RM0345 datasheet(27/38 Pages) STMICROELECTRONICS

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RM0345

Calibration software compatibility and configuration

Doc ID 024080 Rev 3

27/38

9.2

Example Configuration CODE

The following code is used to configure the calibration bus for 16bit de-multiplexed mode.

//---------------------------------------------------

// SIU PCR (Pad Configuration Register) setup

// (Cal BUS bommon drive strength = 20pF, DSC = 0b01)

//---------------------------------------------------

SIU.PCR[336].R = 0x0040;//CAL_CS[0]DSC=20pF (0b01)

SIU.PCR[338].R = 0x0440;//CAL_CS[2] (PA=0b1),DSC=20pF (0b01)

SIU.PCR[339].R = 0x0040;//CAL_ADDR[11] (PA=0b0), DSC=20pF (0b01)

SIU.PCR[340].R = 0x0040;//CAL_ADDR[12..15], DSC=20pF (0b01)

SIU.PCR[345].R = 0x0040;//CAL_ADDR[16..30], DSC=20pF (0b01)

SIU.PCR[341].R = 0x0040;//CAL_DATA[0..15], DSC=20pF (0b01)

SIU.PCR[342].R = 0x0040;//CAL_RD/WR, CAL_WE[0-1], CAL_OE, DSC=20pF

(0b01)

SIU.PCR[343].R = 0x0040;//CAL_ALE, DSC=20pF (0b01)

//--------------------------------------------------

// SIU ECCR (External Clock Control Register) setup

//--------------------------------------------------

SIU.ECCR.R = 0x1000//External Bus Division Factor = 1 (EBDF=0b00)

//--------------------------------------------------

// EBI Registers setup

//--------------------------------------------------

//-----------------------------------------------------------------

// EBI MCR setup for 16-bit bus configuration:

// EARP = 01 (Equal priority);

// D16_31 = 0 (DATA[0:15] signals are used for 16-bit port accesses);

// AD_MUX = 1 (Addr on Data Multiplexing Mode is used for non-CS acc.);

// DBM = 0 (32-bit Data Bus Mode is used);

EBI.MCR.R = 0x802;

//------------------------------------------------------

// EBI Base Register setup for 16-bit bus configuration:

// Base Address = 0x20000000;

// PS = 1 (16-bits port size)

// AD_MUX = 1 (Address on Data Multiplexing Mode is enabled for this chip select);

// WEBS = 1 (Use BE function);

// BI = 1 (Disable burst accesses for this bank);

// V = 1 (Valid CS Bank)

EBI.CAL_CS[0].BR.R = 0x200008A3;

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