Advanced Web Communication
(10)
Slim-Link® Server
Slim-Link® Server Local Area Network Connection
The Slim-Link® Server integrates a 10Base-T connection.
An AMD AM79C961A Ethernet Controller is linked to
the AMD186 main controller to handle the local area
network interface. The AM79C961 provides both the
Ethernet Control functions and 10Base-T transceiver
facilities.
The integrated AM79C961A supports an IEEE 802.3 or
ANSI 8802-3 compliant 10Base-T network connection.
The ethernet controller handles all data framing,
addressing and error detection tasks, and manages
collision handling and avoidance.
Slim-Link® Server Serial Ports
The Slim-Link® Server includes a pair of serial ports for
local communications. These ports come directly from
the AM186 controller. Serial Port B supports hardware
flow control lines as well as transmit and received data.
Serial Port A supports only transmit and received data.
Serial Port A
Serial Port A corresponds to Serial Port 1 of the AM186
micro-controller. Serial Port A includes only the TXD
(Transmit Data) and RXD (Received Data) signals.
These signals are active low.
Serial Port A does not support Hardware Flow Control.
In-band flow control should be used instead. When using
in-band flow control, predefined XON and XOFF
characters serve as flow control signals from the
controller and peripheral. The equipment places an
XOFF character in the data stream when it can no longer
accept data. An XON character is sent when data traffic
can again be accepted.
Serial Port A Signal
AM186 Signal
TXDA
PIO27
RXDA
PIO28
Serial Port B
Serial Port B corresponds to Serial Port 0 of the AM186
micro-controller. Serial Port B includes hardware flow
control lines RTS (Request to Send) and CTS (Clear to
Send) as well as TXD (Transmit Data) and RXD
(Received Data). All signals are active low.
The hardware flow control lines regulate the flow of data
between the Slim-Link® Server and its serial peripheral.
When both devices can receive data the RTS and CTS
lines remain active. The Slim-Link® Server should keep
RTS active as long as it can accept data from the
peripheral equipment. It should drop RTS to signal the
peripheral equipment that it cannot accept data on RXD.
The peripheral equipment will likewise manipulate CTS
to indicate when it is unable to accept data on TXD.
Serial Port B Signal
AM186 Signal
TXDB
PIO22
RXDB
PIO23
RTSB
PIO20
CTSB
PIO21
The AM79C961A operates in Bus Master mode
permitting it to directly address all memory locations. The
fixed Ethernet Physical address is stored in an on-board
EEPROM with other configuration data.
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