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參數(shù)資料
| 型號(hào)： | MC68HC705B16N |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁(yè)數(shù)： | 175/298頁(yè) |
| 文件大?。?/td> | 3532K |
| 代理商： | MC68HC705B16N |
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MC68HC05B6
Rev. 4
MOTOROLA
C-13
MC68HC705B5
14
C.5.3
EPROM (RAM) serial bootstrap load and execute
The serial routine communicates through the SCI with an external host, typically a PC, by means
of an RS232 link at 9600 baud, 8-bit, no parity and full duplex.
Data format is not ASCII, but 8-bit binary, so a complementary program must be run by the host to
supply the required format. Such a program is available for the IBM PC from Motorola.
The EPROM bootstrap routines are used to customise the OTP EPROM. To increase the speed
of programming, four bytes are programmed in parallel while the data is simultaneously
transmitted and received in full duplex. This implies that while 4 bytes are being programmed, the
next 4 bytes are received and the preceding 4 bytes are echoed. The format accepted by the serial
loader is as follows:
[address n high] [address n low] [data(n)] [data (n+1)] [data (n+2)] [data (n+3)]
Address n must have the two LSBs at zero so that n, n+1, n+2 and n+3 have identical MSBs. These
blocks of four bytes do not need to be contiguous, as a new address is transmitted for each new
group.
The protocol is as follows:
1
The MC68HC705B5 sends the last two bytes programmed to the host as a
prompt; this allows verification by the host of proper programming.
1) In response to the first byte prompt, the host sends the first address byte.
2) After receiving the first address byte, the MC68HC705B5 sends the next
byte programmed.
3) The exchange of data continues until the MC68HC705B5 has sent the four
data bytes and the host has sent the 2 address data bytes and 4 data bytes.
4) If the data is non zero, it is programmed at the address provided, while the
next address and bytes are received and the previous data is echoed.
5) Loop to 1.
After reset, the MC68HC705B5 serial bootstrap routine will first echo two blocks of four bytes at
$0000, as no data is programmed yet.
If the data sent in is $00, no programming in the EPROM takes place, and the contents of the
accessed location are returned as a prompt. The entire EPROM memory can be read in this
fashion (serial dump). The red LED will be on if the data read from the EPROM is not $00.
Serial RAM loading and execute can be accomplished in this mode. A RAM byte will be written if
the address sent by the host in the serial protocol points to the RAM.
In the RAM bootloader mode, all interrupt vectors are mapped to pseudo-vectors in RAM (see
Table C-3). This allows programmers to use their own service-routine addresses. Each
pseudo-vector is allowed three bytes of space rather than the two bytes for normal vectors,
because an explicit jump (JMP) opcode is needed to cause the desired jump to the user’s
service-routine address.
TPG
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC705B32 | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| MC68HC705B5 | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| MC68HC05BD3 | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| MC68HC05BD5 | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| MC68HC705BD3 | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC705B16NB | 制造商:Rochester Electronics LLC 功能描述: |
| MC68HC705B16NCB | 制造商:Rochester Electronics LLC 功能描述: |
| MC68HC705B16NCFN | 功能描述:IC MCU 2.1MHZ 15K OTP 52-PLCC RoHS:否 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設(shè)備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類(lèi)型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤(pán) 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND |
| MC68HC705BD3P | 制造商:Motorola 功能描述:MOTOROLA NXC4C |
| MC68HC705BD7P1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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