Chip-Specific Information; Introduction - NXP Semiconductors MKL27Z128VFM4 Reference Manual

Chapter 13
Kinetis ROM Bootloader

13.1 Chip-Specific Information

This device has various peripherals (UART, I2C, SPI , USB) supported by the Kinetis
ROM Bootloader. To use an interface for bootloader communications, the peripheral
must be enabled in the BCA, as shown in
0xFF bytes), then all peripherals will be enabled by default.The next table shows the pads
used by the Kinetis ROM Bootloader.
Port
PTA2
PTA1
PTB0
PTB1
PTC4
PTC7
PTC6
PTC5
USB0_DP
USB0_DM

13.2 Introduction

The Kinetis bootloader is the program residing in the on-chip read-only memory (ROM)
of a Kinetis microcontroller device. There is hardware logic in place at boot time that
either starts execution of an embedded image available on the internal flash memory, or
starts the execution of the Kinetis Bootloader from on-chip ROM.
Freescale Semiconductor, Inc.
Table 13-1. Kinetis Bootloader Peripheral Pinmux
Signal
LPUART0_TX
LPUART0_RX
I2C0_SCL
I2C0_SDA
SPI0_SS_b
SPI0_MISO
SPI0_MOSI
SPI0_SCK
USB0_DP
USB0_DM
KL27 Sub-Family Reference Manual , Rev. 5, 01/2016
Table 13-3. If the BCA is invalid (such as all
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