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參數資料
| 型號： | S9S08SG4E2MTJ |
| 廠商： | Freescale Semiconductor |
| 文件頁數： | 25/316頁 |
| 文件大?。?/td> | 0K |
| 描述： | MCU 4K FLASH 20-TSSOP |
| 標準包裝： | 75 |
| 系列： | S08 |
| 核心處理器： | S08 |
| 芯體尺寸： | 8-位 |
| 速度： | 40MHz |
| 連通性： | I²C，LIN，SCI，SPI |
| 外圍設備： | LVD，POR，PWM，WDT |
| 輸入/輸出數： | 16 |
| 程序存儲器容量： | 4KB（4K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 256 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 數據轉換器： | A/D 12x10b |
| 振蕩器型： | 內部 |
| 工作溫度： | -40°C ~ 125°C |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 包裝： | 管件 |
Chapter 9 Analog-to-Digital Converter (S08ADCV1)
MC9S08SG8 MCU Series Data Sheet, Rev. 8
120
Freescale Semiconductor
9.1.2
Alternate Clock
The ADC module is capable of performing conversions using the MCU bus clock, the bus clock divided
by two, the local asynchronous clock (ADACK) within the module, or the alternate clock, ALTCLK. The
alternate clock for the MC9S08SG8 MCU devices is the external reference clock (ICSERCLK).
The selected clock source must run at a frequency such that the ADC conversion clock (ADCK) runs at a
frequency within its specified range (fADCK) after being divided down from the ALTCLK input as
determined by the ADIV bits.
ALTCLK is active while the MCU is in wait mode provided the conditions described above are met. This
allows ALTCLK to be used as the conversion clock source for the ADC while the MCU is in wait mode.
ALTCLK cannot be used as the ADC conversion clock source while the MCU is in either stop2 or stop3.
9.1.3
Hardware Trigger
The ADC hardware trigger, ADHWT, is the output from the real time counter (RTC). The RTC counter
can be clocked by either ICSERCLK, ICSIRCLK or a nominal 1 kHz clock source.
The period of the RTC is determined by the input clock frequency, the RTCPS bits, and the RTCMOD
register. When the ADC hardware trigger is enabled, a conversion is initiated upon an RTC counter
overflow. The RTIE does not have to be set for RTC to cause a hardware trigger.
The RTC can be configured to cause a hardware trigger in MCU run, wait, and stop3.
9.1.4
Temperature Sensor
To use the on-chip temperature sensor, the user must perform the following:
Configure ADC for long sample with a maximum of 1 MHz clock
Convert the bandgap voltage reference channel (AD27)
— By converting the digital value of the bandgap voltage reference channel using the value of
Convert the temperature sensor channel (AD26)
— By using the calculated value of VDD, convert the digital value of AD26 into a voltage, VTEMP
Equation 9-1 provides an approximate transfer function of the on-chip temperature sensor.
TempC = 25 - ((VTEMP - VTEMP25) m
Eqn. 9-1
where:
VTEMP is the voltage of the temperature sensor channel at the ambient temperature.
VTEMP25 is the voltage of the temperature sensor channel at 25C.
m is the hot or cold voltage versus temperature slope in V/
C.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| S9S08SG4E2MTJR | 功能描述:8位微控制器 -MCU 9S08 UC W/4K 0.25UM SGF RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 安裝風格:SMD/SMT |
| S9S08SG4E2MTJRR | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| S9S08SG4E2VRSCR | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| S9S08SG4E2VSC | 制造商:Freescale Semiconductor 功能描述:9S08 UC W/ 4K 0.25UM SGF - Bulk |
| S9S08SG4E2VTG | 功能描述:8位微控制器 -MCU UC W/ 4K 0.25UM SGF RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 安裝風格:SMD/SMT |
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