COM20022I-HT Standard Microsystems (SMSC), COM20022I-HT Datasheet - Page 77

• Manufacturer Part Number: COM20022I-HT
• Manufacturer: Standard Microsystems (SMSC)

Specifications of COM20022I-HT

• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Compliant

10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Chip RAM
Datasheet
4.
5.
SMSC COM20022I
“Write” means write signal and “Read” means read signal. “Write/Read” means write or read signal.
At INTEL MODE, write signal is nWR and read signal is nRD.
At MOTOROLA MODE, write signal is nDS when DIR is Low and the read signal is nDS when DIR is High.
Conditions of CASE1W, CASE2W, CASE1R and CASE2R are shown below;
CASE1W : BUSTMG pin = High
CASE2W : BUSTMG pin = Low
CASE1R : BUSTMG pin = High and RBUSTMG bit = 0
CASE2R : BUSTMG pin = Low or RBUSTMG bit = 1
DATASHEET
Page 77
Revision 09-27-07