MEC1404 Datasheet, PDF (494/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
TABLE 42-4: MAXIMUM CAPACITIVE LOADING
Parameter
Limits
Symbol
Unit
MIN
TYP
MAX
Notes
Input Capacitance (SPI pins)
Output Capacitance (SPI pins)
Input Capacitance (all other input
pins)
Output Capacitance (all other output
pins)
C_IN
C_OUT
C_IN
C_OUT
6
pF
Note 42-3
8
pF
Note 42-3
10
pF
Note 42-4
20
pF
Note 42-5
Note 42-2
Note 42-3
Note 42-4
Note 42-5
The PCI buffers are designed to meet the defined PCI Local Bus Specification, Rev. 2.1, electrical
requirements.
This parameter is measured only for initial qualification and after a design or process change that
could affect this parameter.
All input buffers can be characterized by this capacitance unless otherwise specified.
All output buffers can be characterized by this capacitance unless otherwise specified.
42.2.4 DC ELECTRICAL CHARACTERISTICS FOR I/O BUFFERS
TABLE 42-5: DC ELECTRICAL CHARACTERISTICS
Parameter
Symbol MIN
TYP MAX Units
PIO Type Buffer
All PIO Buffers
Pull-up current
I_PU
Pull-down current
I_PD
I Type Input Buffer
Low Input Level
V_ILI
High Input Level
V_IHI
Tolerance
Schmitt Trigger Hys-
teresis
O-2 mA Type Buffer
V_HYS
39
84
162
A
39
65
105
A
0.3x
V
VTR
0.7x
V
VTR
3.63
V
400
mV
Low Output Level
V_OL
High Output Level
V_OH
VTR-
0.4
0.4
V
V
Tolerance
Comments
Internal PU/PD selected via the GPIO
Pin Control Register.
TTL Compatible Schmitt Trigger Input
This buffer is not 5V tolerant.
I_OL = 2 mA
I_OH = -2 mA
This buffer is not 5V tolerant.
DS00001956D-page 494
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