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How fast does it work on external GPIO pin via the Multi-IO Cable?
Q:
Sometimes it is handy to use some GPIO pins to implement a second or third port,
A:
such as I2C, SPI, UART or PWM etc., called software I2C, software SPI, software UART,
software PWM for software real-time requirement application, even if running at low speed.
BE905A2 also can support this application. However, The toggle switch speed of GPIO pin is
200Hz (max), so we don't suggest using it on simulate I2C application. The reason is the
maximum physical speed is lower than standard I2C's speed. Even though, you still can use it
on low PWM control application, but please note that his speed is 200Hz (max).
For reference:
The official I2C bus protocol supports three modes of transfer rates:
Standard Mode — Up to 100 Kbps
Fast Mode — Up to 400 Kbps
High-Speed Mode — Up to 3.4 Mbps
Connector type of ADC and GPIO
Since the connector type of both GPIO and ADC on the Multi I/O cable is the JST male
connector (it's the JST SMR-02V-B precisely), users should look for the corresponding plug-in
connector (the JST SMP-02V-BC) for their oppositely connected devices. Please refer to below
table for the details. It is suggested to use JST SMP-02V-BC to connect to JST SMR-02V-B,
which is the connector used for GPIO and ADC among the Multi I/O cable.
Receptacle housing (for pin contact)
Plug housing (for socket contact)
63
Rev. V0.6
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