PSoC™ 5, 3 & 1 Forum Discussions

"CY8C5467LTI-LP003" in the datasheet it mentioned that the power supply recommended is "1.7V to 5.5V" as per that is i power up the chip with the 5V, then the Logic level of "UART,I2C,SPI etc communication protocols" and the GPIO levels are between 5V and 0 as Ground right?  

PSoC 5LP Architecture TRM, p.159, Figure 19-8 shows Mapping of DSI Control Signal to Port Pin Output Enable.

I have a design where an 8 bit Port is used.

Each Port pin should go either to DSI_OE[0] or DSI_OE[1], depending on the value of the corresponding PRT_OE_SEL1, PRT_OE_SEL0 bits.

When using schematics entry, I cannot use 2:1 input multiplexer for DSI_OE[1:0] DSI signals, one for every Port Pin and place all the pins into the same 8 bit Port.

I there a workaround, please ?

In other words, can I somehow instantiate DSI_OE[1:0] DSI output in the schematic and then use software to write to PRT_OE_SEL1 registers.

(Note what I need: There are 8 port pins which must be on a single Port and each of them is controlled either by DSI_OE[0] or DSI_OE[1]. )

Anybody knows the trick ?

Example file attached.

Hello,

I do not quite follow multi sheet schematic design.

I am getting "No drivers on signals " error messages.

I am attaching a simple 2 sheet schematics which I cannot finalize.

What am I doing wrong, please ?

Sheet 1

Sheet 2

"CY8C5467LTI-LP003" in the datasheet i can not find the max number of UART channels, which specific pins i can use as UART on this chip? and how much the maximum baudrate i can get? is it related to crystal?

Hello,

I tried to measure the Temperautre, but the room temperature is shown 85°C instead of 25,20°C . I don't know where the Problem could be.

Best Regards

Tarik

i am designing the project hardware using this "CY8C5467LTI-LP003" chip, i have gone through the datasheet but it does not contain the reference hardware design for the "68QFN" package, can any one provide me some documentation which includes the hardware reference design of the above mentioned chip?

1) I2C of "CY8C5467LTI-LP003" will it require Pull up resistors?

2) in datasheet it shows that this chip contains 2 I2C channels, but in PSoC creator i am only able to place 1 I2C block otherwise it shows error of I2C limit exceed and suggest me to put UDB I2C.

3) if i place UDB I2C block , the error solved and now i have 2 I2C (Master) , in PSoC Creator it shows Master I2C and Slave I2C blocks with their UDBs, now if i place I2C Master Block then the MCU set as Master right? and same with Slave Block if i place Slave block the MCU will set as Slave right?

Dear all,

I have a board based on PSOC5 which is able to measure up to 3 RTDs temperature sensors. Please find attached the block diagram for the temperature sensors and the schematic for one of them.

This schematic is based on C8CKIT-025 evaluation kit of Cypress ( I attached the CY8CKIT-025_User_Guide for easy access), and in particular in pag 27/86. In summary, the working procedure is as follow: there is an IDAC to supply current (1mA) to a calibration resistor, and measure the voltage drop on this (100 ohm) reference resistor through a MUX and the ADC. Then, the same IDAC supply current to the Rrtd (the sensor) and then measure the voltage drop of such sensor. The difference of the voltage give us the temperature.

Passing the CE marked test in a certification laboratory, it was necessary to add 100 serial resistor to all the input to the PSOC when 4KV discharge was done on a plane 1 mm below the board (ESD test) because the PSOC reset. So now I am testing the effect to add such resistor in the board.

I cant not test this but I dont see any problem to add 100 ohms serial resistor in the PT100_P and PT100_N signals because they end in the ADC so they are high impedance signals. do you agree?

On the other hand, what I can test is the behavior when I change R165 and R142 to 100 Ohms.When I do these changes, the temperature seems to go 2-3ºC below the real temperature and I dont understand why, because what I am measure is the voltage drop in the sensor resistor so these changes shouldnt affect. Does anyone can tell me the reason? Is not the IDAC strong enough to supply 1mA to the sensor with this new resistor values?

If you need further details please do not hesitate to ask me.

Any comment will be wellcome.

Thanks in advance,

Joaquin.