參數(shù)資料
型號(hào): MC68HC05E6MFB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, QFP-44
文件頁數(shù): 106/140頁
文件大小: 1584K
代理商: MC68HC05E6MFB
A-to-D Converter
MC68HC05E6 — Rev. 1.0
A-to-D Converter
A/D registers
A/D status/control
register (ADSTAT)
COCO — Conversion complete flag
Each channel of conversion takes 32 clock cycles at fOP, where fOP is
equal to or greater than 1MHz.
1 = COCO flag is set each time a conversion is complete, allowing
the new result to be read from the A/D result data register
($10). The converter then starts a new conversion.
0 = COCO is cleared by reading the result data register or writing
to the status/control register.
Reset clears the COCO flag.
ADRC — A/D RC oscillator control
If the MCU bus frequency is less than 1MHz, an internal RC oscillator
must be used for the A/D conversion clock. This selection is made by
setting the ADRC bit in ADSTAT. The ADRC bit allows the user to
control the A/D RC oscillator.
1 = The A/D RC oscillator is turned on and, if ADON is set, the A/D
runs from the RC oscillator clock (see Table 9).
0 = The A/D RC oscillator is turned off and, if ADON is set, the A/D
runs from the CPU clock.
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
A/D status/control (ADSTAT)
$0011 COCO ADRC ADON
0
CH2
CH1
CH0 0u00 0uuu
4-adc
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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