PC87322VF Datasheet, PDF (64/84 Pages) National Semiconductor (TI) – Floppy Disk Controller with Dual UARTs, Enhanced Parallel Port, and IDE Interface

9 0 Device Description (Continued)
DC CHARACTERISTICS Under Recommended Operating Conditions (Continued)
Symbol
Parameter
Conditions
MICROPROCESSOR PARALLEL PORT AND IDE INTERFACE PINS
V_OH
Output High Voltage
I_OH e b15 mA on
D0–D7 IDED7 IRQ3 – IRQ7 DRQ
Min Typ
Max
Units
I_OH e b6 mA on
24
V
PD0– PD7 DTR RTS SOUT
MFM DRATE CSOUT
IDEHI IDELO HCS
V_OL
Output Low Voltage
I_OL e 24 mA on
D0–D7 IDED7 IRQ3 – IRQ7 DRQ
ZWS IOCHRDY MFM CSOUT
I_OL e 16 mA on PD0 – PD7
I_OL e 12 mA on
DTR RTS SOUT HCS
AFD INIT SLIN STB
(Note 6)
04
V
I_OL e 6 mA on
DRATE IDEHI IDELO
I_OZ
Input TRI-STATE Leakage Current
(D7 – D0 IRQ3–IRQ7 DRQ)
DISK INTERFACE PINS (Note 5)
V_IN e V_DD
V_IN e V_SS
50
mA
b50
V_H
V_OH
V_OL
I_LKG
Input Hysteresis
Output High Voltage (Note 7)
Output Low Voltage
Output High Leakage Current (Note 7)
OSCILLATOR PIN (XTAL1 CLK)
I_OH e b4 mA
I_OL e 40 mA
V_IN e V_DD
V_IN e V_SS
250
mV
24
V
04
V
10
b10
mA
V_IH
V_IL
I_XLKG
XTAL1 Input High Voltage
XTAL2 Input Low Voltage
XTAL1 Leakage
V_IN e V_DD
V_IN e V_SS
20
V
04
V
400
b400
mA
Note 5 When PPM is active and FDC is selected via the parallel port pins the parallel port pins behave as the other Disk Interface pins If FDC is not selected (PNF
e 1) or PPM is not active the parallel port pins behave normally
Note 6 The printer control pins AFD INIT SLIN STB are open drain pins Use a 4 7 kX pull-up resistor
Note 7 V_OH for the disk interface pins is valid for CMOS buffered outputs only
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