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鍙冩暩(sh霉)璩囨枡
| 鍨嬭櫉锛� | MC908QY4CDTER |
| 寤犲晢锛� | Freescale Semiconductor |
| 鏂囦欢闋佹暩(sh霉)锛� | 170/184闋� |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC MCU 8BIT 4K FLASH 16-TSSOP |
| 妯欐簴鍖呰锛� | 2,500 |
| 绯诲垪锛� | HC08 |
| 鏍稿績铏曠悊鍣細 | HC08 |
| 鑺珨灏哄锛� | 8-浣� |
| 閫熷害锛� | 8MHz |
| 澶栧湇瑷�(sh猫)鍌欙細 | LVD锛孭OR锛孭WM |
| 杓稿叆/杓稿嚭鏁�(sh霉)锛� | 13 |
| 绋嬪簭瀛樺劜鍣ㄥ閲忥細 | 4KB锛�4K x 8锛� |
| 绋嬪簭瀛樺劜鍣ㄩ鍨嬶細 | 闁冨瓨 |
| RAM 瀹归噺锛� | 128 x 8 |
| 闆诲 - 闆绘簮 (Vcc/Vdd)锛� | 2.7 V ~ 5.5 V |
| 鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� | A/D 4x8b |
| 鎸暕鍣ㄥ瀷锛� | 鍏�(n猫i)閮� |
| 宸ヤ綔婧害锛� | -40°C ~ 85°C |
| 灏佽/澶栨锛� | 16-TSSOP锛�0.173"锛�4.40mm 瀵級 |
| 鍖呰锛� | 甯跺嵎 (TR) |
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Low-Voltage Inhibit (LVI)
MC68HC908QY/QT Family Data Sheet, Rev. 6
86
Freescale Semiconductor
VTRIPF. Setting the LVI enable in stop mode bit, LVISTOP, enables the LVI to operate in stop mode.
Setting the LVI 5-V or 3-V trip point bit, LVI5OR3, enables the trip point voltage, VTRIPF, to be configured
for 5-V operation. Clearing the LVI5OR3 bit enables the trip point voltage, VTRIPF, to be configured for 3-V
operation. The actual trip thresholds are specified in 16.5 5-V DC Electrical Characteristics and 16.9 3-V
NOTE
After a power-on reset, the LVI鈥檚 default mode of operation is 3 volts. If a
5-V system is used, the user must set the LVI5OR3 bit to raise the trip point
to 5-V operation.
If the user requires 5-V mode and sets the LVI5OR3 bit after power-on reset
while the VDD supply is not above the VTRIPR for 5-V mode, the
microcontroller unit (MCU) will immediately go into reset. The next time the
LVI releases the reset, the supply will be above the VTRIPR for 5-V mode.
Once an LVI reset occurs, the MCU remains in reset until VDD rises above a voltage, VTRIPR, which
causes the MCU to exit reset. See Chapter 13 System Integration Module (SIM) for the reset recovery
sequence.
The output of the comparator controls the state of the LVIOUT flag in the LVI status register (LVISR) and
can be used for polling LVI operation when the LVI reset is disabled.
10.3.1 Polled LVI Operation
In applications that can operate at VDD levels below the VTRIPF level, software can monitor VDD by polling
the LVIOUT bit. In the configuration register, the LVIPWRD bit must be cleared to enable the LVI module,
and the LVIRSTD bit must be at set to disable LVI resets.
10.3.2 Forced Reset Operation
In applications that require VDD to remain above the VTRIPF level, enabling LVI resets allows the LVI
module to reset the MCU when VDD falls below the VTRIPF level. In the configuration register, the
LVIPWRD and LVIRSTD bits must be cleared to enable the LVI module and to enable LVI resets.
10.3.3 Voltage Hysteresis Protection
Once the LVI has triggered (by having VDD fall below VTRIPF), the LVI will maintain a reset condition until
VDD rises above the rising trip point voltage, VTRIPR. This prevents a condition in which the MCU is
continually entering and exiting reset if VDD is approximately equal to VTRIPF. VTRIPR is greater than
VTRIPF by the hysteresis voltage, VHYS.
10.3.4 LVI Trip Selection
The LVI5OR3 bit in the configuration register selects whether the LVI is configured for 5-V or 3-V
protection.
NOTE
The microcontroller is guaranteed to operate at a minimum supply voltage.
The trip point (VTRIPF [5 V] or VTRIPF [3 V]) may be lower than this.
Characteristics for the actual trip point voltages.
鐩搁棞(gu膩n)PDF璩囨枡 |
PDF鎻忚堪 |
|---|---|
| DS21554L+ | IC TXRX E1 1-CHIP 5V 100-LQFP |
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| DS21352L+ | IC TXRX T1 1-CHIP 3.3V 100-LQFP |
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鐩搁棞(gu膩n)浠ｇ悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉) |
鍙冩暩(sh霉)鎻忚堪 |
|---|---|
| MC908QY4CDTR2 | 鍒堕€犲晢:Rochester Electronics LLC 鍔熻兘鎻忚堪: 鍒堕€犲晢:Freescale Semiconductor 鍔熻兘鎻忚堪: |
| MC908QY4CDWE | 鍒堕€犲晢:FREESCALE 鍒堕€犲晢鍏ㄧū:Freescale Semiconductor, Inc 鍔熻兘鎻忚堪:M68HC08 Microcontrollers |
| MC908QY4CDWER | 鍔熻兘鎻忚堪:8浣嶅井鎺у埗鍣� -MCU 4K FLASH W/ADC EPP RoHS:鍚� 鍒堕€犲晢:Silicon Labs 鏍稿績:8051 铏曠悊鍣ㄧ郴鍒�:C8051F39x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:8 bit 鏈€澶ф檪閻橀牷鐜�:50 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:16 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:1 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:1.8 V to 3.6 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:QFN-20 瀹夎棰�(f膿ng)鏍�:SMD/SMT |
| MC908QY4CFQE | 鍒堕€犲晢:FREESCALE 鍒堕€犲晢鍏ㄧū:Freescale Semiconductor, Inc 鍔熻兘鎻忚堪:M68HC08 Microcontrollers |
| MC908QY4CPE | 鍒堕€犲晢:FREESCALE 鍒堕€犲晢鍏ㄧū:Freescale Semiconductor, Inc 鍔熻兘鎻忚堪:MC908QY4CPE |
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