JAJSHM4U April 2001 – July 2019 TMS320F2810 , TMS320F2811 , TMS320F2812
PRODUCTION DATA.
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If the XREADY signal is sampled in the synchronous mode (USEREADY = 1, READYMODE = 0), then:
1. | Lead: | LR ≥ tc(XTIM) | |
LW ≥ tc(XTIM) | |||
2. | Active: | AR ≥ 2 × tc(XTIM) | |
AW ≥ 2 × tc(XTIM) | |||
NOTE: Restriction does not include external hardware wait states. |
These requirements result in the following XTIMING register configuration restrictions (no hardware to detect illegal XTIMING configurations):
XRDLEAD | XRDACTIVE | XRDTRAIL | XWRLEAD | XWRACTIVE | XWRTRAIL | X2TIMING |
---|---|---|---|---|---|---|
≥ 1 | ≥ 2 | ≥ 0 | ≥ 1 | ≥ 2 | ≥ 0 | 0, 1 |
Examples of valid and invalid timing when using synchronous XREADY (no hardware to detect illegal XTIMING configurations):
XRDLEAD | XRDACTIVE | XRDTRAIL | XWRLEAD | XWRACTIVE | XWRTRAIL | X2TIMING | |
---|---|---|---|---|---|---|---|
Invalid | 0 | 0 | 0 | 0 | 0 | 0 | 0, 1 |
Invalid | 1 | 0 | 0 | 1 | 0 | 0 | 0, 1 |
Valid | 1 | 2 | 0 | 1 | 2 | 0 | 0, 1 |