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BAT32G1x9 user manual | Chapter 15 A/D converter
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Rev.1.02
Figure15-4
Motion state Diagram while using the various modes of A/D
software trigger mode
(ADCS)
hardware trigger zero
delay mode ADCS
hardware trigger delay
mode ADCS
conversion idle
trigger idle
A/D power
ssourcde
stablization wait
time.
Note 2
conversion ongoing
conversion idle
trigger idle
conversion stops
detected hardware trigger
ADCS write
0
Auto clear to zero while A/D
conversion completes
conversion idle
conversion idle
trigger idle
conversion ongoing
conversion stops
ADCS
write
1
detected
hardware trigger
conversion idle
conversion ongoing
conversion idle
conversion stops
ADCS write
0
*Do not auto clear to zero while
A/D conversion completes
ADCS write
0
Auto clear to zero while A/D
conversion completes
ADCS
write
1
Note1
Note1
Note1: In software-triggered mode or hardware-triggered no-wait mode, the time to rise from the ADCE bit to the
ADCS bit to the ADCS bit needs to be at least 1us (TBD) to stabilize the internal circuitry.
Note2: In hardware trigger wait mode, the A/D power settling time of 1us is guaranteed by design.
Note:
1 When you want to use the hardware trigger wait mode, disable the ADCs position "1" (automatically switch to "1"
when a hardware trigger signal is detected). However, in order to set the standby state for A/D transition, the ADCS
position can be "0".
2 The ADCE bit must be rewritten when the ADCS bit is "0" (stop transition/transition standby).
3 In order to end the A/D conversion, the hardware trigger interval must be set to at least
the following times:
When hardware triggers no wait mode: 2
f
CLK
clocks
+ A/D
conversion time
When hardware triggers wait mode: 2
f
CLK
clock
+ A/D
power supply settling wait time
+ A/D
conversion time
Note
f
CLK
:
Cpu/peripheral hardware clock frequency