Adaptive target charge to equalize bit errors across page types

A device operable to set target charges for a storage medium, the device comprising:

• a storage medium interface for coupling the device to the storage medium;
• and
• one or more modules, the one or more modules coupled to the storage medium interface and configured to:
• perform a sequence of operations, including:
• determining a first target charge, a second target charge, and a third target charge, the first, second, and third target charges used for controlling charge distributions in cells of the storage medium when data is written to the cells;
• determining a first error indicator for lower/fast pages of the storage medium;
• determining a second error indicator for upper/slow pages of the storage medium;
• and
• adjusting the second target charge in accordance with the first error indicator and the second error indicator.

A non-transitory computer-readable storage medium storing one or more programs configured for execution by a device coupled to a storage medium, the one or more programs comprising instructions for causing the device and/or storage medium to perform a sequence of operations, including:

• determining a first target charge, a second target charge, and a third target charge, the first, second, and third target charges used for controlling charge distributions in cells of the storage medium when data is written to the cells;
• determining a first error indicator for lower/fast pages of the storage medium;
• determining a second error indicator for upper/slow pages of the storage medium;
• and
• adjusting the second target charge in accordance with the first error indicator and the second error indicator.