CD2231

Manufacturer Part NumberCD2231
DescriptionCD2231 Intelligent Two-channel Lan And Wan Communications Controller
ManufacturerIntel Corporation
CD2231 datasheet
 


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CD2231 — Intelligent Two-Channel LAN and WAN Communications Controller
7.0
Programming Examples
This section provides some examples of the CD2231 programming. Included are examples of
global and per-channel initialization, and two interrupt service routines. The code is written in
Borland Turbo C .
Figure 20. Initialization Sequence for the CD2231
‘RESET ALL’
A host command
Do not issue a
‘RESET ALL' command
immediately after power up
(CAR–CCR)
Single channel
reconfiguration
84
Power Up
Command
(any CCR)
Wait for GFRCR
to be non-zero
Set up Global registers:
TPR and PILR1–3,
Disable
RX, TX
First set up CAR
channel-specific register
Set up channel-specific
registers in any order:
CMR, COR1–5, TBPR, TCOR,
RBPR, RCOR, CPSR, LIVR,
GT1–2, RFAR1–4 (sync),
SCHR1–4, SCR, RTPR (async)
Last step in channel
configuration:
CCR, IER
A channel is
configured
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