DA7282 datasheet(40/75 Pages) RENESAS

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LRA/ERM Ultra-Low Power Haptic Driver with Multiple Input Triggers and Integrated Waveform Memory

R15DS0041EE0330 Rev.3.30

June 16, 2026

CFR0011-120-00

Page 40

Recommended setup specific for a coin ERM, in addition to generic ERM setup described in Section 6.6.2:

▪ ACCELERATION_EN = 0

▪ RAPID_STOP_EN = 0

▪ AMP_PID_EN = 0

▪ V2I_FACTOR_FREEZE = 1

▪ CALIB_IMPEDANCE_DIS = 1

▪ BEMF_FAULT_LIM = 0

▪ Set the V2I factor using the single winding impedance, see Section 6.6.2

▪ Set IMAX using the maximum start-up current, see Section 6.6.2

6.7.19 VDDIO Pin Control

The VDDIO pin controls the entry and exit of the device from OFF state. When VDDIO = 0 V, DA7282 is OFF and

consumes typ. 5 nA of current from the VDD pin. Setting VDDIO = VDDIO (the system supply level) enables the

device and, after the initial boot sequence, it will reach IDLE state with typ. 680 nA of current consumption. Note

that the device will have been hardware reset when it comes out of the OFF mode.

For lowest OFF mode current consumption control the enable function via a host-side GPIO push-pull that

connects the VDDIO pin either to GND or to the system VDDIO supply.

If the VDDIO pin is only needed as a device hardware reset, where it will only be pulled low for a short time

(therefore IDLE state power consumption is not an issue), a possible system solution is to use an open-drain

output with a pull-up resistor to the system VDDIO supply. In this configuration a larger pull-up resistor might

require an additional capacitor.

For recommended configurations and component values for the two examples, see Figure 24 and Table 17.

Host

GPIO

Driver

DA7282

GPIO

system VDDIO supply

GND

VDDIO/EN

Host

GPIO

Driver

DA7282

GPIO

system VDDIO supply

GND

VDDIO/EN

Open Drain GPIO

(for hardware reset function only)

Push-Pull GPIO

(for best OFF mode current consumption)

Figure 24. VDDIO pin control in push-pull configuration and open drain configuration

Table 17. VDDIO pin control recommended values of R and C

Pullup resistor R (kΩ)

Decoupling capacitor C (pF)

< 200

None

0.2 to 2.2

100

2.2 to 10

1000

DA7282 Datasheet(PDF) 40 Page - Renesas Technology Corp

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