Yamaha MCX-1000 Service Manual page 54

MCX-1000
IC501 : LAN91C111 (MAIN P.C.B.)
Ethernet
Pin No.
Name
TQFP
24,39,52, Ground
57,67,72,
93,103,
108,117
13,19 Analog Ground
21 Loopback
20 nLink Status
28 nControl
47 X25 Out
111 Transit
Enable 100 Mbps
119 Carrier Sense
100 Mbps
125 Receive Data
Valid
112 Collisio
Detect 100 Mbps
113-116 Transmit Data
109 Transmit Clock
118 Receive Clock
121-124 Receive Data
25 Management
Data Input
26 Management
Data Output
27 Management
Output
126 Receive Error
54
Buffer
Symbol
Type
GND Ground pin.
AGND Analog ground pin.
LBK O4 Output pin. It is effective when the LOOP bit is set (TCR bit 1).
nLNK I with Input signal. The general purpose port is used to transmit the LINK
pullup** status (EPHSR bit 14).
nCNTRL O12 General purpose control signal.
X25out O12 25MHz output signal to external PHY.
TXEN100 O12 Output signal to MII PHY. It enables 100Mbps transmission.
CRS100 I with Input signal from MII PHY. Wave form of bucket reception to be used
pulldown** when waiting for reception and restoring.
RX_DV I with Input signal from MII PHY. Wave form for receiving effective data,
pulldown** used to form reception data.
COL100 i with Input signal from MII PHY. This is an input pin for collision detection.
pulldown**
TXD0- O12 Output signal. 4 bit data is transmitted to MII PHY.
TXD3
TX25 I with Input signal. The clock input from MII is transmitted. 4 bit rate clock
pullup** (25 MHz for 100 Mbps and 2.5 Mbps for 10 Mbps)
RX25 I with Input signal. The clock input received from MII PHY. 4 bit rate clock
pullup** (25 MHz for 100 Mbps or 2.5 Mbps for 10 Mbps).
RXD0- I with Input signal. 4 bits of the receiving data from MII PHY.
RXD3 pullup**
MDI I with MII management data input signal.
pulldown**
MDO O4 MII management data output signal.
MCLK O4 MII management clock.
RX_ER I with For the input signal which indicates an error of the code detected by
pulldown** PHY. It is used to remove the bucket being received by LAN91C111.
The error reported by this event has the same meaning as a faulty
CRC. (Receive Status Word 13)
Function