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F87EHHD 参数 Datasheet PDF下载

F87EHHD图片预览
型号: F87EHHD
PDF下载: 下载PDF文件 查看货源
内容描述: [FXTH87E, Family of Tire Pressure Monitor Sensors]
分类和应用:
文件页数/大小: 183 页 / 1700 K
品牌: NXP [ NXP ]
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NXP Semiconductors  
FXTH87E  
FXTH87E, Family of Tire Pressure Monitor Sensors  
from internal memory following a reset with execution beginning at address specified by  
the reset pseudo-vector ($DFFE and $DFFF).  
5.3 WAIT mode  
The WAIT mode is also present like other members of the NXP S08 family members; but  
is not normally used by the FXTH87E firmware or typical TPMS applications.  
5.4 ACTIVE BACKGROUND mode  
The ACTIVE BACKGROUND mode functions are managed through the BACKGROUND  
DEBUG controller (BDC) in the HCS08 core. The BDC provides the means for analyzing  
MCU operation during software development.  
ACTIVE BACKGROUND mode is entered in any of four ways:  
When the BKGD/PTA4 pin is low at the rising edge of a power up reset  
When a BACKGROUND command is received through the BKGD/PTA4 pin  
When a BGND instruction is executed by the CPU  
When encountering a BDC breakpoint  
Once in ACTIVE BACKGROUND mode, the CPU is held in a suspended state waiting  
for serial BACKGROUND commands rather than executing instructions from the user’s  
application program. Background commands are of two types:  
Non-intrusive commands, defined as commands that can be issued while the user  
program is running. Non-intrusive commands can be issued through the BKGD/PTA4  
pin while the MCU is in RUN mode; non-intrusive commands can also be executed  
when the MCU is in the ACTIVE BACKGROUND mode. Non-intrusive commands  
include:  
Memory access commands  
Memory-access-with-status commands  
BDC register access commands  
The BACKGROUND command  
ACTIVE BACKGROUND commands, which can only be executed while the MCU  
is in ACTIVE BACKGROUND mode. ACTIVE BACKGROUND commands include  
commands to:  
Read or write CPU registers  
Trace one user program instruction at a time  
Leave ACTIVE BACKGROUND mode to return to the user’s application program  
(GO)  
The ACTIVE BACKGROUND mode is used to program a boot loader or user application  
program into the FLASH program memory before the MCU is operated in RUN mode  
for the first time. When the FXTH87E is shipped from the NXP factory, the FLASH  
program memory is erased by default (unless specifically requested otherwise) so there  
is no program that could be executed in RUN mode until the FLASH memory is initially  
programmed.  
The ACTIVE BACKGROUND mode can also be used to erase and reprogram the  
FLASH memory after it has been previously programmed.  
FXTH87ERM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2019. All rights reserved.  
Reference manual  
Rev. 5.0 — 4 February 2019  
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