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参数资料
| 型号： | ACE1202LM8X |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| 中文描述： | 8-BIT, EEPROM, 1 MHz, MICROCONTROLLER, PDSO8 |
| 封装： | PLASTIC, SOIC-8 |
| 文件页数： | 33/39页 |
| 文件大小： | 2121K |
| 代理商： | ACE1202LM8X |
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33
www.fairchildsemi.com
ACE1202 Product Family Rev. B.1
A
13.0 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 gener-
ated by any one of the following three conditions:
Power-on Reset (as described in Section 14.0)
Brown-out Reset (as described in Section 12.1)
Watchdog Reset (as described in Section 7.0)
External Reset
18
(as described in Section 14.0)
18
Available only on the 14-pin package option.
14.0 Power-On-Reset
The Power-On Reset (POR) circuit is guaranteed to work if the
rate of rise of V
CC
is no slower than 10ms/1volt. The POR circuit
was designed to respond to fast low to high transitions between 0V
and V
CC
. The circuit will not work if V
CC
does not drop to 0V before
the next power-up sequence. In applications where 1) the V
CC
rise
is slower than 10ms/1 volt or 2) V
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. Therefore,
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.
15.0 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 entering 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 17) 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 configuration, the output clock (CKO)
is on the G0 pin. (See Figure 34) If an external crystal or RC is
used, internally the input frequency (CKI) is divided-down by four
to yield the corresponding instruction clock. If the device is
configured for an external square clock, it will not be divided.
Table 17: CMODEx Bit Definition
CMODE[1]
CMODE[0]
Clock Type
0
0
Internal 1 MHz clock
0
1
External square clock
1
0
External crystal/resonator
1
1
External RC clock
Figure 33: BOR and POR Circuit Relationship Diagram
VCC (Pin 8)
BOR
Reset
circuit
output
Global Reset
to Logic
External
Reset
Pin
(14-Pin Only)
B
A
output
POR
(Pin 7)
output
VCC
Time
BOR Output
0
VCC
1.75
0
POR
output
POR Output
Pulse
1.8V
0
VCC
VCC
5.0V
0
The Reset circuit will trigger
when inputs A or B transition
from High to Low. At that time
the Global Reset signal will go
high which will reset all controller
logic. The Global Reset will go
high and stay high for around 1
μ
s.
相关PDF资料 |
PDF描述 |
|---|---|
| ACE1202LMX | Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1202LN | Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1202LN14 | Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1202M | Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1202M8 | Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ACE1202LMX | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Arithmetic Controller Engine (ACEx⑩) for Low Power Applications |
| ACE1202LN | 功能描述:8位微控制器 -MCU arithmetic Controllr Engine RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| ACE1202LN14 | 功能描述:8位微控制器 -MCU arithmetic Controllr Engine RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| ACE1202M | 功能描述:8位微控制器 -MCU arithmetic Controllr Engine RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| ACE1202M8 | 功能描述:8位微控制器 -MCU arithmetic Controllr Engine RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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