TC39x BC/BD-Step
Electrical Specification5 V / 3.3 V switchable Pads
Table 3-8 Fast 3.3V GPIO (cont’d)
Parameter
Symbol
Values
Typ.
Unit
Note / Test Condition
Min.
Max.
Input high voltage level
VIH SR
0.7 *
-
-
V
AL
VEXT/FLEX/E
VRSB
2.0
-
-
-
-
V
V
TTL
1.4
TTL (degraded, used
for CIF)
Input low voltage level
VIL SR
-
-
0.42 *
V
AL
VEXT/FLEX/E
VRSB
-
-
-
-
0.8
V
V
TTL
0.5
1.9
33
TTL (degraded, used
for CIF)
Input low/high voltage level
Input low threshold variation
V
V
ILH SR
ILD SR
1.0
-33
-
-
V
RGMII; no hysteresis
available
mV
max. variation of 1ms;
VEXT/FLEX/EVRSB
=
constant; AL
Pin capacitance
CIO CC
SET CC
-
-
2
-
3
pF
ns
in addition 2.5pF from
package to be added
Pad set-up time to get an
software update of the
configuration active
t
100
1) In the formulas the value of CL needs to be entered in pF to obtain results in ns.
2) Rise / fall times are defined 10% - 90% of pad supply voltage.
3) Hysteresis is implemented to avoid metastable states and switching due to internal ground bounce. It can't be guaranteed that
it suppresses switching due to external system noise.
4) Values for Pull-up resistor is defined via parameter RMDU in table VADC 5V.
5) Values for Pull-down resistor is defined via parameter RMDD in table VADC 5V.
Table 3-9 Slow 5V GPIO
Parameter
Symbol
Values
Typ.
225
Unit
Note / Test Condition
Min.
Max.
On-Resistance of pad output
Rise / Fall time 1) 2)
R
DSON CC
125
320
Ohm
medium driver; IOH / OL =
2mA
t
RF CC
4+0.55*CL 4+0.75*CL 12+1*CL ns
1.5+0.25* 2.5+0.40* 7+0.55*CL ns
driver = medium edge =
medium ; CL≤200pF
driver = medium edge =
CL
CL
sharp ; CL≤200pF
Asymmetry of sending
t
TX_ASYM CC -1
-
1
ns
valid for all data rates
excluding clock
tolerance
Input frequency
Data Sheet
fIN CC
-
-
160
MHz
418
V 1.2, 2021-03
OPEN MARKET VERSION
INFINEON [ Infineon ]
