參數(shù)資料
型號: MC68CK338
廠商: Motorola, Inc.
元件分類: 32位微控制器
英文描述: Highly Integrated, Low-Power, 32-Bit Microcontroller
中文描述: 高度集成,低功耗,32位微控制器
文件頁數(shù): 97/133頁
文件大?。?/td> 798K
代理商: MC68CK338
MC68CK338
MC68CK338TS/D
MOTOROLA
97
SDATA and SDATB are the data registers associated with SASM channels A and B, respectively. In IC
mode, SDATA and SDATB contain the last captured value. In the OC, OCT and OP modes, SDATA
and SDATB are loaded with the value of the next output compare.
6.10 Double-Action Submodule (DASM)
The double-action submodule (DASM) provides two 16-bit input capture or two 16-bit output compare
functions that can occur automatically without software intervention. The input edge detector is pro-
grammable to cause the capture function to occur on user-specified edges. The output flip flop is set by
one of the output compare signals and reset by the other one. The DASM input capture and the output
compare modes may optionally generate interrupts. Software determines which of the two incoming
time-base buses is used for input captures or output compares.
Six operating modes allow software to use DASM input capture and output compare functions to per-
form pulse-width measurement, period measurement, single pulse generation, and continuous pulse
width modulation, as well as standard input capture and output compare. The DASM can also work as
a single I/O pin. DASM operation is determined by the mode select bit field MODE[3:0] in the DASM
status/interrupt/control (DASMSIC) register.
Table 58
shows the different DASM modes of operation.
Table 57 SASM Operating Mode Select
MODE1
0
0
1
1
MODE2
0
1
0
1
SASM Channel Operating Mode
Input capture (IC)
Output port (OP)
Output compare (OC)
Output compare and toggle (OCT)
S12DATA, S14DATA —
SASM Data Register A
S18DATA, S24DATA —
SASM Data Register A
$YFF462, $YFF472
$YFF492, $YFF4C2
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESET:
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
S12DATB, S14DATB —
SASM Data Register B
S18DATB, S24DATB —
SASM Data Register B
$YFF464, $YFF474
$YFF494, $YFF4C4
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESET:
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
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