am79c974 Advanced Micro Devices, am79c974 Datasheet - Page 142

• Manufacturer Part Number: am79c974
• Description: Pcnettm-scsi Combination Ethernet And Scsi Controller For Pci Systems
• Manufacturer: Advanced Micro Devices

PIN DESIGNATIONS (continued)
Quick Reference Pin Description
Listed by Driver Type
The following table describes the various types of drivers that are implemented in the PCnet-SCSI controller. Current
is given as milliamperes:
8
Pin Name
SCSI SPECIFIC
SCSI Interface
SD [7:0]
SDP
MSG
C/D
I/O
ATN
BSY
SEL
SCSI^RST
REQ
ACK
Miscellaneous
SCSI CLK
RESERVE
Power Management
PWDN
Test Interface
BUSY
Power Supplies
AVDD
AVSS
VDD, DVDD
VSS, DVSS
VDDB, VDDBS
VSSB, VSSBS
AMD
Name
OD48
OD6
LED
TS3
TS6
O3
O6
O8
Description
SCSI Data
SCSI Data Parity
Message
Command/Data
Input/Output
Attention
Busy
Select
SCSI Bus Reset
Request
Acknowledge
SCSI Core Clock
Reserved, DO NOT CONNECT
Power Down Indicator
NAND Tree Test Output
Analog Power
Analog Ground
Digital Power
Digital Ground
I/O Buffer Power
I/O Buffer Ground
Type
Tri-State
Tri-State
Totem Pole
Totem Pole
Totem Pole
Open Drain
Open Drain
LED
TM
A M E N D M E N T
Am79C974
IOL (mA)
48
12
3
6
3
6
8
6
Type
IO
IO
IO
IO
IO
O
O
O
P
P
P
P
P
P
I
I
I
I
I
I
I
IOH (mA)
–2.0
–2.0
–0.4
–0.4
–0.4
–0.4
NA
NA
Driver
OD48
OD48
OD48
OD48
OD48
OD48
OD48
O3
NA
NA
NA
NA
NA
NA
# Pins
pF
50
50
50
50
50
50
50
—
11
8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
2
5
9
5