STMicroelectronics B-G474E-DPOW1, Руководство пользователя

Страница: 43 / 54

SB name
Status
(1) Function Comment
SB31
ON
Power 3V3_STLK from 5V_USBPD
Power 3V3_STLK from 5V_USBPD when USB Type-
C
®
is plugged
OFF
No power on 3V3_STLK from 5V_USBPD when USB
Type-C
®
is plugged
SB32
ON
LTC3114-1 Automatic Burst /PWM Mode
control
Automatic Burst/PWM Mode is activated
OFF RESERVED
SB33
ON
PC2 connection to USBPD_VIN
Connect PC2 to USBPD_VIN
OFF
Isolate PC2 from USBPD_VIN, PC2 can be used for
any other applications at the CN9 extension connector.
SB34
ON
PF1 connection to extension HSE CLK
footprint (OSC_IN)
Connect PF1 to HSE CLK footprint
OFF Isolate PF1 from HSE CLK footprint
SB35
ON
PF0 connection to HSE CLK footprint
(OSC_OUT)
Connect PF0 to HSE CLK footprint
OFF Isolate PF0 from HSE CLK footprint
SB36
ON
PF0 connection to MCO of ST-LINKV3E
Connect PF0 to MCO of STL-LINK/V3E
OFF Isolate PF0 from MCO of STL-LINK/V3E
SB37
ON
VREF power voltage reference choice
VREF is set at 2.5 V. Remove R138.
OFF VREF is set at 3.25 V
SB38
ON
5V connection to 5V_OUT
Connect 5V to 5V_OUT on the CN9 extension
connector
OFF
5V_OUT is not powered on the CN9 extension
connector.
1. Default configuration in bold
UM2577
Solder bridges
UM2577 - Rev 2
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