SLM770A Module Hardware Design Manual
MeiG Smart Technology Co., Ltd 77/77
The following figure shows the STATUS reference circuit design:
Figure 21 STATUS reference circuit
3.15 USB_BOOT Interface
The SLM770A supports USB_BOOT. The USB_BOOT function requires that the USB_BOOT pin be
pulled up to 1.8V before the module VDD_EXT is powered on, and the module will enter the emergency
download mode when it is powered on. In this mode, the module can be upgraded through the USB
interface.
Table 20 USB_BOOT pin definition
Emergency download mode
control, high level in effect
1.8V power domain. It is
recommended to reserve test
points. If unused, keep it open.
The USB_BOOT interface reference circuit is as follows:
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