CS8900-CQ3 Cirrus Logic, CS8900-CQ3 Datasheet - Page 16

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

SLEEP - Hardware Sleep, Input Internal Weak Pullup PIN 77.
LINKLED or HC0 - Link Good LED or Host Controlled Output 0, Open Drain Output PIN 99.
BSTATUS or HC1 - Bus Status or Host Controlled Output 1, Open Drain Output PIN 78.
LANLED - LAN Activity LED, Open Drain Output PIN 100.
TEST - Test Enable, Input Internal Weak Pullup PIN 76.
RES - Reference Resistor, Input PIN 93.
DVDD[1:4] - Digital Power, Power PINS 9, 22, 56, and 69.
DVSS[1:4} and DVSS1A, DVSS3A - Digital Ground, Ground PINS 8, 10, 23, 55, 57, and 70.
AVDD[1:3] - Analog Power, Power PINS 90, 85, and 95.
AVSS[0:4] - Analog Ground, Ground PINS 1, 89, 86, 94, 96.
16
Active-low input used to enable the two hardware sleep modes: Hardware Suspend and
Hardware Standby. (See Section 3.7 on page 26.)
When the HCE0 bit of the Self Control register (Register 15) is clear, this active-low output is
low when the CS8900A detects the presence of valid link pulses. When the HC0E bit is set, the
host may drive this pin low by setting the HCBO in the Self Control register.
When the HC1E bit of the Self Control register (Register 15) is clear, this active-low output is
low when receive activity causes an ISA bus access. When the HC1E bit is set, the host may
drive this pin low by setting the HCB1 in the Self Control register.
During normal operation, this active-low output goes low for 6 ms whenever there is a receive
packet, a transmit packet, or a collision. During Hardware Standby mode, this output is driven
low when the receiver detects network activity.
Active-low input used to put the CS8900A in Boundary Scan Test mode. For normal operation,
this pin should be high.
This input should be connected to a 4.99K
circuits.
Provides 5 V ± 5% power to the digital circuits of the CS8900A.
Provides ground reference (0 V) to the digital circuits of the CS8900A.
Provides 5 V ± 5% power to the analog circuits of the CS8900A.
Provide ground reference (0 V) to the analog circuits of the CS8900A.
CIRRUS LOGIC PRODUCT DATA SHEET
± 1% resistor needed for biasing of internal analog
Crystal LAN™ ISA Ethernet Controller
CS8900A
DS271PP3