User's Manual
Wi-Fi&Bluetooth Module Series
FC41D_Hardware_Design
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3.7. I2C Interface
FC41D module provides an I2C interface that support support master mode only with maximum clock
frequency of 400 kHz and 7-bit addressing. It can be used to connect peripherals such as EEPROM.
Table 10: I2C Pin Definition
3.8. PWM Interface
*
FC41D module provides 1 PWM channel by default, and can supports up to 6 PWM interfaces through
multiplexing from other interfaces. Each PWM channel has three modes: Timer mode, PWM mode,
Capture mode, and each mode of each channel is multiplexed 32-bit count. The period and duty cycle
are configurable on PWM mode.
The following table show the pin description of PWM interfaces.
Table 11: PWM Pin Definition
t(mih)
SPI hold time of master mode data input
1.0
-
-
ns
Pin Name
Pin No.
I/O
Description
Function
I2C_SCL
4
OD
I2C serial clock
Require external
pull-up to 3.3 V
I2C_SDA
5
OD
I2C serial data
Pin Name
Pin No.
I/O
Function
Default Function
Alternate Function
GPIO2
22
DO
GPIO2
PWM1
GPIO3
23
DO
GPIO3
PWM2
GPIO4
24
DO
GPIO4
PWM3
PWM
11
DO
PWM4
NET_STATUS
12
DO
NET_STATUS
PWM5