ml670100 Oki Semiconductor, ml670100 Datasheet - Page 151

• Manufacturer Part Number: ml670100
• Description: Ml670100 Is A High-performance 32-bit Microcontroller
• Manufacturer: Oki Semiconductor

10.2.2
AD Control Register L (ADLCON) is an 8-bit read/write register that specifies the conversion
time (in clock cycles) per channel for the analog-to-digital converter.
After a system reset, this register contains 0x00.
ADTM
This field specifies the conversion time per channel in system clock (SYSCLK) cycles.
Note
AD Control Register L (ADLCON)
Bit Descriptions
If a conversion is underway, wait for the ADRUN bit to return to "0" before writing to this field.
If that bit is "1," changes are ignored.
7
0
Frequency Range
12.5MHz < f SYSCLK<=25MHz
6.25MHz < f SYSCLK<=12.5MHz
4MHz < f SYSCLK<=6.25MHz
The two highest settings impose upper bounds on the system clock frequency, f
SYSCLK
6
0
. Exceeding these limits produces invalid results. (See Table.)
Figure 10.3 : AD Control Register L (ADLCON)
A "0" indicates a reserved bit. Always write "0" to it.
Writing "1" produces unreliable operation.
5
0
4
0
3
Supported ADTM Settings
00, 01
00, 01, 10
00, 01, 10, 11
0
2
0
1
ADTM
ADTM Conversion time (in clock
00
01
10
11
0
cycles)per channel
339
267
146
82
10-7