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參數(shù)資料
| 型號： | ACE1501EMTX |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | ACE1501 Product Family Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| 中文描述： | ACE1501產(chǎn)品系列運算控制器引擎（ACEx⑩）的低功耗應(yīng)用 |
| 文件頁數(shù)： | 27/33頁 |
| 文件大?。?/td> | 1187K |
| 代理商： | ACE1501EMTX |
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www.fairchildsemi.com
ACE1501 Product Family Rev. 1.
1
12. RESET block
When a RESET sequence is initiated, all I/O registers will be
reset setting all I/Os to high-impedence inputs. The system
clock is restarted after the required clock start-up delay. A reset
is generated by any one of the following four conditions:
Power-on Reset (as described in Section 13)
Brown-out Reset (as described in Section 11.1)
Watchdog Reset (as described in Section 6)
External Reset
18
(as described in Section 13)
18. Available only on the 14-pin package option
13. Power-On Reset
The Power-On Reset (POR) circuit is guaranteed to work if the
rate of rise of Vcc is no slower than 10ms/1volt. The POR circuit
was designed to respond to fast low to high transitions between
0V and Vcc. The circuit will not work if Vcc does not drop to 0V
before the next power-up sequence. In applications where 1)
the Vcc rise is slower than 10ms/1 volt or 2) Vcc does not drop
to 0V before the next power-up sequence the external reset
option should be used.
The external reset provides a way to properly reset the ACEx
microcontroller if POR cannot be used in the application. The
external reset pin contains an internal pull-up resistor. There-
fore, to reset the device the reset pin should be held low for at
least 2ms so that the internal clock has enough time to stabilize.
14. CLOCK
The ACEx microcontroller has an on-board oscillator trimmed to
a frequency of 2MHz who is divided down by two yielding a
1MHz frequency. (See AC Electrical Characteristics) Upon
power-up, the on-chip oscillator runs continuously unless enter-
ing HALT mode or using an external clock source.
If required, an external oscillator circuit may be used depending
on the states of the CMODE bits of the initialization register.
(See Table 16) When the device is driven using an external
clock, the clock input to the device (G1/CKI) can range between
DC to 4MHz. For external crystal con
fi
guration, the output clock
(CKO) is on the G0 pin. (See Figure 34.) If the device is con
fi
g-
ured for an external square clock, it will not be divided.
Table 16. CMODEx Bit De
fi
nition
Figure 34. Crystal
15. HALT Mode
The HALT mode is a power saving feature that almost com-
pletely shuts down the device for current conservation. The
device is placed into HALT mode by setting the HALT enable bit
(EHALT) of the HALT register through software using only the
“
LD M, #
”
instruction. EHALT is a write only bit and is automati-
cally cleared upon exiting HALT. When entering HALT, the inter-
nal oscillator and all the on-chip systems including the LBD and
the BOR circuits are shut down.
The device can exit HALT mode only by the MIW circuit. There-
fore, prior to entering HALT mode, software must con
fi
gure the
MIW circuit accordingly. (See Section 8) After a wakeup from
HALT, a 1ms start-up delay is initiated to allow the internal oscil-
lator to stabilize before normal execution resumes. Immediately
after exiting HALT, software must clear the Power Mode Clear
(PMC) register by only using the
“
LD M, #
”
instruction. (See Fig-
ure 36)
Figure 35. HALT Register De
fi
nition
CMODE [1] CMODE [0]
Clock Type
0
0
Internal 1 MHz clock
0
1
External square clock
1
0
External crystal/resonator
1
1
Reserved
R2
C2
CKI
CKO
R1
C1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Unde
fi
ned
unde
fi
ned
unde
fi
ned
unde
fi
ned
unde
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ned
unde
fi
ned
EIDLE
EHALT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ACE1501EMX | ACE1501 Product Family Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1501EN | ACE1501 Product Family Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1501VM | ACE1501 Product Family Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1501EM | ACE1501 Product Family Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1501EM8 | ACE1501 Product Family Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ACE1501EMX | 功能描述:8位微控制器 -MCU arithmetic Controllr Engine RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ACE1501EN | 功能描述:8位微控制器 -MCU arithmetic Controllr Engine RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ACE1501EN14 | 功能描述:8位微控制器 -MCU arithmetic Controllr Engine RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ACE1501V | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:ACE1501 Product Family Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1501VM | 功能描述:8位微控制器 -MCU arithmetic Controllr Engine RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
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