CS8900-CQ3 Cirrus Logic, CS8900-CQ3 Datasheet - Page 109

• Manufacturer Part Number: CS8900-CQ3
• Description: Crystal LAN ISA Ethernet Controller
• Manufacturer: Cirrus Logic

DS271PP3
CS8900A
Crystal LAN™ ISA Ethernet Controller
AEN switches high
Figure 32. Boundary Scan Continuity Cycle
CIRRUS LOGIC PRODUCT DATA SHEET
and AEN becomes shift clock
output pins and bi-directional
ENTER BOUNDARY SCAN:
CS8900A resets, all digital
EXIT BOUNDARY SCAN:
All digital output pins and
bi-directional pins enters
Not in Boundary Scan
pins enter High-Z state,
AEN becomes ISA bus
OUTPUT CYCLE
INPUT CYCLE
Address Enable
Test Mode
High-Z state
AEN switches low
AEN switches high
TEST switches low (AEN must be low)
TEST switches high
AEN switches low
AEN switches high
AEN switches low
AEN switches high
34 cycles
50 cycles
Selected output
Selected input
EEDataOut
copied out
goes low
to the
pin
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