UPD78F1502AGK-GAK-AX Datasheet, PDF (408/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 10 12-BIT A/D CONVERTER (μ PD78F150xA),
10-BIT A/D CONVERTER (μ PD78F151xA)
Figure 10-6. Timing Chart When A/D Voltage Comparator Is Used
ADCE
A/D voltage comparator operation
A/D voltage comparator
ADCS
Conversion
operation
Conversion
waiting
Conversion
operation
Conversion
stopped
Note
Note To stabilize the internal circuit, the time from the rising of the ADCE bit to the falling of the ADCS bit
must be 1 μs or longer.
Cautions 1. A/D conversion must be stopped before rewriting bits ADSCM, FR0 to FR2, LV1, and LV0 to
values other than the identical data.
2 When using the A/D converter in normal mode 2 (LV1 = 0, LV0 = 1) or low voltage mode (LV1 = 1,
LV0 = 0), enable the input gate voltage boost circuit for the A/D converter by using the analog
reference voltage control register (ADVRC), and then set ADCE and ADCS to 1. After the voltage
boost circuit stabilization time (10 μs) passes after the input gate voltage boost circuit for the A/D
converter has been enabled, set ADCS to 1.
R01UH0004EJ0501 Rev.5.01
392
Jun 20, 2011