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--- documentation:protocols:i2c:i2c-tools_shell [2026/10/09 11:08] – [i2cdump] chris
+++ documentation:protocols:i2c:i2c-tools_shell [2026/10/09 11:11] (current) – [i2cdump] chris
@@ Line 26: / Line 26: @@
   * ''i2cbus'': One of the buses represented by the number or string name from ''i2cdetect -l''.
+  * ''-r first-last'': Limit the range of registers being accessed. Incompatible with ''s''.
   * ''address'': The address of the IC chip on the bus.
   * ''mode'': Chooses the mode to access the register as a single byte, a double byte word or a block. If not provided, defaults to single byte without PEC. Options are listed below:
@@ Line 36: / Line 37: @@
     * ''p'': Can be appended on the mode parameter (not on ''i'' and ''W'') to enable Packet Error Checking (PEC).
   * ''bank''/''bankreg'': Used on Winbond and Asus chips. ''bank'' is an integer from 0 to 7, and ''bankreg'' an integer from 0x00 to 0xff with a default of 0x4e.
+Use of ''i2cdump'' is not advised unless you have intimate knowledge of the IC you're accessing. It's very easy to corrupt stuff.
 ===== i2cget =====

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