NS486SXL Datasheet, PDF (15/26 Pages) National Semiconductor (TI) – Optimized 32-Bit 486-Class Controller with On-Chip Peripherals for Embedded Systems

DRAM Control Unit (Continued)
Symbol
V_OL
Parameter
Output Low Voltage
Conditions
I_OL = 20 mA on:
RAS1–0, CASH1–0, CASL1–0,
WE (Note 7)
Note 6: Max load RAS1–0. CASH1–0, and CASL1–0 is 63 pF.
Note 7: Max load on WE is 50 pF.
Auxiliary Processor Interface
Symbol
V_OH
Parameter
Output High Voltage
V_OL
Output Low Voltage
Conditions
I_OH = −6 mA on: EACK
I_OH = −4 mA on: DRV, EREQ
I_OL = −6 mA on: EACK
I_OL = −4 mA on: DRV, EREQ
IrDA Infra Red/UART
Symbol
V_OH
Parameter
Output High Voltage
V_OL
Output Low Voltage
Conditions
I_OH = −100 µA
I_OH = −6 mA
on: Tx, UCLK, Rx
I_OL = −100 µA
I_OL = 6 mA
on: Tx, UCLK, Rx
External Bus Control
Symbol
V_OH
Parameter
Output High Voltage
V_OL
Output Low Voltage
Conditions
I_OH = −12 mA on:
IOR, IOW, MEMR, MEMW
RESET, RESET, CS16, BHE
[CS16 - min. 10 kΩ pullup]
I_OH = 12 mA on:
IOR, IOW, MEMR, MEMW
RESET, RESET, CS16, BHE
Oscillator (CPUX1/CLK)
Symbol
Parameter
V_OH
Output High Voltage
V_OL
Output Low Voltage
V_IH
OSCX1 Input High Voltage
V_IL
OSCX2 Input Low Voltage
Note 8: OSCX2 is the output.
Conditions
I_OH = −12 mA on: SYSCLK
I_OH = 12 mA on: SYSCLK
(Note 8)
Min
Max
Unit
0.4
V
Min
Max
Unit
2.4
V
0.4
V
Min
V_CC - 0.2
2.4
Max
0.2
0.4
Unit
V
V
V
V
Min
Max
Unit
2.4
V
0.4
V
Min
Max
Unit
2.4
V
0.4
V
2.0
0.4
V
15
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