参数资料
型号: ATAM893T-TKQ
厂商: Atmel
文件页数: 7/98页
文件大小: 0K
描述: IC MON TIRE-PRESS ATARX9X SER
标准包装: 4,000
系列: MARC4
核心处理器: MARC4
芯体尺寸: 4-位
速度: 4MHz
连通性: SSI(2 线,3 线)
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 16
程序存储器容量: 4KB(4K x 8)
程序存储器类型: EEPROM
EEPROM 大小: 64 x 16
RAM 容量: 256 x 4
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 6.5 V
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 20-SOIC(0.209",5.30mm 宽)
包装: 带卷 (TR)
15
4680C–4BMCU–01/05
ATAM893-D
VIM
Voltage Interrupt Mask bit
VIM = 0, voltage monitor interrupt is enabled
VIM = 1, voltage monitor interrupt is disabled
VMS
Voltage Monitor Status bit
VMS = 0, the voltage at the comparator input is below V
Ref
VMS = 1, the voltage at the comparator input is above VRef
Figure 4-10. Internal Supply Voltage Supervisor
Figure 4-11. External Input Voltage Supervisor
4.5
Clock Generation
4.5.1
Clock Module
The ATAM893-D contains a clock module with 4 different internal oscillator types: two RC-oscil-
lators, one 4-MHz crystal oscillator and one 32-kHz crystal oscillator. The pins OSC1 and OSC2
are the interface to connect a crystal either to the 4-MHz, or to the 32-kHz crystal oscillator.
OSC1 can be used as input for external clocks or to connect an external trimming resistor for the
RC-oscillator 2. All necessary circuitry except the crystal and the trimming resistor is integrated
on-chip. One of these oscillator types or an external input clock can be selected to generate the
system clock (SYSCL).
In applications that do not require exact timing, it is possible to use the fully integrated RC-oscil-
lator 1 without any external components. The RC-oscillator 1 center frequency tolerance is
better than ±50%. The RC-oscillator 2 is a trimmable oscillator whereby the oscillator frequency
can be trimmed with an external resistor attached between OSC1 and V
DD. In this configuration,
the RC-oscillator 2 frequency can be maintained stable to within a tolerance of ±15% over the
full operating temperature and voltage range.
V
DD
Low threshold
Middle threshold
High threshold
VMS = 1
Low threshold
Middle threshold
High threshold
VMS = 0
3.0 V
2.6 V
2.2 V
1.3 V
VMI
VMS = 1
VMS = 0
Positive slope
Negative slope
VMS = 1
VMS = 0
Interrupt negative slope
Interrupt positive slope
Internal reference level
t
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