GigaDevice GD32H77
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The GigaDevice GD32H77 are 32-bit general-purpose microcontrollers based on the Arm® Cortex®-M7 processor.
Supported devices
Refer to the supported device list for a full list of all supported GD32H77 family devices, their corresponding names and connection diagrams.
Target interfaces
| Interface | J-Link support | Flasher support |
|---|---|---|
| SWD |  |
|
Flash Banks
Internal Flash
| Flash bank | Base address | J-Link support | Flasher support | Loader | |
|---|---|---|---|---|---|
| Name | Bank size | ||||
| eNVM | 0x08000000 | |
|
Default | Up to 2 MB |
| Internal Flash | 0x08200000 | |
|
Default | Up to 7.5 MB |
RAM
- GD32H77 devices have ECC RAM which can be disabled. However, a connect to GD32H77 devices will initialize 16KB at 0x30000000. For more information, refer to the ECC article.
Watchdog Handling
- The device has two watchdogs: a Free Watchdog Timer (FWDGT) and a Window Watchdog Timer (WWDGT).
- The FWDGT is fed during programming if it is enabled.
- The WWDGT is fed during programming if it is enabled and its counter value is below its window value.
Device Specific Handling
Connect
- During target connection, the security protection level is verified. If the device is configured with protection level low (NVMC_OBSTAT0_EFT.SPC), the user is prompted to unsecure the device before proceeding.
- A successful connection is only possible to an unsecured device.
Reset
- The device uses normal Cortex-M reset, no special handling necessary, like described here.
Attach
Attach is a debugging feature which exclusively applies to J-Link and J-Trace and does not apply to Flasher.
- Attach is supported / desired