Datasheet
Table Of Contents
- General Description
- Key Features
- Applications
- System Diagrams
- Contents
- Figures
- Tables
- Legal
- Product Family
- 1 Terms and Definitions
- 2 Block Diagram
- 3 Pinout
- 4 Characteristics
- 5 Functional Description
- 5.1 Features Description
- Driving LRA and ERM Actuators
- Automatic LRA Resonant Frequency Tracking
- Wideband LRA Support
- I2C and PWM Input Streaming
- Low Latency I2C/GPI Wake-Up from IDLE State
- Three GPI Sequence Triggers for up to Six Independent Haptic Responses
- On-Board Waveform Memory with Amplitude, Time, and Frequency Control
- Active Acceleration and Rapid Stop for High-Fidelity Haptic Feedback
- Continuous Actuator Diagnostics and Fault Handling
- No Software Requirements with Embedded Operation
- Differential Output Drive
- Current Driven System
- Configurable EMI Suppression
- Automatic Short Circuit Protection
- Ultra-Low Power Consumption with State Retention
- Ultra-Low Latency in STANDBY State
- Supply Monitoring, Reporting, and Automatic Output Limiting
- Open- and Closed-Loop Modes
- Open-Loop Sine/Custom Wave Drive Support
- Small Solution Footprint
- Additional Features
- 5.2 Functional Modes
- 5.3 Resonant Frequency Tracking
- 5.4 Active Acceleration and Rapid Stop
- 5.5 Wideband Frequency Control
- 5.6 Device Configuration and Playback
- 5.7 Advanced Operation
- 5.7.1 Frequency Tracking
- 5.7.2 Rapid Stop
- 5.7.3 Initial Impedance Update
- 5.7.4 Amplitude PID
- 5.7.5 Wideband Operation
- 5.7.6 Custom Waveform Operation
- 5.7.7 Embedded Operation
- 5.7.8 Polarity Change Reporting for Half-Period Control in DRO Mode
- 5.7.9 Loop Filter Configuration
- 5.7.10 UVLO Threshold
- 5.7.11 Edge Rate Control
- 5.7.12 Double Output Current Range
- 5.7.13 Supply Monitoring, Reporting, and Automatic Output Limiting
- 5.7.14 BEMF Fault Limit
- 5.7.15 Increasing Impedance Detection Accuracy
- 5.7.16 Frequency Pause during Rapid Stop
- 5.7.17 Frequency Pause during Rapid Stop
- 5.7.18 Coin ERM Operation
- 5.8 Waveform Memory
- 5.9 General Data Format
- 5.10 I2C Control Interface
- 5.1 Features Description
- 6 Register Overview
- 7 Package Information
- 8 Ordering Information
- 9 Application Information
- 10 Layout Guidelines
DA7280
LRA/ERM Haptic Driver with Multiple Input Triggers,
Integrated Waveform Memory and Wideband Support
Datasheet
Revision 3.0
30-Jul-2019
CFR0011-120-00
45 of 76
© 2019 Dialog Semiconductor
5.8.3 Frame Definition
A frame consists of a collection of parameters used to define the playback of a snippet with differing
gain, time base, carrier frequency, and number of repetitions. A frame consists of up to three bytes,
its structure is shown in Figure 27. The frame parameters can be easily set up using the Dialog
SmartCanvas GUI.
● Byte 1 is mandatory. For byte 1, always set COMMAND_TYPE = 0. If set incorrectly, the device
will generate an interrupt of the type E_MEM_FAULT.
● Byte 2 is optional. When used, set COMMAND_TYPE = 1 in Byte 2.
● Byte 3 is optional, for use in wideband sequences only, and contains the frame frequency's eight
LSBs.
If COMMAND_TYPE of frame Byte 2 is set to 1 and FREQ_CMD = 1, then the Byte 3 contains drive
frequency data to enable wideband LRA support.
All frame parameters except COMMAND_TYPE, SNP_ID_L, GAIN, and TIMEBASE are optional. For
a full description, see Table 18.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Byte 1 =>
COMMAND_TYPE
= 0
GAIN [1:0]
TIMEBASE[1:0]
SNP_ID_L[2:0]
Byte 2 =>
COMMAND_TYPE
= 1
SNP_ID_LOOP[3:0]
FREQ_CMD
FREQ[8]
SNP_ID_H
Byte 3 =>
FREQ[7:0]
Figure 27: Command Structure for a Single Frame
Table 18: Bit Definitions for Frame Parameters
Byte
Number
Register Bit
Definitions
Description
1 and/or 2
COMMAND_TYPE
COMMAND_TYPE labels the byte and tells the system how to interpret the
following seven LSBs.
COMMAND_TYPE = 0 in Byte 1
COMMAND_TYPE = 1 signifies Byte 2 is present following Byte 1
1
GAIN[1:0]
Gain applied to the snippet identified by SNP_ID_L/H:
00 = 0 dB
01 = -6 dB
10 = -12 dB
11 = -18 dB
1
TIMEBASE[1:0]
The timebase length of the snippet pointed to by the snippet ID. This
register is interpreted differently depending on
FREQ_WAVEFORM_TIMEBASE:
If FREQ_WAVEFORM_TIMEBASE = 0 (default):
00 = 5.44 ms
01 = 21.76 ms
10 = 43.52 ms
11 = 87.04 ms
If FREQ_WAVEFORM_TIMEBASE = 1:
00 = 1.36 ms
01 = 5.44 ms
10 = 21.76 ms
11 = 43.52 ms