FM6124-QG Ramtron, FM6124-QG Datasheet - Page 43

• 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:
////////////////////////////////////////////////////////////////////////////////
rbool
FM6124WriteRTC(struct SBCDDate *a_poDate)
{
}
Rev. 4.0 (EOL)
July 2010
ruint8 l_uiCounter
ruint8 *l_puiDateElement
ruint8 l_uiRTCRegValue
// First, we need to read the RTC register of the FM6124
l_uiRTCRegValue = FM6124ReadReg(EDR_REG_RTC);
// Next, we need to enable the writing of the RTC
l_uiRTCRegValue |= 0x02;
FM6124WriteReg(EDR_REG_RTC, l_uiRTCRegValue);
// Make sure I2C is Idle
while(!(I2CSTATUS & 0x08));
// Wait for TX Buffer to be empty
while((I2CSTATUS & 0x01) == 0);
// Send Write command to Slave Module
I2CRXTX = I2C_ID_EDR | 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 Write Address
I2CRXTX = EDR_REG_RTC_SECS;
// 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)
{
}
// Write RTC Data
l_puiDateElement = &(a_poDate->uiSeconds);
for (l_uiCounter = 0; l_uiCounter < 7; l_uiCounter++)
{
}
// Wait for I2C to be Idle, This will generate a STOP
while(!(I2CSTATUS & 0x08));
// Now, we need to restore the original RTC register value.
// Clear "W" bit
// Make sure Oscillator is running: Clear /OSCEN bit
l_uiRTCRegValue &= 0x7D;
FM6124WriteReg(EDR_REG_RTC, l_uiRTCRegValue);
return RTRUE;
return RFALSE;
return RFALSE;
I2CRXTX = *l_puiDateElement;
// 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)
{
}
l_puiDateElement++;
return RFALSE;
FM6124WriteRTC
Write all registers of the RTC of the FM6124.
struct SBCDDate *a_poDate: Date to be written
rbool: RFALSE = Error during read operation.
None
= 0x00;
= NULL;
= 0x00;
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