Customizing an I2C slave address is also supported. This feature is enabled if the
Bootloader Configuration Area (BCA) (shown in
) is enabled (tag field is
filled with ‘kcfg’) and the i2cSlaveAddress field is filled with a value other than 0xFF.
0x10 is used as the default I2C slave address.
The maximum supported I2C baud rate depends on corresponding clock configuration
field in the BCA. Typical supported baud rate is 400 kbps with factory settings. Actual
supported baud rate may be lower or higher than 400 kbps, depending on the actual value
of the clockFlags and the clockDivider fields.
Because the I2C peripheral serves as an I2C slave device, each transfer should be started
by the host, and each outgoing packet should be fetched by the host.
• An incoming packet is sent by the host with a selected I2C slave address and the
direction bit is set as write.
• An outgoing packet is read by the host with a selected I2C slave address and the
direction bit is set as read.
• 0x00 will be sent as the response to host if the target is busy with processing or
preparing data.
The following flow charts demonstrate the communication flow of how the host reads
ping packet, ACK and response from the target.
Fetch
Ping response
Yes
Yes
End
Report Error
No
No
Read 1 byte
from target
0x5A
received?
packet
Read leftover bytes
of ping response
0x7A
received?
Read 1 byte
from target
Figure 22-14. Host reads ping response from target via I2C
Chapter 22 Kinetis ROM Bootloader
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
NXP Semiconductors
519
Содержание Kinetis KE1xZ256
Страница 2: ...Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 2 NXP Semiconductors...
Страница 56: ...SysTick Clock Configuration Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 56 NXP Semiconductors...
Страница 62: ...Interrupt channel assignments Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 62 NXP Semiconductors...
Страница 124: ...Application information Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 124 NXP Semiconductors...
Страница 130: ...Initialization application information Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 130 NXP Semiconductors...
Страница 178: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 178 NXP Semiconductors...
Страница 356: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 356 NXP Semiconductors...
Страница 368: ...Module clocks Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 368 NXP Semiconductors...
Страница 410: ...Interrupts Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 410 NXP Semiconductors...
Страница 562: ...Power supply supervisor Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 562 NXP Semiconductors...
Страница 592: ...General security features Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 592 NXP Semiconductors...
Страница 604: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 604 NXP Semiconductors...
Страница 622: ...Application Information Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 622 NXP Semiconductors...
Страница 634: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 634 NXP Semiconductors...
Страница 674: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 674 NXP Semiconductors...
Страница 690: ...Module Signal Description Tables Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 690 NXP Semiconductors...
Страница 712: ...Functional description Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 712 NXP Semiconductors...
Страница 820: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 820 NXP Semiconductors...
Страница 1030: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1030 NXP Semiconductors...
Страница 1052: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1052 NXP Semiconductors...
Страница 1066: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1066 NXP Semiconductors...
Страница 1268: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1268 NXP Semiconductors...
Страница 1314: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1314 NXP Semiconductors...
Страница 1316: ...Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1316 NXP Semiconductors...