欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: MC68HC11A8VCFU2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: HCMOS Single-Chip Microcontroller
中文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP64
封裝: QFP-64
文件頁數: 32/158頁
文件大?。?/td> 776K
代理商: MC68HC11A8VCFU2
MOTOROLA
3-6
ON-CHIP MEMORY
MC68HC11A8
TECHNICAL DATA
3
The erased state of an EEPROM byte is $FF. Programming changes ones to zeros. If
any bit in a location needs to be changed from a zero to a one, the byte must be erased
in a separate operation before it is reprogrammed. If a new data byte has no ones in
bit positions which were already programmed to zero, it is acceptable to program the
new data without erasing the EEPROM byte first. For example, programming $50 to a
location which was already $55 would change the location to $50.
Programming and erasure of the EEPROM relies on an internal high-voltage charge
pump. At E clock frequencies below 2 MHz the efficiency of this charge pump decreas-
es which increases the time required to program or erase a location. The recommend-
ed program and erase time is 10 milliseconds when the E clock is 2 MHz and should
be increased to as much as 20 milliseconds when E is between 1 MHz and 2 MHz.
When the E clock is below 1 MHz, the clock source for the charge pump should be
switched from the system clock to an on-chip R-C oscillator clock. This is done by set-
ting the CSEL bit in the OPTION register. A 10 millisecond period should be allowed
after setting the CSEL bit to allow the charge pump to stabilize. Note that the CSEL bit
also controls a clock to the analog-to-digital converter subsystem.
3.5.1 EEPROM Programming Control Register (PPROG)
This 8-bit register is used to control programming and erasure of the 512-byte EE-
PROM. Reset clears this register so the EEPROM is configured for normal reads.
ODD — Program Odd Rows (TEST)
EVEN — Program Even Rows (TEST)
Bit 5 — Not implemented.
This bit always reads zero.
BYTE — Byte Erase Select
This bit overrides the ROW bit.
0 = Row or Bulk Erase
1 = Erase Only One Byte
ROW — Row Erase Select
If the BYTE bit is 1, ROW has no meaning.
0 = Bulk Erase
1 = Row Erase
ERASE — Erase Mode Select
0 = Normal Read or Program
1 = Erase Mode
7
6
5
0
0
4
3
2
1
0
$
1
03B
RESET
ODD
0
EVEN
0
BYTE
0
ROW
0
ERASE
0
EELAT
0
EEPGM
0
PPROG
相關PDF資料
PDF描述
MC68HC11A1VFU2 HCMOS Single-Chip Microcontroller
MC68HC11E0CB2 Microcontrollers
MC68S711E9CFN2 Microcontrollers
MC68HC711E20FS3 Microcontrollers
MC68L11E20FU2 Microcontrollers
相關代理商/技術參數
參數描述
MC68HC11AOFNR2 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述:
MC68HC11AX 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-Bit Microcontrollers
MC68HC11C0 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit Microcontroller
MC68HC11C0CFN2 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit Microcontroller
MC68HC11C0CFN3 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit Microcontroller
主站蜘蛛池模板: 馆陶县| 南陵县| 长寿区| 香格里拉县| 寻甸| 砀山县| 蓬溪县| 古浪县| 临夏市| 枣强县| 柏乡县| 江口县| 万载县| 霍山县| 马龙县| 绥棱县| 武宣县| 七台河市| 桐柏县| 广安市| 阜阳市| 礼泉县| 新竹县| 丹阳市| 微博| 清徐县| 丽水市| 神农架林区| 上思县| 沾化县| 陈巴尔虎旗| 凤山县| 黔江区| 习水县| 揭东县| 加查县| 崇义县| 温宿县| 林芝县| 淮安市| 景宁|