Chapter 3 Jumpers and Switches
3.2Power Supply (S2, JP: 8, 15, 16, 17, 22)
The
The LIN Vs line can be connected directly to the input supply of the board by jumpers. In this case, the input voltage to the board has to be suitable for the connected bus devices (mostly around 12V). Since there is a protection diode between Vin and Vs, it is not possible to power the board over the LIN bus.
S2 Power Switch
JP8 Core power supply stabilization capacitor
JP15 Selects the power supply voltage for the microcontroller
For
JP16 Connects the power supply voltage to the microcontroller. An ampere meter can be used instead for power consumption measurement.
JP17 Selects the Stepper Motor Driver Voltage (3.3V or 5V) JP22 Jumper to override the power switch S2
| Jumper |
| Setting |
|
| Description |
|
| JP8 |
| Closed |
| An external capacitor is connected | ||
|
| Open |
| An external capacitor is not connected | |||
|
|
|
| ||||
|
|
|
|
|
|
| |
| JP15 *1 | 1 - 2 |
|
| Power supply (VCC) for MCU is set to 5V | ||
|
|
| (Not allowed for | ||||
| (MCUVCC) |
|
|
|
|
|
|
| 2 - 3 |
|
| Power supply (VCC) for MCU is set to 3V3 | |||
|
|
|
| ||||
| JP16 | 1 - 2 |
|
| MCU is disconnected from VCC | ||
| (MCUVCC) | 2 - 3 |
|
| MCU is connected to VCC | ||
|
|
|
| ||||
| JP17 | 1 - 2 |
|
| SMC (DVCC) supply voltage is set to 5V | ||
| (DVCC) | 2 - 3 |
|
| SMC (DVCC) supply voltage is set to 3.3V | ||
|
|
|
| ||||
| JP22 |
| Closed |
| Board is always switched on | ||
| (Mains) |
| Open |
|
| Board power is controlled by switch S2 |
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
Table 3-2: Power Supply Configuration
By default, all Board supplies are set to 3.3V.
*1 For
© Fujitsu Microelectronics Europe GmbH | - 15 - |