mcimx50 Freescale Semiconductor, Inc, mcimx50 Datasheet - Page 34

• Manufacturer Part Number: mcimx50
• Description: I.mx50 Applications Processors For Consumer Products
• Manufacturer: Freescale Semiconductor, Inc

1
2
Electrical Characteristics
4.4
This section defines the I/O impedance parameters of the i.MX50 processor.
4.4.1
Table 21
4.4.2
Table 22
34
Output driver
impedance
Output driver
impedance
Output driver
impedance
Output driver
impedance
To maintain a valid level, the transitioning edge of the input must sustain a constant slew rate (monotonic) from the current DC
level through to the target DC level, VIL or VIH. Monotonic input transition time is from 0.1 ns to 1 s. VIL and VIH do not apply
when hysteresis is enabled.
Hysteresis of 250 mV is guaranteed over all operating conditions when hysteresis is enabled.
Parameter
Parameter
shows the GPIO output buffer impedance of the i.MX50 processor.
shows the LVIO output buffer impedance of the i.MX50 processor.
Output Buffer Impedance Characteristics
GPIO Output Buffer Impedance
LVIO Output Buffer Impedance
Symbol
Symbol
Rpu
Rpd
Rpu
Rpd
i.MX50 Applications Processors for Consumer Products, Rev. 0
Low drive strength, Ztl = 150 Ω
Medium drive strength, Ztl = 75 Ω
High drive strength, Ztl = 50 Ω
Max drive strength, Ztl = 37.5 Ω
Low drive strength, Ztl = 150 Ω
Medium drive strength, Ztl = 75 Ω
High drive strength, Ztl = 50 Ω
Max drive strength, Ztl = 37.5 Ω
Low drive strength, Ztl = 150 Ω
Medium drive strength, Ztl = 75 Ω
High drive strength, Ztl = 50 Ω
Max drive strength, Ztl = 37.5 Ω
Low drive strength, Ztl = 150 Ω
Medium drive strength, Ztl = 75 Ω
High drive strength, Ztl = 50 Ω
Max drive strength, Ztl = 37.5 Ω
Table 21. GPIO Output Buffer Impedance
Table 22. LVIO Output Buffer Impedance
Test Conditions
Test Conditions
Min
Min
80
40
27
20
64
32
21
16
80
40
27
20
64
32
21
16
2.775 V
2.775 V
OVDD
OVDD
104
104
52
35
26
88
44
30
22
52
35
26
88
44
30
22
Typ
Typ
1.875V
1.875V
OVDD
OVDD
150
134
150
134
75
51
38
66
44
34
75
51
38
66
44
34
Freescale Semiconductor
Max
Max
250
125
243
122
250
125
243
122
83
62
81
61
83
62
81
61
Unit
Unit
Ω
Ω
Ω
Ω