GPIO
2
Figure 40 provides the AC test load for the I C.
Output
Z = 50 Ω
0
OV /2
DD
R = 50 Ω
L
2
Figure 40. I C AC Test Load
2
Figure 41 shows the AC timing diagram for the I C bus.
SDA
SCL
t
t
I2KHKL
I2DVKH
t
t
I2SXKL
I2CL
t
t
t
t
I2CH
I2SVKH
I2SXKL
I2PVKH
t
I2DXKL
S
Sr
P
S
2
Figure 41. I C Bus AC Timing Diagram
14 GPIO
This section describes the DC and AC electrical specifications for the GPIO interface of the MPC8572E.
14.1 GPIO DC Electrical Characteristics
Table 55 provides the DC electrical characteristics for the GPIO interface operating at BV = 3.3 V DC.
DD
Table 55. GPIO DC Electrical Characteristics (3.3 V DC)
Parameter
Supply voltage 3.3V
Symbol
Min
Max
Unit
BV
3.13
2
3.47
V
V
DD
High-level input voltage
Low-level input voltage
V
BV + 0.3
IH
DD
V
–0.3
—
0.8
±5
V
IL
Input current
I
μA
IN
1
(BV
= 0 V or BV = BV
)
DD
IN
IN
High-level output voltage
(BV = min, I = –2 mA)
V
BV – 0.2
—
V
V
OH
DD
DD
OH
Low-level output voltage
V
—
0.2
OL
(BV = min, I = 2 mA)
DD
OL
Note:
1. Note that the symbol BV , in this case, represents the BV symbol referenced in Table 1.
IN
IN
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
69
FREESCALE [ Freescale ]
