Figure 13. Current versus Cycle Time
(mA) | 50 |
| |
|
| ||
Current | 40 |
| |
30 |
| ||
Active | 20 | Writes | |
| |||
Average |
| ||
10 | Reads | ||
| |||
| 0 |
|
50100 150 200 300 Cycle Time (ns)
Noise Considerations
The STK14D88 is a
Document Number:
STK14D88
Preventing AutoStore
The AutoStore function can be disabled by initiating an AutoStore Disable sequence. A sequence of READ operations is performed in a manner similar to the software STORE initi- ation. To initiate the AutoStore Disable sequence, the following sequence of E controlled or G controlled READ operations must be performed:
1.Read Address 0x0E38, Valid READ
2.Read Address 0x31C7, Valid READ
3.Read Address 0x03E0, Valid READ
4.Read Address 0x3C1F, Valid READ
5.Read Address 0x303F, Valid READ
6.Read Address 0x03F8, AutoStore Disable
The AutoStore can be
1.Read Address 0x0E38, Valid READ
2.Read Address 0x31C7, Valid READ
3.Read Address 0x03E0, Valid READ
4.Read Address 0x3C1F, Valid READ
5.Read Address 0x303F, Valid READ
6.Read Address 0x07F0, AutoStore Enable
If the AutoStore function is disabled or
In all cases, make sure the READ sequence is uninterrupted. For example, an interrupt that occurs in the sequence that reads the nvSRAM would abort this sequence, resulting in an error.
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