NS486SXF Datasheet, PDF (21/44 Pages) National Semiconductor (TI) – NS486TMSXF Optimized 32-Bit 486-Class Controller with On-Chip Peripherals for Embedded Systems

3 0 Device Specifications (Continued)
3 1 4 9 REAL TIME CLOCK (RTCX1 CLK)
Symbol
Parameter
Condition
Min
V_IH
RTCX1 Input High Voltage
20
V_IL
RTCX1 Input Low Voltage
V_BAT
Battery Voltage
24
I_BAT
Battery Current
V_BAT e 3 0 V
3 1 4 10 PCMCIA (RIO8-15)
Symbol
V_OH
V_OL
Parameter
Output High Voltage
Output Low Voltage
Condition
I_OH e b12 mA on
V_CC SEL V_PP SEL1 V_PP SEL2
I_OH e b6 mA on
DIR ENABLE REG CD RST BUSY LED
GPI RSV (RSV is a reserved usage pin)
I_OL e 12 mA on
V_CC SEL V_PP SEL V_PP SEL2
I_OL e 6 mA on
DIR ENABLE REG CD RST BUSY LED
GPI RSV (RSV is a reserved usage pin)
Max
Unit
Notes
RTCX2 is
the output
04
V
V
Lithium
Battery
3
mA
Min Max Unit
Notes
Power
Switch
24
V 1 Card at a
50 pF Load
04
V
3 1 4 11 IEEE-1284 PORT (ECP MODE) AND (RIO16-31)
Symbol
Parameter
Condition
Min
Max
Unit
Notes
I_CH
High-Level Output Current
V_OH e 2 4V on
(Note 4)
PD 7 0 SLIN STB AFD
14
mA
PE INIT ACK SLCT ERR BUSY
I_CL
Low-Level Output Current
V_OL e 0 4V on
PD 7 0 SLIN STB AFD
14
mA
PE INIT ACK SLCT ERR BUSY
Note 4 When ECP mode 0 or ECP mode 2 and bit 1 of PCR is 0 for the parallel port are selected pins AFD INIT SLIN and STB are open drain supports 4 7 kX
resistors should be used The ECP I Os have over-voltage protection against being backdriven by higher external voltages when the I Os are at TRI-STATE The
I Os also isolate the NS486SXF power-rail from external voltages when the chip is powered down The maximum power-down leakage is 1 mA to ground
3 1 4 12 TIMER
Symbol
Parameter
Condition
Min
Max
Unit
Notes
V_OH
Output High Voltage
I_OH e b6 mA on T0 T1
24
V
V_OL
Output Low Voltage
I_OL e 6 mA on T0 T1
04
V
21
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