MC68360RC25K Freescale Semiconductor, MC68360RC25K Datasheet - Page 775
MC68360RC25K
Manufacturer Part Number
MC68360RC25K
Description
IC MPU QUICC 25MHZ 241-PGA
Manufacturer
Freescale Semiconductor
Datasheets
1.MC68EN360VR25L.pdf
(14 pages)
2.MC68EN360VR25L.pdf
(2 pages)
3.MC68360AI25L.pdf
(962 pages)
Specifications of MC68360RC25K
Processor Type
M683xx 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
241-PGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Features
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Part Number:
MC68360RC25K
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Applications
The SCSI bus has a total of 18 signals—9 are used for control, and 9 are used for data (one
parity bit). The bidirectional data lines transfer data, commands, status, and message infor-
9-55
DB0–DB7
Signal
MSG
REQ
DBP
ATN
BSY
ACK
RST
SEL
C/D
I/O
Initiator/Target 8-Bit Bidirectional Data Bus.
Initiator/Target Data-Bus Parity Line. Optional.
Initiator/Target Busy. Indicates that the bus is unavailable for use.
Any Device
Driven By
SCSI
Initiator
Initiator
Initiator
Target
Target
Target
Target
ACK
Attention. Used to send a message to the target when it controls the bus.
Acknowledge. Used by the initiator for handshaking.
Reset. Used to initiate a bus-free phase.
Driven by the target to indicate that the current transfer is a message.
Select. Used by the initiator to select a target before command execution. Also used
by the target to reconnect when the reselection phase is implemented.
Control/Data. Used during the information transfer phases to transfer commands, sta-
tus, data or messages over the bus.
Request. Used by the target during information transfer phases.
Input/Output. Determines the direction of the transfer.
Freescale Semiconductor, Inc.
For More Information On This Product,
ATN
Figure 9-17. SCSI Bus Signals
Table 9-1. SCSI Bus Signals
SEL
MC68360 USER’S MANUAL
Go to: www.freescale.com
HOST BUS ADAPTER (53C90)
HOST PROCESSOR (QUICC)
RST
DISK CONTROLLER
BSY
DISK
C/D
HOST BUS
Signal Explanation
I/O
REQ
MSG
DATA
LINES
BUS
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