NXP Semiconductors FRDM-K28F Скачать руководство пользователя страница 17 | Manualshive

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NXP Semiconductors FRDM-K28F Скачать руководство пользователя страница 17

Push-button switches

Freedom Board for Kinetis K28F (FRDM-K28F), User's Guide, Rev. 0, 04/2017

NXP Semiconductors

17

15. Reset

The reset push-button (SW1) is connected to the reset signal on the K28F MCU through a level-shifter
(U8) and to the OpenSDA v2.2 circuit. The reset button can be used to force an external reset on the
target MCU. The reset button can also be used to force the OpenSDA v2.2 circuit into the bootloader
mode. When not using the OpenSDA v2.2 circuit to supply power, the reset signal can be connected
directly to the target MCU. For more details, see

Section 3.2, “Serial and Debug Adapter version 2

(OpenSDA v2.2)”

.

Figure 15. Reset circuit

16. Push-button switches

Two push-buttons (SW2 and SW3) are available on the FRDM-K28F board. SW2 is connected to PTA4
and SW3 is connected to PTD0. Besides the general-purpose input/output functions, SW2 can be also
used as a Low-Leakage Wakeup (LLWU) source.

Table 7. Push-button switch connections

Switch

K28F connection

SW2

PTA4/NMI_B

SW3

PTD0/LLWU_P12

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Содержание FRDM-K28F

Страница 1: ...ls The FRDM K28F hardware is form factor compatible with the Arduino R3 pin layout providing a broad range of expansion board options The on board interface includes a 6 axis digital accelerometer and...

Страница 2: ...8 V One 128 Mbit 16 MB on board mobile SDRAM memory at 3 3 V Multiple independent voltage domains VDD_CORE VDD VBAT and VDDIO_E FlexIO socket which enables you to connect an optional TFT Proto 5 CAPAC...

Страница 3: ...ware overview Freedom Board for Kinetis K28F FRDM K28F User s Guide Rev 0 04 2017 NXP Semiconductors 3 Figure 1 FRDM K28F block diagram Downloaded from Arrow com Downloaded from Arrow com Downloaded f...

Страница 4: ...on the I O header or an off board 1 71 V 3 6 V supply from the 3 3 V pin on the I O header The USB and VIN supplies are regulated on board using a 3 3 V linear regulator to produce the main power sup...

Страница 5: ...HSRUN mode No No NOTE The OpenSDA v2 2 circuit is only operational when a USB cable is connected and supplies power to the OpenSDA v2 2 USB However a protection circuitry is provided to enable multip...

Страница 6: ...is K28F FRDM K28F User s Guide Rev 0 04 2017 6 NXP Semiconductors Figure 3 Power supply schematic Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow co...

Страница 7: ...ts P3V3 Main supply for the 3 V MCU VDD and peripheral functions Supplies nominal 3 V at the J3 header P3V3 nodes Sourced from the P3V3_VREG or P3V3 inputs on the J3 I O header When the J3 P3V3 inputs...

Страница 8: ...otloader mode The SPI and GPIO signals provide an interface to either the SWD debug port or the K20 Additionally signal connections are available to implement the UART serial channel The OpenSDA v2 2...

Страница 9: ...PTC24 and PTC25 of the K28 MCU 4 MCU FRDM K28F features the MK28FN2M0VMI15 MCU This 150 MHz MCU is a part of the Kinetis K2x family and it is implemented in the 169 MAPBGA and 210 WLCSP K28 only pack...

Страница 10: ...Two 8 channel motor control general purpose PWM timers Two 2 channel quadrature decoder general purpose timers Real time clock with an independent 3 3 V power domain Programmable delay block Human mac...

Страница 11: ...ull speed low speed USB module with the on the go host device capability and a built in transceiver The FRDM K28F board routes the USB D and D signals from the MK28FN2M0VMI15 MCU to the high speed ana...

Страница 12: ...dule is powered on its own domain FRDM K28F provides a battery holder for a coin cell battery that can be used as the VBAT supply The holder supports common 20 mm diameter 3 V lithium coin cell batter...

Страница 13: ...efault the I2 C address is 0x1C pull up on SA1 and pull down on SA0 Table 4 Accelerometer and magnetometer signal connection FXOS8700Q K28F connection SCL PTC29 I2C3_SCL SDA PTC28 I2C3_SDA INT1 PTC26...

Страница 14: ...U supply voltage Table 5 LED signal connection RGB LED K28F connection RED PTE6 GREEN PTE7 BLUE PTE8 Figure 12 Accelerometer and magnetometer Downloaded from Arrow com Downloaded from Arrow com Downlo...

Страница 15: ...rates at 3 3 V The on board mobile SDRAM uses the ISSI IS42SM16800H 6BLI The SDRAM controller interface offers performance of up to 75 MHz Header J10 provides a convenient means for energy consumption...

Страница 16: ...DAT1 PTE0 ADC1_SE4A SPI1_PCS1 UART1_TX SDHC0_D1 TRACE_CLKOUT I2C1_SDA RTC_CLKOUT G1 SWITCH PTB5 S1 S4 S1 S4 Shield ground 14 FlexIO socket There is a 28 pin header with 20 FlexIO signals connected on...

Страница 17: ...2 Figure 15 Reset circuit 16 Push button switches Two push buttons SW2 and SW3 are available on the FRDM K28F board SW2 is connected to PTA4 and SW3 is connected to PTD0 Besides the general purpose i...

Страница 18: ...ensor Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded f...

Страница 19: ...ry but some are connected directly to one of the four I O headers J1 J2 J3 and J4 The pins on the K28F MCU are named after their General Purpose Input Output GPIO port pin function For example the fir...

Страница 20: ...ation J15 VDDIO_E supply 1 2 Measurement point for the K28 VDDIO_E 1 8 V power domain J16 QuadSPI supply DNP Measurement point for the QuadSPI supply shorted on board J17 SWD_CLK DNP Isolate the SWD_C...

Страница 21: ...Substantive changes 0 04 2017 Initial release Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow c...

Страница 22: ...XP does not convey any license under its patent rights nor the rights of others NXP sells products pursuant to standard terms and conditions of sale which can be found at the following address nxp com...

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