COM20022I3V-HD SMSC, COM20022I3V-HD Datasheet - Page 22

• Manufacturer Part Number: COM20022I3V-HD
• Description: Network Controller & Processor ICs ARCNET Contrllr
• Manufacturer: SMSC

Specifications of COM20022I3V-HD

• Data Rate: 10 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Revision 02-27-06
(Active-High)
(Active-Low)
nDACK
The timing of the Non-Burst mode DMA data transfer is found in the Timing Diagrams section of this data
sheet. The basic sequence of operation is as follows:
DREQ
nDACK becomes active (low) upon DREQ becoming active (high) and catching the host bus (AEN=1).
DREQ becomes inactive after nDACK and read/write signal become active.
DREQ becomes active after nDACK or read/write signal becomes inactive.
DREQ becomes inactive after TC and the read/write signal assert (when nDACK=0). In this case,
DREQ doesn't become active again after nDACK becomes inactive.
nDACK becomes inactive after DREQ=0 and the present cycle finishes.
Figure 5.4
- Programmable Burst Mode DMA Transfer (Rough Timing)
(Counting Read/Write pulse
or counting internal timer)
DATASHEET
Transfer term
Page 22
10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Board RAM
Gate
Time
SMSC COM20022I 3V
Transfer
Restart
Datasheet