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| 型號： | M68HC711D0CFN |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 2 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, PLCC-44 |
| 文件頁數(shù)： | 69/124頁 |
| 文件大?。?/td> | 5398K |
| 代理商： | M68HC711D0CFN |
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RESETS AND INTERRUPTS
TECHNICAL DATA
5-5
5.2.3 Parallel I/O
When a reset occurs in expanded multiplexed operating modes, the pins used for par-
allel I/O are dedicated to the expansion bus. In single-chip and bootstrap modes, all
ports are parallel I/O data ports. In expanded multiplexed and test modes, ports B, C,
and lines DATA6/AS and DATA7/R/W are a memory expansion bus with port B as a
high-order address bus, port C as a multiplexed address and data bus, AS as the de-
multiplexing signal, and R/as the data bus direction control. The CWOM bit in PIOC is
cleared so that port C is not in wired-OR mode. Port A, bits [0:3] and 7; and ports B,
C, and D are general-purpose I/O at reset and set for input. For this reason the pins
are configured as high impedance upon reset. Port A bits [4:6] are outputs, so high im-
pedance protection is not necessary.
NOTE
Do not confuse pin function with the electrical state of the pin at reset.
All general-purpose I/O pins configured as inputs at reset are in a
high impedance state. Port data registers reflect the port's functional
state at reset. The pin function is mode dependent.
5.2.4 Timer
During reset, the timing system is initialized to a count of $0000. The prescaler bits are
cleared, and all output compare registers are initialized to $FFFF. All input capture reg-
isters are indeterminate after reset. The output compare 1 mask (OC1M) register is
cleared so that successful OC1 compares do not affect any I/O pins. The other four
output compares are configured so that they do not affect any I/O pins on successful
compares. All input capture edge-detector circuits are configured for capture disabled
operation. The timer overflow interrupt flag and all eight timer function interrupt flags
are cleared. All nine timer interrupts are disabled because their mask bits have been
cleared.
The I4/O5 bit in the PACTL register is cleared to configure the I4/O5 function as OC5;
however, the OM5:OL5 control bits in the TCTL1 register are clear so OC5 does not
control the PA3 pin.
5.2.5 Real-Time Interrupt
The real-time interrupt flag (RTIF) is cleared and automatic hardware interrupts are
masked. The rate control bits are cleared after reset and can be initialized by software
before the real-time interrupt (RTI) system is used. After reset, a full RTI period elaps-
es before the first RTI interrupt.
5.2.6 Pulse Accumulator
The pulse accumulator system is disabled at reset so that the PAI input pin defaults to
being a general-purpose input pin (PA7).
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| M68ICS05C | 功能描述:SIM PROGRAM FOR 68HC705C8A/C9A RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標準包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
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