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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.fsl-ddr | 52 | ||||
| -rw-r--r-- | doc/README.p1_p2_rdb_pc | 46 |
2 files changed, 98 insertions, 0 deletions
diff --git a/doc/README.fsl-ddr b/doc/README.fsl-ddr index c1ee0a6..abfb7f1 100644 --- a/doc/README.fsl-ddr +++ b/doc/README.fsl-ddr @@ -170,3 +170,55 @@ Single slot system Reference http://www.xrosstalkmag.com/mag_issues/xrosstalk_oct08_final.pdf http://download.micron.com/pdf/technotes/ddr3/tn4108_ddr3_design_guide.pdf + + +Table for ODT for DDR2 +====================== +Two slots system ++-----------------------+----------+---------------+-----------------------------+-----------------------------+ +| Configuration | |DRAM controller| Slot 1 | Slot 2 | ++-----------+-----------+----------+-------+-------+--------------+--------------+--------------+--------------+ +| | | | | | Rank 1 | Rank 2 | Rank 1 | Rank 2 | ++ Slot 1 | Slot 2 |Write/Read| Write | Read |-------+------+-------+------+-------+------+-------+------+ +| | | | | | Write | Read | Write | Read | Write | Read | Write | Read | ++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 1 | off | 150 | off | off | off | off | 75 | 75 | off | off | +| Dual Rank | Dual Rank |----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 2 | off | 150 | 75 | 75 | off | off | off | off | off | off | ++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 1 | off | 150 | off | off | off | off | 75 | 75 | | | +| Dual Rank |Single Rank|----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 2 | off | 150 | 75 | 75 | off | off | off | off | | | ++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 1 | off | 150 | off | off | | | 75 | 75 | off | off | +|Single Rank| Dual Rank |----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 2 | off | 150 | 75 | 75 | | | off | off | off | off | ++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 1 | off | 150 | off | off | | | 75 | 75 | | | +|Single Rank|Single Rank|----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 2 | off | 150 | 75 | 75 | | | off | off | | | ++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| Dual Rank | Empty | Slot 1 | off | 75 | 150 | off | off | off | | | | | ++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| Empty | Dual Rank | Slot 2 | off | 75 | | | | | 150 | off | off | off | ++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +|Single Rank| Empty | Slot 1 | off | 75 | 150 | off | | | | | | | ++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| Empty |Single Rank| Slot 2 | off | 75 | | | | | 150 | off | | | ++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+ + +Single slot system ++-------------+------------+---------------+-----------------------------+ +| | |DRAM controller| Rank 1 | Rank 2 | +|Configuration| Write/Read |-------+-------+-------+------+-------+------+ +| | | Write | Read | Write | Read | Write | Read | ++-------------+------------+-------+-------+-------+------+-------+------+ +| | R1 | off | 75 | 150 | off | off | off | +| Dual Rank |------------+-------+-------+-------+------+-------+------+ +| | R2 | off | 75 | 150 | off | off | off | ++-------------+------------+-------+-------+-------+------+-------+------+ +| Single Rank | R1 | off | 75 | 150 | off | ++-------------+------------+-------+-------+-------+------+ + +Reference http://www.samsung.com/global/business/semiconductor/products/dram/downloads/applicationnote/ddr2_odt_control_200603.pdf + diff --git a/doc/README.p1_p2_rdb_pc b/doc/README.p1_p2_rdb_pc new file mode 100644 index 0000000..4437731 --- /dev/null +++ b/doc/README.p1_p2_rdb_pc @@ -0,0 +1,46 @@ +Overview +-------- +P1_P2_RDB_PC represents a set of boards including + P1020MSBG-PC + P1020RDB-PC + P1020UTM-PC + P1021RDB-PC + P1024RDB + P1025RDB + P2020RDB-PC + +They have similar design of P1020RDB but have DDR3 instead of DDR2. P2020RDB-PC +has 64-bit DDR. All others have 32-bit DDR. + +Key features on these boards include: + * DDR3 + * NOR flash + * NAND flash (on RDB's only) + * SPI flash (on RDB's only) + * SDHC/MMC card slot + * VSC7385 Ethernet switch (on P1020MBG, P1020RDB, & P1021RDB) + * PCIE slot and mini-PCIE slots + +As these boards use soldered DDR chips not regular DIMMs, an on-board EEPROM +is used to store SPD data. In case of absent or corrupted SPD, falling back +to timing data embedded in the source code will be used. Raw timing data is +extracted from DDR chip datasheet. Different speeds of DDR are supported with +this approach. ODT option is forced to fit this set of boards, again because +they don't have regular DIMMs. + +CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS is defined as 5ms to meet specification +for writing timing. + +VSC firmware Address is defined by default in config file for eTSEC1. + +SD width is based off DIP switch. DIP switch is detected on the +board by reading i2c bus and setting the appropriate mux values. + +Some boards have QE module in the silicon (P1021 and P1025). QE and eLBC have +pins multiplexing. QE function needs to be disabled to access Nor Flash and +CPLD. QE-UEC and QE-UART can be enabled for linux kernel by setting "qe" +in hwconfig. In addition, QE-UEC and QE-TDM also have pins multiplexing, to +enable QE-TDM for linux kernel, set "qe;tdm" in hwconfig. Syntax is as below + +'setenv hwconfig qe' to enable QE UEC/UART and disable Nor-Flash/CPLD. +'setenv hwconfig 'qe;tdm'' to enalbe QE TDM and disable Nor-Flash/CPLD. |