Q: A: What does USIF stand for? USIF stands for 'Universal Serial Interface'. Q: A: How to abbreviate 'Universal Serial Interface'? 'Universal Serial Interface' can be abbreviated as USIF. Q: A: What is the meaning of USIF abbreviation? The meaning of USIF abbreviation is 'Universal Serial Interface'. Q: A: What is USIF abbreviation?
One of the definitions of USIF is 'Universal Serial Interface'. Q: A: What does USIF mean? USIF as abbreviation means 'Universal Serial Interface'. Q: A: What is shorthand of Universal Serial Interface?
The most common shorthand of 'Universal Serial Interface' is USIF.
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Contents. Getting Started This section covers the I2C function of the USI found in the MSP430G2xxx devices. The I2C is state machine driven and can seem daunting the 1st time it is used. This section simplifies the use of the state machine and the interaction with the USI module. Making things easier There are some functions described below that once understood, will make the USI I2C easier to utilize.
Rs232 Serial Interface Cable
Contents. USI Module I2C Registers As stated in the User's Guide documentation, the USI (Universal Serial Interface) module is configured if the following configuration is set:. USII2C = 1.
USICKPL = 1. USICKPH = 0.
USILSB and USI16B cleared. USIPE6 and USIPE7 set to enable SCL and SDA port function For I2C mode, the following registers and bit fields play important role on establising the I2C communication:. The 16 bit serial register (USISR) containing the input/output data - however in I2C mode, the USISR is used only 8 bit wide (USISRL). The USIOE bit of USICTL0 register controls the input/output direction of the shift register USISRL. The USICNTx bits of USICNT register determines how many bit(s) shall be transmitted/received. If USIMST bit of USICTL0 is set (i.e. Node is acting as I2C master), setting the USICNTx with a value greater than zero will directly cause the clock signals generated on the SCL line, with the number of clock signals corresponds to the USICNTx bits value.
USICTL0 &= USIOE; // set SDA as input USICNT = (USICNT & 0xE0 ) + NUMOFBYTE; The NUMOFBYTE is usually 8 for receiving a data byte or 1 for receiving (N)ACK bit. If the node acts as I2C master, the SCL signal will be generated (as many as the USICNTx bits value) as soon as the USICNTx bit is written and the content of SDA line will be shifted into the USISRL register. If the node acts as I2C slave, the USI module waits for incoming SCL signal before shifting in the data inside USIRL. The following code snippet shows how the I2C transmission can be done. USICTL0 = USIOE; // set SDA as output USISRL = DATABYTETOBESENT; USICNT = (USICNT & 0xE0 ) + NUMOFBYTE; The NUMOFBYTE is usually 8 for sending a data byte or 1 for sending (N)ACK bit. If the node acts as I2C master, the SCL signal will be generated (as many as the USICNTx bits value) as soon as the USICNTx bit is written and the USISRL register content will be also shifted out along the clock signal at SCL line. If the node acts as I2C slave, the USI module waits for incoming SCL signal before shifting out the data inside USIRL.
Crack para autocad 2000i. Generating START/STOP condition - Setting SDA Line without SCL signal In I2C protocol, a START condition which marks the start of an I2C packet is defined as a HIGH to LOW transission of SDA line while SCL line is held HIGH. On the other side the STOP condition is defined as LOW to HIGH transission of SDA line while SCL is held HIGH. As mentioned above, usually the content of USISRL register corresponding to the value SDA lin, will not be outputted with any transmission/reception of clock signal on SCL line. However for example to generate START and STOP signal, it should be possible to output the MSB value of USISRL register without any clock signal on SCL line. This can be done by setting USIGE and USIOE bits of USICTL0 register to bypass the MSB value into the SDA line.
The following code shows an example on generating START condition.