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MSM66591/ML66592 User's Manual
Chapter 16 A/D Converter Functions
16.1 Configuration of A/D Converter
Since the basic configurations of the A/D converter 0 and the A/D converter 1 are the
same, this section chiefly explains the configuration of A/D converter 0.
The A/D converter has three operation modes: scan mode, select mode, and hard
select mode.
[1]
Scan Mode
In scan mode, A/D conversion is sequentially performed from any channel out of ch0–
ch11 to ch11 (from any of ch12–ch23 to ch23 for A/D converter 1). The scan mode is
mainly controlled by the A/D control register L (ADCON0L, ADCON1L). In scan mode,
the scan mode provides the selection whether to stop A/D conversion at the end of A/D
conversion for ch11 (ch23 for A/D converter 1) or to restart A/D conversion automati-
cally from the first channel specified.
[2]
Select Mode
In select mode, any channel of ch0–ch11 (any of ch12–ch23 for A/D converter 1) is
specified, and A/D conversion is performed for the specified channel. The select mode
is mainly controlled by the A/D control register H (ADCON0H, ADCON1H).
It is also possible to operate select mode during scan mode operation. In this case, A/D
conversion for a channel that A/D conversion is progressing for in scan mode, is
suspended at that point when select mode is specified, and A/D conversion for the
channel specified in select mode is performed. When A/D conversion in select mode
ends, A/D conversion in scan mode restarts from the suspended channel.
ch0
ch1
ch2
ch2
ch3
ch4
q
w
A/D conversion in scan mode
A/D conversion in select mode
q
A/D conversion for ch2 is suspended.
A/D conversion for ch4 in select mode starts.
A/D conversion for ch4 ends.
A/D conversion from ch2 in scan mode restarts.
w
Figure 16-3 Timing Diagram During Select Mode Operation in Scan Mode
[3]
Hard Select Mode
The hard select mode specifies a channel from ch0 to ch3 (from ch12 to ch15 for A/D
converter 1) and performs A/D conversion of the channel when an interrupt request is
generated.
Summary of Contents for ML66592
Page 15: ...Contents 12 ...
Page 17: ......
Page 18: ...Overview Chapter 1 1 ...
Page 19: ......
Page 30: ...Description of Pins Chapter 2 2 ...
Page 31: ......
Page 44: ...CPU Architecture Chapter 3 3 ...
Page 45: ......
Page 101: ...3 56 MSM66591 ML66592User sManual Chapter 3 CPU Architecture ...
Page 102: ...CPU Control Functions Chapter 4 4 ...
Page 103: ......
Page 111: ...4 8 MSM66591 ML66592User sManual Chapter 4 CPU Control Functions ...
Page 112: ...Memory Control Functions Chapter 5 5 ...
Page 113: ......
Page 117: ...5 4 MSM66591 ML66592User sManual Chapter 5 Memory Control Functions ...
Page 118: ...Port Functions Chapter 6 6 ...
Page 119: ......
Page 152: ...Output Pin Control Pin OE Chapter 7 7 ...
Page 153: ......
Page 155: ...7 2 MSM66591 ML66592User sManual Chapter 7 Output Pin Control Pin OE ...
Page 156: ...Clock Generation Circuit Chapter 8 8 ...
Page 157: ......
Page 160: ...Time Base Counter TBC Chapter 9 9 ...
Page 161: ......
Page 164: ...Watchdog Timer WDT Chapter 10 10 ...
Page 165: ......
Page 170: ...Flexible Timer FTM Chapter 11 11 11 ...
Page 171: ......
Page 213: ...11 42 MSM66591 ML66592User sManual Chapter 11 Flexible Timer FTM ...
Page 214: ...General Purpose 8 Bit Timer Function Chapter 12 12 ...
Page 215: ......
Page 223: ...12 8 MSM66591 ML66592User sManual Chapter 12 General Purpose 8 Bit Timer Function ...
Page 224: ...PWM Functions Chapter 13 13 ...
Page 225: ......
Page 244: ...Baud Rate Generator Functions Chapter 14 14 ...
Page 245: ......
Page 263: ...14 18 MSM66591 ML66592User sManual Chapter 14 Baud Rate Generator Functions ...
Page 264: ...Serial Port Functions Chapter 15 15 ...
Page 265: ......
Page 348: ...A D Converter Functions Chapter 16 16 ...
Page 349: ......
Page 381: ...16 32 MSM66591 ML66592User sManual Chapter 16 A D Converter Functions ...
Page 382: ...Transition Detector Functions Chapter 17 17 ...
Page 383: ......
Page 387: ...17 4 MSM66591 ML66592User sManual Chapter 17 Transition Detector Functions ...
Page 388: ...Peripheral Functions Chapter 18 18 ...
Page 389: ......
Page 392: ...External Interrupt Request Function Chapter 19 19 ...
Page 393: ......
Page 396: ...Interrupt Request Processing Function Chapter 20 20 ...
Page 397: ......
Page 407: ...20 10 MSM66591 ML66592User sManual Chapter 20 Interrupt Request Processing Function ...
Page 408: ...Bus Port Functions Chapter 21 21 ...
Page 409: ......
Page 413: ...21 4 MSM66591 ML66592User sManual Chapter 21 Bus Port Functions ...
Page 414: ...Expansion Port Chapter 22 22 ...
Page 415: ......
Page 420: ...Serial Port with FIFO SCI5 Chapter 23 23 ...
Page 421: ......
Page 431: ...23 10 MSM66591 ML66592User sManual Chapter 23 Serial Port with FIFO SCI5 ...
Page 432: ...RAM Monitor Function Chapter 24 24 ...
Page 433: ......
Page 441: ...24 8 MSM66591 ML66592User sManual Chapter 24 RAM Monitor Function ...
Page 442: ...25 Electrical Characteristics Chapter 25 ...
Page 443: ......
Page 458: ...Package Dimensions Chapter 26 26 ...
Page 459: ......
Page 461: ...26 2 MSM66591 ML66592User sManual Chapter 26 Package Dimensions ...
Page 462: ...Revision History Chapter 27 27 ...
Page 463: ......
Page 465: ...27 2 MSM66591 ML66592User sManual Chapter 27 Revision History ...