TMP92CF30
2009-06-12
92CF30-527
AD Conversion Clock Setting Register
7 6 5 4 3 2 1 0
bit
Symbol
−
ADCLK2 ADCLK1 ADCLK0
Read/Write
R/W
Reset
State
0
0
0
0
ADCCLK
(12BFH)
Function
Always
write “0”
Select clock for AD conversion
000: Reserved 100: f
IO
/4
001: f
IO
/1 101: f
IO
/5
010: f
IO
/2 110: f
IO
/6
011: f
IO
/3 111: f
IO
/7
Note1: AD conversion is executed at the clock frequency selected in the above register. To assure conversion
accuracy, however, the conversion clock frequency must not exceed 12MHz.
Note2: Don ‘t change the clock frequency while AD conversion is in progress.
Figure 3.22.11 AD Conversion Registers
f
IO
(f
SYS
/2) <ADCLK2:0>
ADCLK
AD conversion
speed
100(fIO/4)
10.0MHZ 12
μ
sec
40MHz
101(fIO/5)
8MHZ 15
μ
sec
011(fIO/3)
10.0MHZ 12
μ
sec
30MHz
100(fIO/4)
7.5MHZ 16
μ
sec
AD conversion speed can be calculated by following.
Conversion speed
=
120
×
(1/ADCLK)
÷
1
∼
÷
7
f
SYS
<ADCLK2:0>
ADCLK
Summary of Contents for TLCS-900/H1 Series
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