參數(shù)資料
型號(hào)： MAXQ7667EVKIT+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 21/40頁(yè)
文件大?。?/td> 0K
描述： KIT EVAL FOR MAX7667
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
系列： MAXQ®
傳感器類(lèi)型： 超聲波距離測(cè)量
接口： JTAG，LIN，UART
電源電壓： 2.25 V ~ 5.5 V
嵌入式： 是，MCU，16 位
已供物品： 板
已用 IC / 零件： MAXQ7667
MAXQ7667
16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
28
______________________________________________________________________________________
memory. Access physical memory segments (other
than the stack and register memories) as either pro-
gram memory or data memory, but not both at once.
By default, the memory is arranged in a Harvard archi-
tecture, with separate address spaces for program and
data memory. The configuration of program and data
space depends on the current execution location.
When executing code from flash memory, access
the SRAM and utility ROM in data space.
When executing code from SRAM, access the
flash memory and utility ROM in data space.
When executing code from the utility ROM, access
the flash memory and SRAM in data space.
Utility ROM (see Section 18 of
the MAXQ7667 User’s Guide)
The utility ROM is a 4K x 16 block of internal ROM
memory that defaults to a starting address of 8000h.
The utility ROM consists of subroutines called from
application software. The subroutines include:
In-system programming (bootloader) over the
JTAG or UART interface
In-circuit debug routines
Test routines (internal memory tests, memory
loader, etc.)
User-callable routines for in-application flash pro-
gramming and code space table lookup
Following any reset, execution begins in the utility ROM.
The ROM software determines whether the program
execution immediately jumps to the start of the user-
application code (located at address 0000h) or to one
of the special routines mentioned above. Call the rou-
tines within the utility ROM using the application soft-
ware. Refer to the
MAXQ7667 User’s Guide for more
information on the utility ROM contents.
Password protect in-system programming, in-applica-
tion programming, and in-circuit debugging functions
using a password-lock (PWL) bit. The PWL bit is imple-
mented in the SC register. When the PWL bit is set to
one (POR default), the password is required to access
the utility ROM, including in-circuit debug and in-sys-
tem programming routines that allow reading or writing
of internal memory. When the PWL bit is cleared to
zero, these utilities are fully accessible without the
password. The password is automatically set to all ones
following a mass erase.
Data Memory
The 2K x 16 internal data SRAM maps into either pro-
gram or data space. The contents of the SRAM are
maintained during stop mode and across non-POR
resets, as long as DVDD remains within the operating
voltage range.
A data memory cycle requires only one system clock
period to support fast internal execution. This allows a
complete read or write operation on SRAM in one clock
cycle. The MMU handles data memory mapping and
access control. Read or write to the data memory with
word or byte-wide commands.
Stack Memory
The MAXQ7667 provides a 16 x 16 hardware stack to
support subroutine calls and system interrupts. A 16-bit
wide internal hardware stack provides storage for pro-
gram return addresses and general-purpose use. The
stack is used automatically by the processor when the
CALL, RET, and RETI instructions are executed and
interrupts serviced.
Register Set
Sets of registers control most functions. These registers
provide a working space for memory operations as well
as configuring and addressing peripheral registers on
the device. Registers are divided into two major types;
system registers and peripheral registers. The register
set common to most MAXQ-based devices, also known
as the system registers, includes the ALU, accumulator
registers, data pointers, interrupt vectors and control,
and stack pointer. The peripheral registers define addi-
tional functionality. Tables 1 and 3 show the MAXQ7667
register set.
Programming
Two different methods program the flash memory: in-
system programming and in-application programming.
Both methods afford great flexibility in system design
as well as reduce the life-cycle cost of the embedded
system. The MAXQ7667 password protects these fea-
tures to prevent unauthorized access to code memory.
In-System Programming
An internal bootstrap loader reloads the device over a
simple JTAG or UART interface allowing cost savings in
system software upgrade. During power-up, the
MAXQ7667 first checks for activity on the JTAG port. If
no activity is present, the device checks if a password-
protected program is present. If the password is set,
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參數(shù)描述
MAXQ7667EVKIT+ 功能描述:開(kāi)發(fā)板和工具包 - 其他處理器 MAXQ7667 Eval Kit RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類(lèi)型:I2C, SPI, USB 工作電源電壓:
MAXQ7667EVKIT-1# 功能描述:開(kāi)發(fā)板和工具包 - 其他處理器 MAXQ7667EVKIT-1# RoHS:否 制造商:Maxim Integrated 產(chǎn)品: 工具用于評(píng)估: 核心: 接口類(lèi)型: 工作電源電壓:
MAXQ7668AACM/V+ 功能描述:16位微控制器 - MCU Integrated Circuits (ICs) Embedded - Microcontrollers - ADC 12BIT 8CH SER 2.7V LQFP RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
MAXQ7668AACM/V+T 功能描述:16位微控制器 - MCU Integrated Circuits (ICs) Embedded - Microcontrollers - ADC 12BIT 8CH SER 2.7V LQFP RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
MAXQ7668AACM+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
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