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PC87306 Datasheet(PDF) 15 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87306
Description  PC87306 SuperI/OTM Enhanced Sidewinder Lite Floppy Disk Controller, Keyboard Controller, Real-Time Clock, Dual UARTs, Infrared Interface, IEEE 1284 Pa
PDF  110 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87306 Datasheet(HTML) 15 Page - National Semiconductor (TI)

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10 Pin Description (Continued)
TABLE 1-1 Pin Descriptions (Alphabetical)
(Continued)
Symbol
Pin
IO
Function
X2C
9
O
Crystal2 Slow
Output for the internal Real-Time Clock crystal oscillator amplifier
ZWS
24
O
Zero Wait State
This pin is the Zero Wait State open drain output pin ZWS is driven low when the EPP
or the ECP is written and the access can be shortened
Reserved
31
Reserved
This pin must be left unconnected
FIGURE 1-1 Pins Which Utilize the Strap Function During Reset
Pin
Symbols
84
IDEL0 CFG0
87
HCS0 SELCS
106
DTR1 CFG1
108
SOUT1BOUT1BADDR1
109
RTS1 BADDR0
FIGURE 1-2 Multi-Function Pins
Pin
Symbols
98
SOUT2BOUT2
108
SOUT1BOUT1
119
AFD DSTRB
123
SLIN ASTRB
126
BUSYWAIT
137
STB WRITE
15



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