?? sst39vf640xb.cpp
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/* */
/* Output: */
/* None */
/************************************************************************/
void SecID_Query(WORD *SST_SecID, WORD *User_SecID)
{
WORD index;
// Issue the SecID Entry code to 39VF640X
*sysAddress(0x555) = 0x00AA; // write data 0x00AA to device addr 0x555
*sysAddress(0x2AA) = 0x0055; // write data 0x0055 to device addr 0x2AA
*sysAddress(0x555) = 0x0088; // write data 0x0088 to device addr 0x555
Delay_150_Nano_Seconds(); // insert delay time = Tida
// Perform all Security ID operations here:
// SST programmed segment is from address 000000H--000007H,
// User programmed segment is from address 000010H--000017H.
for (index = 0x0000; index <= 0x0007; index++)
{
*SST_SecID = *sysAddress(index);
++SST_SecID;
*User_SecID = *sysAddress(index+0x0010);
++User_SecID;
// Security query data is stored in user-defined memory space.
}
// Issue the Sec ID Exit code thus returning the 39VF640X
// to the read operating mode
*sysAddress(0x555) = 0x00AA; // write data 0x00AA to device addr 0x555
*sysAddress(0x2AA) = 0x0055; // write data 0x0055 to device addr 0x2AA
*sysAddress(0x555) = 0x00F0; // write data 0x00F0 to device addr 0x555
Delay_150_Nano_Seconds(); // insert delay time = Tida
}
/************************************************************************/
/* PROCEDURE: Erase_One_Sector */
/* */
/* This procedure can be used to erase a total of 2048 words. */
/* */
/* Input: */
/* Dst DESTINATION address where the erase operation starts */
/* */
/* Output: */
/* return TRUE: indicates success in sector-erase */
/* return FALSE: indicates failure in sector-erase */
/************************************************************************/
int Erase_One_Sector(Uint32 Dst)
{
Uint32 DestBuf = Dst;
int ReturnStatus;
// Issue the Sector Erase command to 39VF640X
*sysAddress(0x555) = 0x00AA; // write data 0x00AA to device addr 0x555
*sysAddress(0x2AA) = 0x0055; // write data 0x0055 to device addr 0x2AA
*sysAddress(0x555) = 0x0080; // write data 0x0080 to device addr 0x555
*sysAddress(0x555) = 0x00AA; // write data 0x00AA to device addr 0x555
*sysAddress(0x2AA) = 0x0055; // write data 0x0055 to device addr 0x2AA
*sysAddress(DestBuf) = 0x0050; // write data 0x0050 to device sector addr
ReturnStatus = Check_Toggle_Ready(DestBuf); // wait for TOGGLE bit ready
return ReturnStatus;
}
/************************************************************************/
/* PROCEDURE: Erase_One_Block */
/* */
/* This procedure can be used to erase a total of 32K words. */
/* */
/* Input: */
/* Dst DESTINATION address where the erase operation starts */
/* */
/* Output: */
/* return TRUE: indicates success in block-erase */
/* return FALSE: indicates failure in block-erase */
/************************************************************************/
int Erase_One_Block (Uint32 Dst)
{
Uint32 DestBuf = Dst;
int ReturnStatus;
// Issue the Block Erase command to 39VF640X
*sysAddress(0x555) = 0x00AA; // write data 0x00AA to device addr 0x555
*sysAddress(0x2AA) = 0x0055; // write data 0x0055 to device addr 0x2AA
*sysAddress(0x555) = 0x0080; // write data 0x0080 to device addr 0x555
*sysAddress(0x555) = 0x00AA; // write data 0x00AA to device addr 0x555
*sysAddress(0x2AA) = 0x0055; // write data 0x0055 to device addr 0x2AA
*sysAddress(DestBuf) = 0x0030; // write data 0x0030 to device sector addr
ReturnStatus = Check_Toggle_Ready(DestBuf); // wait for TOGGLE bit ready
return ReturnStatus;
}
/************************************************************************/
/* PROCEDURE: Erase_Entire_Chip */
/* */
/* This procedure can be used to erase the entire chip. */
/* */
/* Input: */
/* NONE */
/* */
/* Output: */
/* NONE */
/************************************************************************/
int Erase_Entire_Chip(void)
{
// Issue the Chip Erase command to 39VF640X
*sysAddress(0x555) = 0x00AA; // write data 0x00AA to device addr 0x555
*sysAddress(0x2AA) = 0x0055; // write data 0x0055 to device addr 0x2AA
*sysAddress(0x555) = 0x0080; // write data 0x0080 to device addr 0x555
