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add node about TX on GPIO2

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This commit is contained in:
Markus Sattler 2015-11-14 12:53:27 +01:00
parent 9db650482c
commit 5192ddb8cb
1 changed files with 5 additions and 3 deletions
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8
doc/boards.md
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@ -180,6 +180,9 @@ at startup the ESP prints out the current boot mode example:
rst cause:2, boot mode:(3,6) rst cause:2, boot mode:(3,6)
``` ```
note:
- GPIO2 is used as TX output and the internal Pullup is enabled on boot.
#### rst cause #### rst cause
| Number | Description | | Number | Description |
@ -206,8 +209,7 @@ the first value respects the pin setup of the Pins 0, 2 and 15.
| 6 | 3.3V | 3.3V | 0V | SDIO | | 6 | 3.3V | 3.3V | 0V | SDIO |
| 7 | 3.3V | 3.3V | 3.3V | SDIO | | 7 | 3.3V | 3.3V | 3.3V | SDIO |
Note: note:
- number = ((GPIO15 << 2) | (GPIO0 << 1) | GPIO2);
number = ((GPIO15 << 2) | (GPIO0 << 1) | GPIO2);