ML620Q503/Q504 User's Manual
Chapter 25 Successive Approximation Type A/D Converter
FEUL620Q504 25-6
•
SACD1-0
(bits 5 to 4)
The SACD1-0 bits are used to set the counter frequency dividing of the SA-ADC conversion time. This
setting is the dividing value of the clock selected by the SACK bit. The clock to be input to the SA-ADC
should be 4MHz or less when OSCLK is selected, or 32.768kHz or less when LSCLK is selected. Proper
operation cannot be guaranteed if the frequency division value exceeds 4MHz when OSCLK is selected,
or 32.768kHz when the low-speed clock is selected.
This counter is designed to have an optimal conversion time for 4MHz when OSCLK is selected, or
32.768kHz when LSCLK is selected. Therefore, the conversion time is extended according to the
frequency ratio. Table 25-1 shows the relationship between the setting values of OSCLK, SACD1, and
SACD0 when OSCLK is selected.
SACD1
SACD0
Description
0
0
non-dividing
0
1
2-dividing
1
0
4-dividing (initial value)
1
1
Prohibited
Table 25-1 Relationship between OSCLK and SACD0 and SACD1 Bits
OSCLK
SACD1
SACD0
16MHz
1
0
8MHz
0
1
4MHz
0
0
[Note]
Do not change this bit during SA-ADC conversion. Operation is not guaranteed if it is changed.
Summary of Contents for LAPIS SEMICONDUCTOR ML620Q503
Page 2: ...ML620Q503 Q504 User s Manual Issue Date Apr 16 2015 FEUL620Q504 01...
Page 18: ...Chapter 1 Overview...
Page 32: ...Chapter 2 CPU and Memory Space...
Page 44: ...Chapter 3 Reset Function...
Page 50: ...Chapter 4 Power Management...
Page 70: ...Chapter 5 Interrupts...
Page 134: ...Chapter 6 Clock Generation Circuit...
Page 161: ...Chapter 7 Time Base Counter...
Page 170: ...Chapter 8 Timers...
Page 183: ...Chapter 9 Function Timer FTM...
Page 231: ...Chapter 10 Watchdog Timer...
Page 239: ...Chapter 11 Synchronous Serial Port SSIO...
Page 251: ...Chapter 12 Synchronous Serial Port with FIFO SSIOF...
Page 283: ...Chapter 13 UART...
Page 303: ...Chapter 14 UART with FIFO UARTF...
Page 327: ...Chapter 15 I2 C Bus Interface...
Page 344: ...Chapter 16 Port XT...
Page 350: ...Chapter 17 Port 0...
Page 361: ...Chapter 18 Port 1...
Page 368: ...Chapter 19 Port2...
Page 379: ...Chapter 20 Port 3...
Page 395: ...Chapter 21 Port 4...
Page 410: ...Chapter 22 Port 5...
Page 426: ...Chapter 23 Melody Driver...
Page 439: ...Chapter 24 RC Oscillation type A D Converter RC ADC...
Page 462: ...Chapter 25 Successive Approximation Type A D Converter SA ADC...
Page 479: ...Chapter 26 Analog Comparator...
Page 489: ...Chapter 27 Flash Memory Control...
Page 505: ...Chapter 28 Voltage Level Supervisor VLS...
Page 517: ...Chapter 29 LLD circuit...
Page 519: ...Chapter 30 On Chip Debug Function...
Page 522: ...Appendixes...
Page 552: ...Revision History...