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
56 of 76
© 2019 Dialog Semiconductor
Addr
Register
7
6
5
4
3
2
1
0
Reset
0x81
IRQ_EVENT_
ACTUATOR_
FAULT
Reserved
E_TEST_
ADC_SA
T_FAULT
Reserved
Reserved
Reserved
Reserved
Reserved
Reserve
d
0x00
0x82
IRQ_STATU
S2
STA_
ADC_SA
T
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserve
d
0x00
0x83
IRQ_MASK2
ADC_SA
T_M
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserve
d
0x00
0x84
to
0xE7
SNP_MEM_x
SNP_MEM_x<7:0> where x = 0 to 99
0x00
6.2 Register Descriptions
Table 20: CHIP_REV (0x0000)
Bit
Mode
Symbol
Description
Reset
[7:4]
RO
CHIP_REV_MINOR
Device revision code (minor)
0xB
[3:0]
RO
CHIP_REV_MAJOR
Device revision code (major)
0xA
Table 21: IRQ_EVENT1 (0x0003)
Bit
Mode
Symbol
Description
Reset
[7]
RW
E_OC_FAULT
Over-current / short-circuit fault on the OUTP or OUTN pin
(write 1 to clear)
0x0
[6]
RW
E_ACTUATOR_FAULT
Actuator fault, see Section 5.6.6
(write 1 to clear)
0x0
[5]
RW
E_WARNING
System warnings
Read IRQ_EVENT_WARNING_DIAG for warning diagnostic
(write 1 to clear)
0x0
[4]
RW
E_SEQ_FAULT
Sequence faults: SEQ_ID_FAULT, memory fault or PWM
fault
Read IRQ_EVENT_SEQ_DIAG for diagnostic information
(write 1 to clear)
0x0
[3]
RW
E_OVERTEMP_CRIT
Critical chip temperature event, chip temperature has
exceeded the critical limit of 125 °C
(write 1 to clear)
0x0
[2]
RW
E_SEQ_DONE
IRQ indicating that sequence playback from waveform
memory is complete
(write 1 to clear)
0x0
[1]
RW
E_UVLO
Under-voltage fault, supply below the UVLO threshold
Clear to attempt restart
(write 1 to clear)
0x0
[0]
RW
E_SEQ_CONTINUE
IRQ indicating that playback of a new sequence has
occurred because SEQ_CONTINUE is set to 1
(write 1 to clear)
0x0
Table 22: IRQ_EVENT_WARNING_DIAG (0x0004)
Bit
Mode
Symbol
Description
Reset
[7]
RW
E_LIM_DRIVE
IRQ indicating that playback is limited because the power
supply level is lower than the sequence target
(write 1 to E_WARNING to clear)
0x0