35.7.5 MPDDRC Timing Parameter 1 Register
This register can only be written if the WPEN bit is cleared in the MPDDRC Write Protection Mode Register.
| Name: | MPDDRC_TPR1 |
| Offset: | 0x10 |
| Reset: | 0x03C80808 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| TXP[3:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | |||||
| Reset | 0 | 0 | 1 | 1 | |||||
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| TXSRD[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| TXSNR[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| TRFC[6:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | ||
| Reset | 0 | 0 | 0 | 1 | 0 | 0 | 0 | ||
Bits 27:24 – TXP[3:0] Exit Power-down Delay to First Command
This field defines the delay between CKE set high and a valid command in number of DDRCK clock cycles. The number of cycles is between 0 and 15.
Bits 23:16 – TXSRD[7:0] Exit Self-refresh Delay to Read Command
This field defines the delay between CKE set high and a Read command in number of DDRCK clock cycles. The number of cycles is between 0 and 255.
This field is found only in DDR2-SDRAM and DDR3-SDRAM devices.
In case of DDR3-SDRAM, this field is equivalent to tXSDLL. In DLL Off mode, this timing is not used. The field must be set to 0.
Bits 15:8 – TXSNR[7:0] Exit Self-refresh Delay to Non-Read Command
This field defines the delay between CKE set high and a Non Read command in number of DDRCK clock cycles. The number of cycles is between 0 and 255. This field is used by the DDR-SDRAM devices. In case of low-power DDR-SDRAM, this field is equivalent to tXSR. In case of DDR3-SDRAM, this field is equivalent to tXS.
Bits 6:0 – TRFC[6:0] Row Refresh Cycle
This field defines the delay between a Refresh command or a Refresh and Activate command in number of DDRCK clock cycles. The number of cycles is between 0 and 127.
In case of low-power DDR2-SDRAM and low-power DDR3-SDRAM, this field is equivalent to tRFCab. If the user enables the function “Refresh Per Bank” (see “REF_PB: Refresh Per Bank”), this field is equivalent to tRFCpb.