![NXP Semiconductors LPC43Sxx Скачать руководство пользователя страница 154](http://html1.mh-extra.com/html/nxp-semiconductors/lpc43sxx/lpc43sxx_user-manual_1721827154.webp)
UM10503
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
154 of 1441
NXP Semiconductors
UM10503
Chapter 11: LPC43xx/LPC43Sxx Configuration Registers (CREG)
11.4.14 Cortex-M0APP TXEV event clear register
This register captures the signal TXEV from the ARM Cortex-M0APP processor (see
).
11.4.15 ARM Cortex-M0APP memory mapping register
The reset value for this register depends on the execution of the boot loader. See
.
All memory mapped addresses must be located on a 4 kB boundary.
11.4.16 USB0 frame length adjust register
Remark:
This register is only implemented for parts with on-chip flash. See
.
The USB frame length adjust register is used to adjust any offset from the clock source
that generates the clock that drives the SOF counter. When a new value is written into
these six bits, the length of the frame is adjusted. Its initial programmed value is
system-dependent based on the accuracy of hardware USB clock. This register should
only be modified when the HCH bit in the USB STS register is one. Changing value of this
register while the host controller is operating yields undefined results.
This register should not be reprogrammed by USB system software unless the default
values are incorrect, or the system is restoring the register while returning from a
suspended state.
Remark:
The FLADJ register must be read only after initializing the USB interface.
Reading this register before initialization of the USB causes the MCU to stall.
For details on using the SOF signal, see
Table 110. Cortex-M0APP TXEV clear register (M0APPTXEVENT, address 0x4004 3400) bit
description
Bit
Symbol
Value Description
Reset
value
Access
0
TXEVCLR
Cortex-M0APP TXEV event handling.
0
R/W
0
Clear the TXEV event.
1
No effect.
31:1
-
Reserved.
-
-
Table 111. Memory mapping register (M0APPMEMMAP, address 0x4004 3404) bit description
Bit
Symbol
Description
Reset
value
Access
11:0
Reserved
0
-
31:12
M0APPMAP
Shadow address when accessing memory at
address 0x0000 0000
-
R/W