DS3181 Maxim Integrated Products, DS3181 Datasheet - Page 159

• Manufacturer Part Number: DS3181
• Description: Network Controller & Processor ICs DS3-E3 ATM-Packet PH Y with Built-in Line
• Manufacturer: Maxim Integrated Products

Specifications of DS3181

• Product: Framer
• Number Of Transceivers: 1
• Data Rate: 44.736 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 280 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: TEBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS3181/DS3182/DS3183/DS3184
not match its expected value (up to 1 per sub-frame). The detection of POI byte (P#) framing errors is
programmable (on or off).
BIP-8 errors are determined by calculating the BIP-8 of the current frame (path overhead and cell bytes), and
comparing the calculated BIP-8 to the B1 byte in the next frame. The type of BIP-8 errors accumulated is
programmable (bit or block). A bit error increments the count once for each bit in the B1 byte that does not match
the corresponding bit in the calculated BIP-8 (up to 8 per frame). A block error increments the count if any bit in the
B1 byte does not match the corresponding bit in the calculated BIP-8 (up to 1 per frame).
REI errors are determined by the four REI bits (first four bits of G1). The count is incremented by the value of the
four REI bits (up to 8 per frame). Values of 9h - Fh are treated as zero errors.
10.8.8.4 Receive E3 PLCP Overhead Extraction
Overhead extraction extracts all of the E3 PLCP path overhead bytes from the E3 PLCP frame. All of the PLCP
path overhead (POH) bytes (Z3 – Z1, F1, B1, G1, M1, M2, and C1) are output on the receive overhead bus
(RPOHCLK, RPOH, and RPOHSOF). The B1 byte is output as an error indication (modulo 2 addition of the
calculated BIP-8 and the B1 byte). In addition, the Z3 – Z1, F1, G1 (6:8), M1, and M2 bytes are integrated and
stored in registers along with change indications. G1 (6:8) has an unstable indication as well. The F1 byte is sent to
the receive trail trace buffer, and can also be sent to the receive HDLC controller. The M2 byte and/or M1 byte can
be sent to the receive HDLC controller. The source of the data transferred to the receive HDLC controller is
programmable (F1, M2, M1, or M2 & M1). If both the M2 and M1 bytes are programmed to be the source for the
receive HDLC controller, they are concatenated as a single data link as opposed to two separate data links.
Once all frame processing has been completed, the ATM cells are passed on to the ATM/Packet Processor with a
start of cell indication.
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