对于能量采集（Energy Harvesting）应用来说，最适合的能量模式通常是 EM2 和 EM4。这些模式能让 EFR32xG22E 在空闲时消耗最小的功耗：
-
EM2 模式：保留 RAM 中的数据
使用低频振荡器（LFXO 或 ULFRCO）的低功耗外设仍可保持运行
（包括 LETIMER、I2C、EUART 等）
适用于设备需要频繁唤醒或需在低能耗下维持上下文状态的场景 -
EM4 模式：所有能量模式中功耗最低
普通 RAM 不保留，但可以保留 128 字节的备用 RAM（BURAM）
非常适合设备长时间处于休眠状态的应用
唤醒所需能量和时间较多，需重新初始化系统
当唤醒频率很低且对极低功耗要求极高时，应优先使用 EM4
选择合适的能量模式取决于：设备唤醒的频率, 以及可用的能量资源
相关型号
| DigiKey 型号 | 原厂型号 |
|---|---|
| 336-SLWSTK6021A-ND | SLWSTK6021A |
| 336-SLWRB4183A-ND | SLWRB4183A |
| 336-XG27-DK2602A-ND | XG27-DK2602A |
| 336-XG21-PK6026A-ND | XG21-PK6026A |
| 336-XG27-PK6017A-ND | XG27-PK6017A |
| 336-SLWRB4182A-ND | SLWRB4182A |
| 336-SLWRB4181C-ND | SLWRB4181C |
| 336-SLWRB4181B-ND | SLWRB4181B |
| 336-XG26-PK6028A-ND | XG26-PK6028A |
| 336-XG22-EK2710A-ND | XG22-EK2710A |
| 336-XG27-RB4194A-ND | XG27-RB4194A |
| 336-XG24-RB4187C-ND | XG24-RB4187C |
| 336-XG24-RB4186C-ND | XG24-RB4186C |
| 336-XG24-RB4198A-ND | XG24-RB4198A |
| 336-XG21-PK6027A-ND | XG21-PK6027A |
| 336-XG24-PK6036A-ND | XG24-PK6036A |
| 336-XG24-RB4188A-ND | XG24-RB4188A |
| 336-XG21-RB4196B-ND | XG21-RB4196B |
| 336-XG21-RB4195B-ND | XG21-RB4195B |
| 336-XG26-RB4118A-ND | XG26-RB4118A |
| 336-BG27-RB4110B-ND | BG27-RB4110B |
| 336-BG27-RB4111B-ND | BG27-RB4111B |
| 336-XG24-RB4115B-ND | XG24-RB4115B |
| 336-XG27-PK6018A-ND | XG27-PK6018A |
| 336-XG27-PK6019A-ND | XG27-PK6019A |
| 336-XG24-DK2606A-ND | XG24-DK2606A |
| 336-SLWRB4180B-ND | SLWRB4180B |
| 336-XG22-RB4415A-ND | XG22-RB4415A |
| 336-XG22-EK8200A-ND | |
| XG22-EK8200A | |
| 336-XG22-EK8200A |
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