Fujitsu F2MC-8L MB89620 Series Hardware Manual page 274

Table 13.3.2 A/D Control Register 2 (ADC2) Bits
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
MB89620 series
Bit
• The read value is indeterminate.
Unused bits
• Writing to these bits has no effect on the operation.
This bit selects the input clock used to activate the A/D conversion or sense
ADCK:
function when continuous activation is specified (EXT = "1"). Setting this bit to "0"
Input clock selection
selects the timebase timer output (divide-by-2
bit
to "1" selects the external clock input to the ADST pin.
ADIE: This bit enables or disables an interrupt request output to the CPU.
Interrupt request An interrupt request is output when both this bit and the interrupt request flag bit
enable bit (ADC1: ADI) are "1".
This bit switches between the A/D conversion function and sense function.
The A/D converter operates as the A/D conversion function when this bit is set to
ADMD: "0" and as the sense function when this bit is set to "1".
Function selection bit Check: Do not modify this bit when the conversion-in-progress bit (ADC1: ADMV)
This bit selects whether to activate the A/D conversion and sense functions by
EXT: software or to operate continuously synchronized with an input clock.
Continuous Setting this bit to "0" enables software activation by the A/D converter activation
activation enable bit bit (ADC1: AD). Setting this bit to "1" enables continuous activation on the rising
edge of the clock selected in the input clock selection bit (ADC2: ADCK).
RESV1: Check: • Always write "1" to this bit.
Reserved bit
Function
is set to "1". Also, clear the interrupt request flag bit (ADC1: ADI = "0") at
switching functions.
• The read value is always "1".
CHAPTER 13 A/D CONVERTER
8 source oscillation). Setting this bit
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