CP2102N Datasheet, PDF (11/44 Pages) Silicon Laboratories – USBXpress Family

3.1.7 GPIO
CP2102N Data Sheet
Electrical Specifications
Table 3.7. GPIO
Parameter
Symbol Test Condition
Min
Typ
Max
Unit
Output High Voltage (High Drive) V_OH
I_OH = -7 mA, V_IO ≥ 3.0 V
V_IO - 0.7
—
—
V
I_OH = -3.3 mA, 2.2 V ≤ V_IO < 3.0 V V_IO x 0.8
—
—
V
I_OH = -1.8 mA, 1.71 V ≤ V_IO < 2.2 V
Output Low Voltage (High Drive) V_OL
I_OL = 13.5 mA, V_IO ≥ 3.0 V
—
—
0.6
V
I_OL = 7 mA, 2.2 V ≤ V_IO < 3.0 V
—
—
V_IO x 0.2
V
I_OL = 3.6 mA, 1.71 V ≤ V_IO < 2.2 V
Output High Voltage (Low Drive) V_OH
I_OH = -4.75 mA, V_IO ≥ 3.0 V
V_IO - 0.7
—
—
V
I_OH = -2.25 mA, 2.2 V ≤ V_IO < 3.0 V V_IO x 0.8
—
—
V
I_OH = -1.2 mA, 1.71 V ≤ V_IO < 2.2 V
Output Low Voltage (Low Drive) V_OL
I_OL = 6.5 mA, V_IO ≥ 3.0 V
—
—
0.6
V
I_OL = 3.5 mA, 2.2 V ≤ V_IO < 3.0 V
—
—
V_IO x 0.2
V
I_OL = 1.8 mA, 1.71 V ≤ V_IO < 2.2 V
Input High Voltage
V_IH
(all GPIO pins including VBUS)
V_IO - 0.6
—
—
V
Input Low Voltage
V_IL
(all GPIO including VBUS)
—
—
0.6
V
Pin Capacitance
C_IO
—
7
—
pF
Weak Pull-Up Current
(V_IN = 0 V)
I_PU
V_DD = 3.6
-30
-20
-10
μA
Input Leakage (Pullups off or Ana- I_LK
log)
GND < V_IN < V_IO
-1.1
—
1.1
μA
Input Leakage Current with V_IN
I_LK
above V_IO
V_IO < V_IN < V_IO+2.0 V
0
5
150
μA
RS485 Setup Time before Start
Bit¹
t_RS485S
0
—
64.02
ms
RS485 Hold Time after Stop Bit^{1 t}RS485H
0
—
64.02
ms
TX Toggle Rate
—
20
—
Hz
RX Toggle Rate
—
20
—
Hz
Note:
1. Programmable from 0 ms to 64 ms in 1 µs steps. The programmed time is the guaranteed minimum, and the actual time may be
up to 20 µs longer.
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