pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 376

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

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7.0 Device Specifications
7.2.7
Symbol: OD
7.2.8
Symbol: O
7.2.9
1. All pins are back-drive protected, except for output pins with PCI buffer type (IN
2. The following pins have an internal static pull-up resistor and therefore may have leakage current to V
3. The following strap pins have an internal static pull-down resistor enabled during Power-Up reset and therefore may have
4. I
7.2.10 Terminology
Back-Drive Protection. A pin that is back-drive protected does not sink current into the supply when an input voltage higher
than the supply, but below the pin’s maximum input voltage, is applied to the pin. This is true even when the supply is inac-
tive. Note that active pull-up resistors and active output buffers are typically not back-drive protected.
5-Volt Tolerance. An input signal that is 5V tolerant can operate with input voltage of up to 5V even though the supply to
the device is only 3.3V. The actual maximum input voltage allowed to be supplied to the pin is indicated by the maximum
high voltage allowed for the input buffer. Note that some pins have multiple buffers, not all of which are 5V tolerant. In such
cases, there is a note that indicates at what conditions a 5V input may be applied to the pin; if there is no note, the low max-
imum voltage among the buffers is the maximum voltage allowed for the pin.
Symbol
Symbol
Output, TTL-compatible open-drain output buffer, capable of sinking n mA. Output from these signals is open-drain and
is never forced high.
analog type pins (O
SCL1-2, SDA1-2, IOPA7-0, IOPB7-0, IOPC7-0, IOPD7-0, IOPE7-4, IOPF7-0, KBSIN0-7, PSCLK1-4, PSDAT1-4.
leakage current to V
V
V
OH
V
OH
OL
OL
is valid for a GPIO pin only when it is not configured as open-drain.
Output, Open-Drain Buffer
Output, PCI 3.3V
Exceptions
PCI I
Output High Voltage
Output Low Voltage
Output Low Voltage
n
DA
SS
and O
(when V
Parameter
Parameter
DI
).
IN
(Continued)
= V
SUP
): BADDR1-0, ENV1-0, SHBM, TRIS.
376
l
l
out
out
Conditions
I
Conditions
= 500 A
= 1500 A
I
OL
OL
= 50 A
= n mA
PCI
or O
0.9 V
PCI
Min
), oscillator (O
Min
DD
CC
0.1 V
Max
0.4
0.2
Max
(when V
DD
OSC
) and all
Revision 1.07
Unit
IN
V
V
Unit
= 0):
V
V