*sysAddress(0x555) = 0x00AA; // write data 0x00AA to device addr 0x555
*sysAddress(0x2AA) = 0x0055; // write data 0x0055 to device addr 0x2AA
*sysAddress(0x555) = 0x0010; // write data 0x0010 to device addr 0x555
//Delay_50_Milli_Seconds(); // Delay Tsce time
if (Check_Data_Polling (0,0xFFFF))
return TRUE;
else
return FALSE;
}
/************************************************************************/
/* PROCEDURE: Program_One_Word */
/* */
/* This procedure can be used to program ONE word of data to the */
/* 39VF640X. */
/* */
/* NOTE: It is necessary to first erase the sector containing the */
/* word to be programmed. */
/* */
/* Input: */
/* SrcWord The WORD which will be written to the 39VF640XB */
/* Dst DESTINATION address which will be written with the */
/* data passed in from Src */
/* */
/* Output: */
/* return TRUE: indicates success in word-program */
/* return FALSE: indicates failure in word-program */
/************************************************************************/
int Program_One_Word (WORD *SrcWord, Uint32 Dst)
{
Uint32 DestBuf = Dst;
WORD *SourceBuf = SrcWord;
int ReturnStatus;
*sysAddress(0x555) = 0x00AA; // write data 0x00AA to device addr 0x555
*sysAddress(0x2AA) = 0x0055; // write data 0x0055 to device addr 0x2AA
*sysAddress(0x555) = 0x00A0; // write data 0x00A0 to device addr 0x555
*sysAddress(DestBuf) = *SourceBuf; // transfer the WORD to destination
ReturnStatus = Check_Toggle_Ready(DestBuf); // wait for TOGGLE bit ready
return ReturnStatus;
}
/************************************************************************/
/* PROCEDURE: Program_One_Sector */
/* */
/* This procedure can be used to program a total of 2048 words of data */
/* to the SST39VF640X. */
/* */
/* NOTES: 1. It is necessary to first erase the sector before the */
/* programming. */
/* 2. This sample code assumes the destination address passed */
/* from the calling function is the starting address of the */
/* sector. */
/* */
/* Input: */
/* Src SOURCE address containing the data which will be */
/* written to the 39VF640XB */
/* Dst DESTINATION address which will be written with the */
/* data passed in from Src */
/* */
/* Output: */
/* return TRUE: indicates success in sector-program */
/* return FALSE: indicates failure in sector-program */
/************************************************************************/
int Program_One_Sector (WORD *Src, Uint32 Dst)
{
WORD *SourceBuf;
Uint32 DestBuf;
int Index, ReturnStatus;
SourceBuf = Src;
DestBuf = Dst;
ReturnStatus = Erase_One_Sector(DestBuf); // erase the sector first
if (!ReturnStatus)
return ReturnStatus;
for (Index = 0; Index < SECTOR_SIZE; Index++)
{ // transfer data from source to destination
ReturnStatus = Program_One_Word( SourceBuf, DestBuf);
++DestBuf;
++SourceBuf;
if (!ReturnStatus)
return ReturnStatus;
}
return ReturnStatus;
}
/************************************************************************/
/* PROCEDURE: Program_One_Block */
/* */
/* This procedure can be used to program a total of 32k words of data */
/* to the SST39VF640XB. */
/* */
/* NOTES: 1. It is necessary to first erase the block before the */
/* programming. */
/* 2. This sample code assumes the destination address passed */
/* from the calling function is the starting address of the */
/* block. */
/* */
/* Input: */
/* Src SOURCE address containing the data which will be */
/* written to the 39VF640X */
/* Dst DESTINATION address which will be written with the */
/* data passed in from Src */
/* */
/* Output: */
/* return TRUE: indicates success in block-program */
/* return FALSE: indicates failure in block-program */
/************************************************************************/
int Program_One_Block (WORD *Src, Uint32 Dst)
{
WORD *SourceBuf;
Uint32 DestBuf;
int Index, ReturnStatus;
SourceBuf = Src;
DestBuf = Dst;
ReturnStatus = Erase_One_Block(DestBuf); // erase the block first
if (!ReturnStatus)
return ReturnStatus;
for (Index = 0; Index < BLOCK_SIZE; Index++)
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