DOXHV￿GHSHQG￿RQ￿%RRW￿)LUPZDUH￿VL]H￿ZKLFK￿YDU\￿IURP￿RQH￿YHUVLRQ￿WR￿DQRWKHU￿±￿XVH￿WKH￿021,725￿,1)2￿ FRPPDQG￿WR￿GLVSOD\￿WKH￿DFWXDO￿VL]H￿

The FLASH device is normally controlled by the PowerQUICC II memory controller unit using chip-select signal CS0. The PowerQUICC II can read and re-program the FLASH using the AMD algorithms.

The FLASH device is not intended to be accessed through the CompactPCI bus. Because the FLASH device has an 8-bit data bus, and the PowerSpan supports only 64-bit wide devices, its byte lane can only be accessed by the CompactPCI host for addresses that are multiples of 8.

For more information, see Access to the FLASH EEPROM Through CompactPCI on page 24.

The QuadFALC T1/E1/J1 Framer

The 4538 Communication Controller includes one QuadFALC device which controls four independent T1/E1/J1 interfaces. For each interface, the QuadFALC includes a framer and an LIU with data and clock recovery, a frame aligner with two frame elastic buffers for receive clock wander and jitter compensation, a signaling controller with a HDLC controller and 64 bytes deep FIFOs, and an 8-bit micro-processor interface.

Each line can be independently configured for E1 or T1. The pulse shape for CEPT E1 applications is programmed according to ITU-T G.703:

Data Coding: HDB3

Voltage of nominal pulse: 3 V (CCITT G703)

Return Loss Transmitter: –12 dB (CCITT G703)

Line Impedance: 120 Ohm

The pulse shape for T1 applications is programmed according to ANSI T1.403:

Data Coding: B8ZS

Voltage of nominal pulse: 3 V

Return Loss Transmitter: –3.5 dB

Line Impedance: 100 Ohm

The pulse shape for J1 applications is programmed according to ITU-T JT G.703:

Data Coding: B8ZS

Voltage of nominal pulse: 3 V (TBV)

Return Loss Transmitter: –3.5 dB (TBV)

Line Impedance: 110 Ohm

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Interphase Corporation