- 鎮ㄧ従鍦ㄧ殑浣嶇疆锛�璨疯常IC缍� > PDF鐩寗3872 > PIC18F4450T-I/ML (Microchip Technology)IC PIC MCU FLASH 8KX16 44QFN PDF璩囨枡涓嬭級
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| 鍨嬭櫉锛� | PIC18F4450T-I/ML |
| 寤犲晢锛� | Microchip Technology |
| 鏂囦欢闋佹暩锛� | 12/241闋� |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC PIC MCU FLASH 8KX16 44QFN |
| 鐢㈠搧鍩硅〒妯″锛� | Asynchronous Stimulus |
| 妯欐簴鍖呰锛� | 1,600 |
| 绯诲垪锛� | PIC® 18F |
| 鏍稿績铏曠悊鍣細 | PIC |
| 鑺珨灏哄锛� | 8-浣� |
| 閫熷害锛� | 48MHz |
| 閫ｉ€氭€э細 | UART/USART锛孶SB |
| 澶栧湇瑷倷锛� | 娆犲妾㈡脯/寰╀綅锛孒LVD锛孭OR锛孭WM锛學DT |
| 杓稿叆/杓稿嚭鏁革細 | 34 |
| 绋嬪簭瀛樺劜鍣ㄥ閲忥細 | 16KB锛�8K x 16锛� |
| 绋嬪簭瀛樺劜鍣ㄩ鍨嬶細 | 闁冨瓨 |
| RAM 瀹归噺锛� | 768 x 8 |
| 闆诲 - 闆绘簮 (Vcc/Vdd)锛� | 4.2 V ~ 5.5 V |
| 鏁告摎杞夋彌鍣細 | A/D 13x10b |
| 鎸暕鍣ㄥ瀷锛� | 鍏ч儴 |
| 宸ヤ綔婧害锛� | -40°C ~ 85°C |
| 灏佽/澶栨锛� | 44-VQFN 瑁搁湶鐒婄洡 |
| 鍖呰锛� | 甯跺嵎 (TR) |
| 閰嶇敤锛� | DM163025-ND - PIC DEM FULL SPEED USB DEMO BRD |
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109
XMEGA A [MANUAL]
8077I鈥揂VR鈥�11/2012
When VCC increases above the trigger level (VBOT+ in Figure 9-4), the reset counter starts the MCU after the timeout
period, tTOUT, has expired.
The trigger level has a hysteresis to ensure spike free brownout detection. The hysteresis on the detection level should
be interpreted as VBOT+= VBOT + VHYST/2 and VBOT- = VBOT - VHYST/2.
The BOD circuit will detect a drop in VCC only if the voltage stays below the trigger level for longer than tBOD.
Figure 9-4.
Brownout detection reset.
For BOD characterization data consult the device datasheet. The programmable BODLEVEL setting is shown in Table 9-
Table 9-2.
Programmable BODLEVEL setting.
Notes:
1.
The values are nominal values only. For accurate, actual numbers, consult the device datasheet.
2.
Changing these fuse bits will have no effect until leaving programming mode.
The BOD circuit has three modes of operation:
Disabled:
In this mode, there is no monitoring of the VCC level.
Enabled:
In this mode, the VCC level is continuously monitored, and a drop in VCC below VBOT for a period of tBOD
will give a brownout reset
Sampled:
In this mode, the BOD circuit will sample the VCC level with a period identical to that of the 1kHz output
from the ultra low power (ULP) internal oscillator. Between each sample, the BOD is turned off. This mode will
reduce the power consumption compared to the enabled mode, but a fall in the VCC level between two positive
BOD level
Fuse BODLEVEL[2:0](2)
VBOT
Unit
BOD level 0
111
1.6
V
BOD level 1
110
1.9
BOD level 2
101
2.1
BOD level 3
100
2.4
BOD level 4
011
2.6
BOD level 5
010
2.9
BOD level 6
001
3.2
BOD level 7
000
3.4
VCC
TIME-OUT
INTERNAL
RESET
VBOT-
VBOT+
tTOUT
tBOD
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