X930A Datasheet, PDF (19/38 Pages) Intel Corporation – UNIVERSAL SERIAL BUS MICROCONTROLLER

8x930Ax UNIVERSAL SERIAL BUS (USB) MICROCONTROLLER
Table 9. DC Characteristics at Operating Conditions (Continued)
Symbol
Parameter
Min
Typical (1)
Max
Units Test Conditions
I_CC (5) Active I_CC
60
PLLSEL = 110
3 MHz – FS
(in low clock mode)
150
PLLSEL = 110
12 MHz – FS
mA
(not in low clock
mode)
45
PLLSEL = 001
3 MHz – LS
75
PLLSEL = 100
6 MHz – LS
NOTE:
1. Typical values are obtained using V_CC = 5.0V, T_A = 25°C and are not guaranteed.
2. Under steady state (non-transient) conditions, I_OL must be externally limited as follows:
Maximum I_OH per port pin:10 mA
Maximum I_OL per 8-bit port:
Port 0: 26 mA
Ports 1-3: 15 mA
Maximum Total I_OL for all output pins: 71 mA
If I_OL exceeds the test conditions, V_OL may exceed the related specification. Pins are not guaranteed
to sink current greater than the listed test conditions.
3. Capacitive loading on Ports 0 and 2 may cause spurious noise pulses above 0.4 V on the low-level
outputs of ALE and Ports 1, 2 and 3. The noise is due to external bus capacitance discharging into the
Port 0 and Port 2 pins when these pins change from 1 to 0. In applications where capacitive loading
exceeds 100pF, the noise pulses on these signals may exceed 0.8 V. It may be desirable to qualify
ALE or other signals with a Schmitt Trigger or CMOS-level input logic.
4. Capacitive loading on Ports 0 and 2 cause the V_OH on ALE and PSEN to drop below the V_CC specifica-
tion when the address lines are stabilizing.
5. The abbreviations “LS” and “FS” indicate “Low Speed” and “Full Speed,” respectively.
5.3 Definition of AC Symbols
Table 10. AC Timing Symbol Definitions
Signals
Conditions
A Address
D Data In
L ALE
Q Data Out
R RD#/PSEN#
W WR#
H High
L Low
V Valid
X Hold
Z Floating
ADVANCE INFORMATION
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