1.25.22 Static Memory Controller (SMC)

The Static Memory Controller (SMC) generates the signals that control the access to the external memory devices or peripheral devices. It has 6 Chip Selects and a 26-bit address bus. The 32-bit data bus can be configured to interface with 8-, 16-, or 32-bit external devices. Separate read and write control signals allow for direct memory and peripheral interfacing. Read and write signal waveforms are fully parametrizable.

The SMC can manage wait requests from external devices to extend the current access. The SMC is provided with an automatic slow clock mode. In slow clock mode, it switches from user-programmed waveforms to slow-rate specific waveforms on read and write signals. The SMC supports asynchronous burst read in page mode access for page size up to 32 bytes.

Using The Library

Static Memory Controller (SMC) is initialized as configured in the MHC as part of System Initialization.

Library Interface

Static Memory Controller peripheral library provides the following interfaces:

Functions

Name	Description
SMC_Initialize	Initializes Static Memory Controller (SMC) interface
SMC_DataAddressGet	Returns the External Bus Interface (EBI) address for the requested chip select number
SMC_CommandWrite	Writes command to the External Bus Interface (EBI) address
SMC_CommandWrite16	Writes 16-bit command to the External Bus Interface (EBI) address
SMC_AddressWrite	Writes address to the External Bus Interface (EBI) address
SMC_AddressWrite16	Writes 16-bit address to the External Bus Interface (EBI) address
SMC_DataWrite	Writes data to the External Bus Interface (EBI) address
SMC_DataWrite16	Writes 16-bit data to the External Bus Interface (EBI) address
SMC_DataRead	Reads data from the External Bus Interface (EBI) address
SMC_DataRead16	Reads 16-bit data from the External Bus Interface (EBI) address
SMC_CallbackRegister	Sets the pointer to the function (and it's context) to be called when the given SMC's interrupt occurred
PMECC_CallbackRegister	Sets the pointer to the function (and it's context) to be called when the given PMECC's interrupt occurred
PMERRLOC_CallbackRegister	Sets the pointer to the function (and it's context) to be called when the given PMERRLOC's interrupt occurred
PMECC_DataPhaseStart	Enables PMECC Write access and start data phase
PMECC_StatusIsBusy	Returns PMECC busy status
PMECC_ErrorGet	Returns PMECC error
PMECC_RemainderGet	Returns PMECC remainder
PMECC_ECCGet	Returns error correction code (ECC)
PMERRLOC_ErrorLocationGet	Find and returns error location of memory
PMERRLOC_ErrorLocationDisable	Disables error location of memory
PMERRLOC_SigmaSet	Set sigma value to the PMERRLOC register
PMERRLOC_ErrorLocationFindNumOfRoots	Find the number of roots using PMERRLOC acceleration

Data types and constants

Name	Type	Description
SMC_CALLBACK	Typedef	Defines the data type and function signature for the SMC peripheral callback function
PMECC_CALLBACK	Typedef	Defines the data type and function signature for the PMECC peripheral callback function
PMERRLOC_CALLBACK	Typedef	Defines the data type and function signature for the PMERRLOC peripheral callback function