PC87332VLJ-5 NSC [National Semiconductor], PC87332VLJ-5 Datasheet - Page 16

• Manufacturer Part Number: PC87332VLJ-5
• Description: PC87332VLJ (3.3V/5V) and PC87332VLJ-5 (5V) (SuperI/OTM III Premium Green) Floppy Disk Controller, Dual UARTs, IEEE1284 Parallel Port, and IDE Interfac
• Manufacturer: NSC [National Semiconductor]

WP
WP
WRITE
X1 OSC
X2
ZWS
Symbol
1 0 Pin Description
Normal
Mode
PPM
Mode
Pin
36
92
95
7
8
3
I O
O
O
O
I
I
I
Write Protect This input indicates that the floppy disk in the selected drive is write protected
Write Protect This pin provides an additional Write Protect signal in PPM Mode when PNF
PD2 and Table 7-5 for further information )
Write Strobe This signal is used in EPP mode as a write strobe It is active low (See STB and Table 7-5
for further information )
Crystal1 Clock One side of an external 24 MHz 48 MHz crystal is attached here The other side of the
crystal is connected to X2 If a crystal is not used a TTL or CMOS compatible clock is connected to this
pin
Crystal2 One side of an external 24 MHz 48 MHz crystal is attached here The other side of the crystal is
connected to X1 OSC This pin is left unconnected if an external clock is used
Zero Wait State This pin is the Zero Wait State open drain output pin when bit 6 of FCR is 0 ZWS is
driven low when the EPP or ECP is written and the access can be shortened This pin is PWDN when bit 6
of FCR is 1 (See the PWDN pin for further information )
(Continued)
16
Function
e
0 (See