- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45226 > MC68HC11D3CFB (MOTOROLA INC) 8-BIT, 2 MHz, MICROCONTROLLER, PQFP44 PDF資料下載
參數(shù)資料
| 型號(hào)： | MC68HC11D3CFB |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 2 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | QFP-44 |
| 文件頁數(shù)： | 67/131頁 |
| 文件大小： | 1640K |
| 代理商： | MC68HC11D3CFB |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁當(dāng)前第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁
MOTOROLA
OPERATING MODES AND ON-CHIP MEMORY
MC68HC11D3
4-6
TECHNICAL DATA
In the second method, the MODB/VSTBY pin can supply RAM power from a battery
backup or from a second power supply, as shown in Figure 4-3. Using the MODB/
VSTBY pin may require external hardware, but can be justified when a significant
amount of external circuitry is operating from VDD. If VSTBY is used to maintain RAM
contents, reset must be held low whenever VDD is below normal operating level. Refer
Figure 4-3 RAM Standby MODB/VSTBY Connections
4.2.1 Priority and Mode Select Register
The four operating modes are selected with the logic states of the mode A (MODA)
and mode B (MODB) pins during reset. The MODA and MODB logic levels determine
the logic state of the special mode (SMOD) and mode A (MDA) control bits in the
HPRIO register.
After reset is released, the mode select pins no longer influence the MCU operating
mode. For single-chip mode, the MODA pin is connected to a logic zero. For expanded
mode, MODA is normally connected to VDD through a pull-up resistor of 4.7 k. The
MODA pin also functions as the load instruction register (LIR) pin when the MCU is not
in reset. The open drain active low LIR output pin drives low during the first E cycle of
each instruction. The MODB pin also functions as standby power input, VSTBY, which
about hardware mode selection.
Table 4-2 Hardware Mode Select Summary
Inputs
Mode
Latched at Reset
MODB
MODA
RBOOT
SMOD
MDA
1
0
Single-Chip
0
1
Expanded Multiplexed
0
1
0
Special Bootstrap
1
0
1
Special Test
0
1
MODB/VSTBY CONN
4.7k
MAX
690
VBATT
+
4.8 V
NiCd
VDD
VOUT
TO MODB/VSTBY
OF M68HC11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68L11D0CFBE2 | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC711D3CFN1 | 8-BIT, OTPROM, MICROCONTROLLER, PQCC44 |
| MC68L11D0CFB2 | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44 |
| MC68L11D0FN2 | 8-BIT, 2 MHz, MICROCONTROLLER, PQCC44 |
| MC68HC11D0CFN3R2 | 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PQCC44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC11D3CFB1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
| MC68HC11D3CFB3 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
| MC68HC11D3CFB4 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
| MC68HC11D3CFN | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
| MC68HC11D3CFN1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。