MSC8103 datasheet(21/104 Pages) FREESCALE

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CPM Ports

MSC8103 Network Digital Signal Processor, Rev. 11

Freescale Semiconductor

1-17

PA27

FCC1: RXSOC

UTOPIA slave

FCC1: RX_DV

MII

Output

Input

FCC1: UTOPIA Receive Start of Cell

Asserted by the MSC8103 (UTOPIA slave) for an external PHY when

RXD[0–7] contains the first valid byte of the cell.

FCC1: Media Independent Interface Receive Data Valid

Asserted by an external fast Ethernet PHY to indicate that valid data is

being sent. The presence of carrier sense but not RX_DV indicates

reception of broken packet headers, probably due to bad wiring or a bad

circuit.

PA26

FCC1: RXCLAV

UTOPIA slave

FCC1: RXCLAV

UTOPIA master, or

RXCLAV0

UTOPIA master, Multi-PHY, direct

polling

FCC1: RX_ER

MII

Output

Input

FCC1: UTOPIA Slave Receive Cell Available

Asserted by the MSC8103 (UTOPIA slave PHY) when one complete

ATM cell is available for transfer.

FCC1: UTOPIA Master Receive Cell Available

Asserted by an external PHY when one complete ATM cell is available

for transfer.

FCC1: UTOPIA Master Receive Cell Available 0 Direct Polling

Asserted by an external PHY when one complete ATM cell is available

for transfer.

FCC1: Media Independent Interface Receive Error

Asserted by an external fast Ethernet PHY to indicate a receive error,

which often indicates bad wiring.

PA25

FCC1: TXD0

UTOPIA

SDMA: MSNUM0

Output

FCC1: UTOPIA Transmit Data Bit 0

The MSC8103 outputs ATM cell octets (UTOPIA interface data) on

TXD[0–7]. TXD0 is the least significant bit. When no ATM data is

available, idle cells are inserted. A cell is 53 bytes.

Module Serial Number Bit 0

The MSNUM has 6 bits that identify devices using the serial DMA

(SDMA) modules. MSNUM[0–4] is the sub-block code of the current

peripheral controller using SDMA. MSNUM5 indicates the section,

transmit (0) or receive (1), that is active during the transfer. The

information is recorded in the SDMA transfer error registers.

PA24

FCC1: TXD1

UTOPIA

SDMA: MSNUM1

Output

FCC1: UTOPIA Transmit Data Bit 1

The MSC8103 outputs ATM cell octets (UTOPIA interface data) on

TXD[0–7]. This is bit 1 of the transmit data. TXD7 is the most significant

bit. When no ATM data is available, idle cells are inserted. A cell is 53

bytes.

Module Serial Number Bit 1

The MSNUM has 6 bits that identify devices using the serial DMA

(SDMA) modules. MSNUM[0–4] is the sub-block code of the current

peripheral controller using SDMA. MSNUM5 indicates the section,

transmit (0) or receive (1), that is active during the transfer. The

information is recorded in the SDMA transfer error registers.

PA23

FCC1: TXD2

UTOPIA

Output

FCC1: UTOPIA Transmit Data Bit 2

The MSC8103 outputs ATM cell octets (UTOPIA interface data) on

TXD[0–7]. This is bit 2 of the transmit data. TXD7 is the most significant

bit. When no ATM data is available, idle cells are inserted. A cell is 53

bytes.

Table 1-7.

Port A Signals (Continued)

Name

Dedicated

I/O Data

Direction

Description

General-

Purpose I/O

Peripheral Controller:

Dedicated Signal

Protocol

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