| LPDDR SDRAM |
|
| ||
| Signal Name | FPGA IO | Comment |
|
|
| MCB1_RAS_n | K15 |
|
|
|
| MCB1_CAS_n | K16 | Command inputs: RAS#, CAS#, and WE# (along with CS#) define |
| |
| MCB1_WE_n | K12 | the command being entered. * |
|
|
| MCB1_CS_n |
|
|
| |
| MCB1_CKE_n | D17 | Clock enable: CKE HIGH activates, and CKE LOW deactivates, the |
| |
|
|
| internal clock signals, input buffers, and output drivers. Taking CKE |
| |
|
|
| LOW enables PRECHARGE |
|
|
|
|
| operations (all banks idle), or ACTIVE |
| |
|
|
| bank). CKE is synchronous for all functions except SELF REFRESH |
| |
|
|
| exit. All input buffers (except CKE) are disabled during |
| |
|
|
| and self refresh modes. |
|
|
| MCB1_RZQ | N14 | Input termination calibration pin used with the soft calibration module. |
| |
|
|
| External 100 Ohm resistor to GND. |
|
|
| MCB1_ZIO |
| No connect signal used with the soft calibration module to calibrate |
| |
|
|
| the input termination value. |
|
|
| MCB1_CK | G16 | Clock: CK is the system clock input. CK and CK# are differential |
|
|
|
|
| clock inputs. All address and control input signals are sampled on the |
| |
| MCB1_CK_n | G18 | crossing of the positive edge of CK and the negative edge of CK#. |
| |
| Input and output data is referenced to the crossing of CK and CK# |
| |||
|
|
|
| ||
|
|
| (both directions of the crossing). |
|
|
| MCB1_DQ0 | M16 |
|
|
|
| MCB1_DQ1 | M18 |
|
|
|
| MCB1_DQ2 | L17 |
|
|
|
| MCB1_DQ3 | L18 | Data input/output: Lower Byte Data bus. |
|
|
| MCB1_DQ4 | H17 |
|
| |
|
|
|
| ||
| MCB1_DQ5 | H18 |
|
|
|
| MCB1_DQ6 | J16 |
|
|
|
| MCB1_DQ7 | J18 |
|
|
|
| MCB1_LDQS | K17 | Data strobe for Lower Byte Data bus: Output with read data, input |
| |
|
|
| with write data. DQS is |
| |
|
|
| write data. It is used to capture data. |
|
|
| MCB1_LDM | L16 | Input data mask: DM is an input mask signal for write data. Input data |
| |
|
|
| is masked when DM is sampled HIGH along with that input data |
|
|
| MCB1_UDM | L15 | during a WRITE access. DM is sampled on both edges of DQS. |
|
|
|
|
|
| ||
| MCB1_DQ8 | N17 | Data input/output: Upper Byte Data bus. |
|
|
| MCB1_DQ9 | N18 |
|
|
|
| MCB1_DQ10 | P17 |
|
|
|
| MCB1_DQ11 | P18 |
|
|
|
|
|
|
|
| |
USBS6 / |
| http://www.cesys.com/ | |||
User Doc V0.3 |
| preliminary |