參數(shù)資料
型號: QADCRM
英文描述: Queued Analog-to-Digital Converter Reference Manual
中文描述: 排隊模擬到數(shù)字轉(zhuǎn)換器參考手冊
文件頁數(shù): 61/122頁
文件大?。?/td> 940K
代理商: QADCRM
QADC
REFERENCE MANUAL
DIGITAL CONTROL
MOTOROLA
7-15
PSA — Prescaler Add a Clock Tic
PSA adds a system clock tic to the QCLK high time in the prescaler. The PSH and PSL
fields establish F
QCLK
. The PSA field does not change the frequency of the clock, how-
ever, it does change the duty cycle by one tic, or one half of the MCU system clock
period. The PSA bit modifies the QCLK duty cycle by adding one system clock tic to
the high time and subtracting one system clock tic from the low time.
0 = QCLK high and low times are not modified.
1 = Add one system clock half cycle to the high time of the QCLK and subtract one
system clock half cycle from the low time.
Table 7-2 Prescaler Clock High Times
PSH[8:4]
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
QCLK High Time
1 System Clock Cycle
2 System Clock Cycles
3 System Clock Cycles
4 System Clock Cycles
5 System Clock Cycles
6 System Clock Cycles
7 System Clock Cycles
8 System Clock Cycles
9 System Clock Cycles
10 System Clock Cycles
11 System Clock Cycles
12 System Clock Cycles
13 System Clock Cycles
14 System Clock Cycles
15 System Clock Cycles
16 System Clock Cycles
17 System Clock Cycles
18 System Clock Cycles
19 System Clock Cycles
20 System Clock Cycles
21 System Clock Cycles
22 System Clock Cycles
23 System Clock Cycles
24 System Clock Cycles
25 System Clock Cycles
26 System Clock Cycles
27 System Clock Cycles
28 System Clock Cycles
29 System Clock Cycles
30 System Clock Cycles
31 System Clock Cycles
32 System Clock Cycles
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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