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| 型號(hào)： | MC68HC705B16 |
| 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)： | 201/298頁(yè) |
| 文件大小： | 3532K |
| 代理商： | MC68HC705B16 |
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MC68HC05B6
Rev. 4
MOTOROLA
E-13
MC68HC705B16
14
E.4.1
Erased EPROM verification
If a non $00 byte is detected, the red LED is turned on and the routine stops (see Figure E-3 and
Figure E-4). Only when the entire EPROM content is verified as erased does the green LED switch
on. PD1 is then checked. If PD1=0, the bootstrap program stops here and no programming occurs
until such time as a high level is sensed on PD1. If PD1=1, the bootstrap program proceeds to
erase the EEPROM1 for a nominal 100 ms (4.0 MHz crystal). It is then checked for complete
erasure; if a non $FF byte is detected, the red LED is turned on, and erase is performed a second
time, and so on until total erasure is verified. At this point, both EPROM and EEPROM1 are
completely erased and the security bit is cleared. The programming operation can then be
performed. A schematic diagram of the circuit required for erased EPROM verification is shown in
Figure E-7.
E.4.2
EPROM/EEPROM parallel bootstrap
Before the parallel bootstrap routines begin, the erased EPROM verification program is executed
as described in Section E.4.1. When PD2=0, the programming time is set to 5 milliseconds with
the bootstrap program and verify for the EPROM taking approximately 15 seconds. The EPROM
is loaded in increasing address order with non EPROM segments being skipped by the loader.
Simultaneous programming is performed by reading eight bytes of data before actual
programming is performed, thus the loading time of the internal EPROM is divided by eight.
Parallel data is entered through Port A, while the 14-bit address is output on port B, PC0 to PC4
and TCMP2. If the data comes from an external EPROM, the handshake can be disabled by
connecting together PC5 and PC6. If the data is supplied by a parallel interface, handshaking will
be provided by PC5 and PC6 according to the timing diagram of Figure E-5 (see also Figure E-6).
During programming, the green LED will flash at about 3 Hz.
Upon completion of the programming operation, the contents of the EPROM and EEPROM1 are
checked against the external data source. If programming is verified the green LED stays on, while
an error will cause the red LED to be turned on. Figure E-7 is a schematic diagram of a circuit that
can be used to program the EPROM or to load and execute data in the RAM.
Note:
The entire EPROM and EEPROM1 can be loaded from the external source; if it is
desired to leave a segment undisturbed, the data for this segment should be all zeros
for EPROM data and all $FFs for EEPROM1 data.
TPG
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PDF描述 |
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| MC68HC705B16N | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| MC68HC705B32 | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC705B16CFN | 制造商:Motorola Inc 功能描述: |
| MC68HC705B16FN | 制造商:Rochester Electronics LLC 功能描述: |
| 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 |
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