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參數(shù)資料
| 型號： | MC33884DW |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 6/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SWITCH SDI MONITOR 24-SOIC |
| 標(biāo)準(zhǔn)包裝： | 30 |
| 系列： | * |
| 應(yīng)用： | * |
| 接口： | * |
| 電源電壓： | * |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC |
| 包裝： | 管件 |
| 安裝類型： | 表面貼裝 |
Analog Integrated Circuit Device Data
14
Freescale Semiconductor
33884
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
RUN COMMAND
The Run command gives access to all operating modes:
Normal, Polling, and Polling + INT Timer. It allows selection
of tWAIT and tWAKE, and configures the programmable input
blocks. Bit 7 is currently unused. Note that the Run register
values are unknown after exiting the Sleep mode.
MOD[2:1] OPERATING MODE
In the Run command, the two MOD bits place the device
in one of three operating modes: Normal, Polling, and Polling
+ INT Timer.
ST[3:1] – OFF TIME BETWEEN SAMPLES (TWAIT)
During both Polling modes (with and without INT Timer
wake up, MOD2=[1]), these bits select the interval of time
(tWAIT) the Input Blocks are turned OFF; switch transitions
are not detected during the OFF interval.
WT[2:1] – WAKE UP TIME
These bits allow the device to assert an external interrupt
(INT) at the following intervals during Polling mode (MOD2 =
MOD1 = 1).
Table 7. Run Command
MSB
LSB
Command
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Run
0
1
MOD2 MOD1
ST3
ST2
ST1
—
WT2
WT1
CP4
CP3
CP2
CP1
Reset Values:
Run Register
—
U
U = Unknown value coming out of Sleep mode. It must be configured with Run command.
Table 8. Bit Definition for Run Command
Command: Run (0001) with bits [12:1]
Mode
MOD2
MOD1
ST[3:1] WT[2:1] CP[4:1]
Undefined
0
xxx
xx
CP[4:1]
Normal
0
1
xxx
xx
CP[4:1]
Polling
1
0
ST[3:1]
xx
CP[4:1]
Polling + INT
Timer
1
ST[3:1] WT[2:1] CP[4:1]
Table 9. Sample OFF Time Prescales
ST[3:1]
Multiplier
Selected
OFF Time, tWAIT (ms)
[tDETECT (4.8ms typ) x
Multiplier]
ON Time
(ms)
000
5
15 - 25
5.1 - 6.3
001
9
30 - 55
5.1 - 6.3
010
17
60 - 90
5.1 - 6.3
011
25
100 - 140
5.1 - 6.3
100
33
145 - 185
5.1 - 6.3
101
41
195 - 215
5.1 - 6.3
110
49
220 - 245
5.1 - 6.3
111
57
250 - 320
5.1 - 6.3
Table 10. Wake Up Delay Prescales
WT[2:1]
Multiplier
Selected
Wake Up Interrupt, tWAIT (ms)
[tDETECT (2.8ms typ) x Multiplier]
00
512 + 1
2400 - 3200
01
256 + 1
1200 - 1600
10
128 + 1
600 - 750
11
64 + 1
290 - 360
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