参数资料
型号: MB89PV630C-SH
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 10 MHz, MICROCONTROLLER, CDIP64
封装: CERAMIC, MDIP-64
文件页数: 10/153页
文件大小: 7326K
代理商: MB89PV630C-SH
MB89630 SERIES HARDWARE MANUAL
2-84
(5) Precautions for A/D converter
(a) The A/D conversion and comparison are stopped and all registers are initialized by a reset. The operat-
ing flag bit [ADMV (bit 2) of ADC1] is cleared and other bits are not changed.
(b) Activation cannot be performed by the program [AD (bit 1) of ADC1] when an external-clock start is
selected.
(c) Do not rewrite each register during conversion and comparison.
When an external-clock start is
selected, change the settings of the registers after writing 0 at EXT (bit 1) of ADC2 when operation is
stopped [ADMV (bit 2) of ADC1 is 0] to inhibit an external-clock start. However, when program starting
is selected [AD (bit 1) of ADC1], the analog input channel can be reselected and the inter rupt source for
the sense mode can be switched at reset.
(d) Switch the A/D or sense mode after clearing the ADI interrupt flag (bit 3) of ADC1.
(e) To perform continuous conversion or comparison by an external clock, provide the clock based on the
conversion or comparison time and the operation result reading time. The A/D conversion re sult is valid
until the next conversion is started. The value set in the data register in the sense mode is held without
loss by the comparison operation.
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