I am trying to interface HMC832 with TI-MSP430G2553 through Bit Banging SPI Protocol,But I am unable to get the output.
I have send data on MSB first format on falling edge of Master Clock.
Thanks for help in advance.
The HMC832 SPI interface can operate in two modes. After power-on the device must detect a rising edge on SCK before any transition on SEN in order to operate as described in the datasheet (SPI Open Mode). If a rising edge on SEN occurs before SCK the device operates in what is called HMC mode (which is not described in the datasheet). For more information on this mode see section 188.8.131.52 in the Operating Guide at http://www.analog.com/media/en/technical-documentation/user-guides/pll_operating_guide_rf_vcos.pdf .
SPI Open mode is the preferred mode of operation but the device will work equally well in both modes. In fact the eval board control software uses HMC mode.
Since mode detection is only performed after power-on the SEN and SCK signals must not float during this time. Most microcontrollers have the capability to either pull GPIO signals high or low during reset. Check your code has set the power-on default for SEN and SCK to pull-down.
I have followed each and every step mentioned in the data sheet and in the specified document but am not getting any output.Kindly suggest any suggestions.
Can you capture the behavior of SEN, SCK and SDI at power-on and while sending configuration data?
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