UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 423

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(3) A/D conversion time
(4) A/D converter operating modes
The A/D conversion time is determined by the system clock frequency (f
register (ADM).
The A/D conversion time includes the entire time required for one A/D conversion operation, and the sampling time
is also included in the A/D conversion time.
These values are shown in Table 14-1.
There are two A/D converter operating modes, scan mode and select mode. These modes are selected according
to the setting of bit 0 (MS) of the A/D converter mode register (ADM).
In addition, scan mode 0 or 1 can be selected by bit 5 (SCMD) of the ADM.
Operation in either mode continues until the ADM is rewritten.
0.25 MHz
0.25 MHz
System Clock (f
f
f
CLK
CLK
CLK
12.5 MHz
12.5 MHz
) Range
Table 14-1 A/D Conversion Time
CHAPTER 14 A/D CONVERTER
FR Bit
0
1
Conversion Time
(19 s – 120 s)
(9.6 s – 60 s)
240/f
120/f
CLK
CLK
CLK
) and the FR bit of the A/D converter mode
(3.8 s – 24 s)
(1.9 s – 12 s)
Sampling Time
48/f
24/f
CLK
CLK
383