3.3.22. Four Activate Window Timing Register

The t_faw Register characteristics are:

Purpose

Controls the four bank activate time in memory clock cycles, see Figure 2.16.

Usage constraints

Only accessible in Config or Low_power state.

Configurations

Available in all configurations of the DDR2 DMC.

Attributes

See the register summary in Table 3.1.

Figure 3.29 shows the t_faw Register bit assignments.

Figure 3.29. t_faw Register bit assignments

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Table 3.23 shows the t_faw Register bit assignments.

Table 3.23. t_faw Register bit assignments

BitsNameFunction
[31:13]-Read undefined, write as zero.
[12:8]schedule_fawt_faw in aclk clock cycles, minus 3. Used as a scheduler delay. Supported values are 0-31.
[7:5]-Read undefined, write as zero.
[4:0]t_fawSets tFAW, the four-bank activate period in memory clock cycles. Supported values are 1-31.

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