Z53C80SCSI ZILOG [Zilog, Inc.], Z53C80SCSI Datasheet - Page 3

• Manufacturer Part Number: Z53C80SCSI
• Description: SMALL COMPUTER SYSTEM INTERFACE (SCSI)
• Manufacturer: ZILOG [Zilog, Inc.]

PS97SCC0200
Z
ILOG
/RESET
D7-D0
A2-A0
/IOW
/IOR
/CS
CPU BUS
Interface
/RESET
READY
/DB7-/DB0,
/DACK
GND
A2-A0
D7-D0
DRQ
/EOP
/IOW
IRQ
/IOR
/DBP
/CS
Interface
Control
Logic
DMA
Logic
Figure 2a. SCSI Block Diagram
Figure 2b. SCSI Pin Functions
/ACK
/ATN
Z53C80
SCSI
/BSY
48 mA SCSI Transceivers
/MSG
Interrupt
Register
Logic
Data
Input
I//O
/DB7-/DB0, /DBP
/REQ
/SEL
/ACK
/MSG
C//D
/RST
VCC
/ATN
/BSY
I//O
C//D
/REQ
Registers
Register
/RST
Control
Output
Data
/SEL
Z53C80 SCSI
3