ML620Q503/Q504 User's Manual
Chapter 24 RC Oscillation Type A/D Converter
FEUL620Q504 24-15
Figure 24-6 Operation Timing in Counter A Reference Mode
(2)
Operation in Counter B reference mode
Figure 24-7 shows the operation timing in Counter B reference mode.
Following is an example of operation procedure in Counter B reference mode:
Preset to Counter B (RADCB0 and RADCB1) the value obtained by subtracting the count value “nB1”
from the maximum value + 1 (1000000H). The product of the count value “nB1” and the RCCLK clock
cycle indicates the gate time.
k
Preset “000000H” in Counter A (RADCA0 and RADCA1).
l
Set the OM3–OM0 bits of RADMOD to desired oscillation mode. (See Table 24-1)
Set the RADI bit of RADMOD to “1” to specify generating of an interrupt request signal by Counter B
overflow.
n
Set the RARUN bit of RADCON to “1” to start A/D conversion.
When the RARUN bit is set to “1” and the RCON signal (signal synchronized with the fall of the base clock) is
set to”1”, the RC oscillator circuit starts operation and Counter B starts counting of the RC oscillator clock
(RCCLK). When Counter B overflows, the RARUN bit is automatically reset (
o
) and conversion operation
terminates. At the same time, an RC-ADC interrupt request (RADINT) occurs. (
p
)
RARUN
BSCLK
t
BSCLK
RCON
Counter A
(100000H-nA0)
(+1)
(+2)
(+3)
0FFFFFCH
0FFFFFDH
0FFFFFEH
0FFFFFFH
0000000H
Overflow
000000H
000001H
000002H
nB0-2
nB0-1
nB0
RCCLK
Counter B
CR oscillator circuit
Input waveform
IN0/IN1
t
RCCLK
Gate time
nA0 • t
BSCLK
nB0 • t
RCCLK
RADINT
(Interrupt)
Request
nA0 : Reference count value
nB0 : Measurement count
Содержание LAPIS SEMICONDUCTOR ML620Q503
Страница 2: ...ML620Q503 Q504 User s Manual Issue Date Apr 16 2015 FEUL620Q504 01...
Страница 18: ...Chapter 1 Overview...
Страница 32: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 50: ...Chapter 4 Power Management...
Страница 70: ...Chapter 5 Interrupts...
Страница 134: ...Chapter 6 Clock Generation Circuit...
Страница 161: ...Chapter 7 Time Base Counter...
Страница 170: ...Chapter 8 Timers...
Страница 183: ...Chapter 9 Function Timer FTM...
Страница 231: ...Chapter 10 Watchdog Timer...
Страница 239: ...Chapter 11 Synchronous Serial Port SSIO...
Страница 251: ...Chapter 12 Synchronous Serial Port with FIFO SSIOF...
Страница 283: ...Chapter 13 UART...
Страница 303: ...Chapter 14 UART with FIFO UARTF...
Страница 327: ...Chapter 15 I2 C Bus Interface...
Страница 344: ...Chapter 16 Port XT...
Страница 350: ...Chapter 17 Port 0...
Страница 361: ...Chapter 18 Port 1...
Страница 368: ...Chapter 19 Port2...
Страница 379: ...Chapter 20 Port 3...
Страница 395: ...Chapter 21 Port 4...
Страница 410: ...Chapter 22 Port 5...
Страница 426: ...Chapter 23 Melody Driver...
Страница 439: ...Chapter 24 RC Oscillation type A D Converter RC ADC...
Страница 462: ...Chapter 25 Successive Approximation Type A D Converter SA ADC...
Страница 479: ...Chapter 26 Analog Comparator...
Страница 489: ...Chapter 27 Flash Memory Control...
Страница 505: ...Chapter 28 Voltage Level Supervisor VLS...
Страница 517: ...Chapter 29 LLD circuit...
Страница 519: ...Chapter 30 On Chip Debug Function...
Страница 522: ...Appendixes...
Страница 552: ...Revision History...