參數(shù)資料
型號: ATAM893T-TKS
廠商: Atmel
文件頁數(shù): 9/98頁
文件大?。?/td> 0K
描述: IC MON TIRE-PRESS ATARX9X SER
標(biāo)準(zhǔn)包裝: 830
系列: MARC4
核心處理器: MARC4
芯體尺寸: 4-位
速度: 4MHz
連通性: SSI(2 線,3 線)
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 16
程序存儲器容量: 4KB(4K x 8)
程序存儲器類型: EEPROM
EEPROM 大小: 64 x 16
RAM 容量: 256 x 4
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 6.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 20-SOIC(0.209",5.30mm 寬)
包裝: 管件
17
4680C–4BMCU–01/05
ATAM893-D
4.5.2
Oscillator Circuits and External Clock Input Stage
The ATAM893-D series consists of four different internal oscillators: two RC-oscillators, one 4-
MHz crystal oscillator, one 32-kHz crystal oscillator and one external clock input stage.
4.5.2.1
RC-oscillator 1 Fully Integrated
For timing insensitive applications, it is possible to use the fully integrated RC-oscillator 1. It
operates without any external components and saves additional costs. The RC-oscillator 1 cen-
ter frequency tolerance is better than
±50% over the full temperature and voltage range. The
basic center frequency of the RC-oscillator 1 is f
O
4.0 MHz. The RC oscillator 1 is selected by
default after power-on reset.
Figure 4-13. RC-oscillator 1
4.5.2.2
External Input Clock
The OSC1 or OSC2 can be driven by an external clock source provided it meets the specified
duty cycle, rise and fall times and input levels. Additionally, the external clock stage contains a
supervisory circuit for the input clock. The supervisor function is controlled via the OS1, OS0 bit
in the SC register and the CCS bit in the CM register. If the external input clock is missing for
more than 1 ms and CCS = 0 is set in the CM register, the supervisory circuit generates a hard-
ware reset.
Figure 4-14. External Input Clock
RC-oscillator 1
RcOut1
Stop
Control
RcOut1
Osc-Stop
Ext. input clock
ExOut
Stop
Ext.
Clock
RcOut1
Osc-Stop
ExIn
CCS
Res
OSC1
OSC2
Clock monitor
Ext.
Clock
or
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