FM6124-QG Ramtron, FM6124-QG Datasheet - Page 44

• Manufacturer Part Number: FM6124-QG
• Description: FRAM, 24KB, EVENT DATA REC, QFP44
• Manufacturer: Ramtron

Specifications of FM6124-QG

• Memory Size: 24KB
• Nvram Features: RTC
• Supply Voltage Range: 3V To 3.6V
• Memory Case Style: QFP
• No. Of Pins: 44
• Operating Temperature Range: -40°C To +85°C
• Package / Case: QFP
• Interface: I2C
• Memory: RoHS Compliant
• Interface Type: I2C, Serial, 2-Wire
• Rohs Compliant: Yes
• Access Time: 100 KBPs
• Operating Supply Voltage: 3 V to 3.6 V
• Mounting Style: SMD/SMT
• Lead Free Status / Rohs Status: Details

////////////////////////////////////////////////////////////////////////////////
// Function:
// Description:
// Parameters:
// Return value:
// Remarks:
//
//
////////////////////////////////////////////////////////////////////////////////
ruint8
FM6124ReadFRAM(ruint16 a_uiFramAddr)
{
}
Rev. 4.0 (EOL)
July 2010
ruint8 l_uiDataRead;
// Make sure I2C is Idle
while(!(I2CSTATUS & 0x08));
// Wait for TX Buffer to be empty
while((I2CSTATUS & 0x01) == 0);
// Dummy Read to clear the I2CRXAVF
l_uiDataRead = I2CRXTX;
// Send Write command to FM6124
I2CRXTX = I2C_ID_FM | g_uiI2CDevSelect | IC2_WRITE;
// Wait for TX Buffer to be empty
while((I2CSTATUS & 0x01) == 0);
// Make sure we received an ACK and that there was no error during transfer
if (I2CSTATUS & 0xC0)
{
}
// Send Read Address, 8 MSB
I2CRXTX = (a_uiFramAddr >> 8) & 0xFF;
// Wait for TX Buffer to be empty
while((I2CSTATUS & 0x01) == 0);
// Make sure we received an ACK and that there was no error during transfer
if (I2CSTATUS & 0xC0)
{
}
// Send Read Address, 8 LSB
I2CRXTX = a_uiFramAddr & 0xFF;
// Wait for I2C to be Idle, This will generate a STOP
while(!(I2CSTATUS & 0x08));
// Make sure we received an ACK and that there was no error during transfer
if (I2CSTATUS & 0xC0)
{
}
// Now, send the Read command to the FM6124
I2CRXTX = I2C_ID_FM | g_uiI2CDevSelect | IC2_READ;
// Wait for Data to comeback
while(!(I2CSTATUS & 0x02));
l_uiDataRead = I2CRXTX;
// Stop the transaction
I2CCONFIG |= 0x02;
// Wait for I2C to be Idle, This will generate a STOP
while(!(I2CSTATUS & 0x08));
// Make sure we received an ACK and that there was no error during transfer
if (I2CSTATUS & 0xC0)
{
}
return l_uiDataRead;
return 0xFF;
return 0xFF;
return 0xFF;
return 0xFF;
FM6124ReadFRAM
Read 1 byte of Data in the F-RAM of the FM6124
ruint16 a_uiFramAddr
ruint8: Byte read
To Read a data on the I2C, we first need to "fake"
a write operation in order to send the memory address to the
slave module.
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