Hi Champs,
I have question about IIC whenthe module working at salve modes.
Below are the IIC user mannul--Operating Modes description, so did it means if IIC module working in Slave-receiver modes , when RSFULL = 1 , the SCL will be hold low? if IIC module working in Slave-transmitter mode , when XSMT = 0 , the SCL will be hold low?
If yes, when the SCL be hold low, how to release the SCL?
Except RSFULL = 1 and XSMT = 0 , any other case will hold the SCL low?
Slave-receiver modes
The I2C module is a slave and receives data from a master.
All slaves begin in this mode. In this mode, serial data bits received on SDA are shifted in with
the clock pulses that are generated by the master. As a slave, the I2C module does not
generate the clock signal, but it can hold SCL low while the intervention of the device is
required (RSFULL = 1 in I2CSTR) after a byte has been received. See section Section 14.2.7
for more details.
Slave-transmitter mode
The I2C module is a slave and transmits data to a master.
This mode can be entered only from the slave-receiver mode; the I2C module must first receive
a command from the master. When you are using any of the 7-bit/10-bit addressing formats,
the I2C module enters its slave-transmitter mode if the slave address byte is the same as its
own address (in I2COAR) and the master has transmitted R/W = 1. As a slave-transmitter, the
I2C module then shifts the serial data out on SDA with the clock pulses that are generated by
the master. While a slave, the I2C module does not generate the clock signal, but it can hold
SCL low while the intervention of the device is required (XSMT = 0 in I2CSTR) after a byte has
been transmitted. See section Section 14.2.7 for more details.
