
http://www.motorola.com/computer/literature
4-25
4
Floppy Disk Drive,
TTL levels
DSKCHG-
Indicates the drive door is open
DIR-
Controls direction of the head during step operations
DRVDENS[1:0]
Disk density select communication
DS[1:0]-
Drive selects
HDSEL-
Selects top or bottom side head
INDEX-
Indicates the beginning of a track
MTR[1:0]
Motor enables
RDATA-
Data read
STEP-
Step, pulses move head in or out
TR0-
Indicates that head is positioned above track 00
WDATA-
Write data to drive
WGATE-
Enables head write circuitry of drive
WPROT-
Indicates disk is write-protected
Universal Serial
Bus (USB) (0 and
1), USB levels
(+) Signal of differential data pair for USB channel
UDATAn-
(-) Signal of differential data pair for USB channel
1
Some signals are redefined when used in EPP/ECP modes
Table 4-22. Signal Descriptions for the CPV5370 Single Board Computer
Backplane Connector (J5) (Continued)
Signal
Signal
Mnemonic
Signal Description
Solution Systems Technologies Inc.
720-565-5995 | info@solusys.com | www.solusys.com
Solution Systems Technologies Inc.
720-565-5995 | info@solusys.com | www.solusys.com