Writing a nonvolatile memory to programmed levels

Patent metadata

Field	Value
Publication number	US-11433664-B2
Application number	US-201916770911-A
Country	US
Kind code	B2
Filing date	Feb 6, 2019
Priority date	Feb 6, 2019
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

In some examples, a fluid dispensing device component includes an input to receive a control signal from the fluid dispensing system, the control signal for activating the fluidic actuators of the fluid dispensing device during a fluidic operation mode. The fluid dispensing device component includes a nonvolatile memory, and a controller to, during a memory write mode, write a first portion of the nonvolatile memory to a first programmed level responsive to the control signal being activated for a first time duration, and write a second portion of the nonvolatile memory to a second programmed level responsive to the control signal being activated for a second time duration different from the first time duration, the second programmed level being different from the first programmed level.

First claim

What is claimed is:

1. A fluid dispensing device component comprising:
an input to receive a control signal from a fluid dispensing system, the control signal when activated delivering a signal pulse for activating fluidic actuators of a fluid dispensing device during a fluidic operation mode;
a nonvolatile memory; and
a controller to, during a memory write mode:
write a first portion of the nonvolatile memory to a first programmed level responsive to the control signal being activated for a first time duration, and
write a second portion of the nonvolatile memory to a second programmed level responsive to the control signal being activated for a second time duration different from the first time duration, the second programmed level being different from the first programmed level.

2. The fluid dispensing device component of claim 1 , wherein the controller is to, during the memory write mode, write at least one further portion of the nonvolatile memory to at least one corresponding further programmed level responsive to the control signal being activated for at least one corresponding further time duration different from the first and second time durations, the at least one further programmed level being different from the first and second programmed levels.

3. The fluid dispensing device component of claim 1 , further comprising the fluidic actuators.

4. The fluid dispensing device component of claim 1 , wherein the controller is to, in response to first mode control information received at a data input of the fluid dispensing device component, set the fluidic operation mode of the fluid dispensing device to control activation of the fluidic actuators using the control signal, and the controller is to, in response to different second mode control information received at the data input of the fluid dispensing device component, set the memory write mode of the fluid dispensing device different from the fluidic operation mode to control writing of the nonvolatile memory using the control signal.

5. The fluid dispensing device component of claim 4 , wherein the control signal comprises a fire signal that when activated causes the fluidic actuators to dispense fluid through orifices of the fluid dispensing device during the fluidic operation mode.

6. The fluid dispensing device component of claim 1 , wherein the controller is to set the memory write mode of the fluid dispensing device responsive to a configuration register access.

7. The fluid dispensing device component of claim 1 , wherein the nonvolatile memory comprises memory cells with floating gates.

8. The fluid dispensing device component of claim 1 , further comprising:
an output accessible by the fluid dispensing system, the output coupled to the nonvolatile memory and to provide data from the nonvolatile memory during a read operation of the nonvolatile memory.

9. The fluid dispensing device component of claim 8 , wherein the data provided by the output from the nonvolatile memory is an analog value.

10. The fluid dispensing device component of claim 8 , wherein the read operation is responsive to activation of the control signal.

11. The fluid dispensing device component of claim 1 , wherein the controller is to, in response to a first value at a mode input of the fluid dispensing device component, set the fluid operation mode of the fluid dispensing device to control activation of the fluidic actuators using the control signal, and the controller is to, in response to a different second value at the mode input of the fluid dispensing device component, set the memory write mode of the fluid dispensing device to control writing of the nonvolatile memory using the control signal.

12. The fluid dispensing device component of claim 1 , wherein the controller is to further write additional programmed levels to respective portions of the nonvolatile memory in response to different programming voltages applied to the nonvolatile memory.

13. The fluid dispensing device component of claim 12 , further comprising a memory voltage generator to generate the different programming voltages responsive to different input voltages received at the fluid dispensing device component.

14. The fluid dispensing device component of claim 12 , further comprising a memory voltage generator to generate the different programming voltages responsive to the fluid dispensing device being set to corresponding different memory write modes.

15. A fluid dispensing system comprising:
a support structure to receive a fluid dispensing device comprising a nonvolatile memory and an input to receive a fire signal; and
a controller to:
set the fluid dispensing device to a memory write mode;
after setting the fluid dispensing device to the memory write mode:
activate the fire signal for a first time duration to write a first portion of the nonvolatile memory to a first programmed level, and
activate the fire signal for a second time duration to write a second portion of the nonvolatile memory to a second programmed level, the second time duration being different from the first time duration, and the second programmed level being different from the first programmed level;

set the fluid dispensing device to a fluidic operation mode; and
after setting the fluid dispensing device to the fluidic operation mode:
activate the fire signal to deliver a signal pulse that causes activation of fluidic actuators in the fluid dispensing device to dispense fluid.

16. The fluid dispensing system of claim 15 , wherein the controller is to further:
read data of the nonvolatile memory at an output of the fluid dispensing device.

17. The fluid dispensing system of claim 15 , wherein the controller is to set the fluid dispensing device to the memory write mode based on providing a first input to the fluid dispensing device during a configuration operation of the fluid dispensing device, and the controller is to set the fluid dispensing device to the fluidic operation mode based on providing a second input to the fluid dispensing device during the configuration operation of the fluid dispensing device, the second input different from the first input.

18. The fluid dispensing system of claim 17 , wherein the first input comprises one of first mode control information provided to a data input of the fluid dispensing device, or a first value provided to a mode input of the fluid dispensing device, and
wherein the second input comprises one of second mode control information provided to the data input of the fluid dispensing device, or a second value provided to the mode input of the fluid dispensing device.

19. A method comprising:
setting a fluid dispensing device to a fluidic operation mode based on a first input received by the fluid dispensing device during a configuration operation of the fluid dispensing device;
while the fluid dispensing device is set to the fluidic operation mode, receiving an activation signal pulse delivered by an activation of a control signal at an input of the fluid dispensing device to activate fluidic actuators of the fluid dispensing device;
setting the fluid dispensing device to a memory write mode based on a second input received by the fluid dispensing device during the configuration operation of the fluid dispensing device, the second input being different from the first input; and
while the fluid dispensing device is set to the memory write mode:
writing a first portion of a nonvolatile memory of the fluid dispensing device to a first programmed level responsive to the control signal b

Assignees

• Hewlett Packard Development Co

Inventors

• Gardner James Michael
• Fisher Berkeley
• Linn Scott A

Classifications

• B41J2/04591 Primary

  Width of the driving signal being adjusted · CPC title

• B41J2/04586

  controlling heads of a type not covered by groups B41J2/04575 - B41J2/04585, or of an undefined type · CPC title

• B41J2/04541 Primary

  Specific driving circuit · CPC title

• B41J2/0458

  controlling heads based on heating elements forming bubbles · CPC title

• B41J2/04551

  using several operating modes · CPC title