ZHCS894U April 2001 – July 2019 TMS320F2810 , TMS320F2811 , TMS320F2812
PRODUCTION DATA.
请参考 PDF 数据表获取器件具体的封装图。
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 |