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參數資料
| 型號： | W742C810 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT MICROCONTROLLER |
| 中文描述： | 4-BIT, MROM, 3.58 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 2.75 MM HEIGHT, QFP-100 |
| 文件頁數： | 28/42頁 |
| 文件大小： | 501K |
| 代理商： | W742C810 |
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Preliminary W742C810
- 28 -
6.20.1 DTMF register
DTMF register is organized as a 4-bit binary register. By controlling the DTMF register, one tone of
the low/high group can be selected. The MOV DTMF,R instruction can specify the wanted tones. The
bit descriptions are as follows:
W
W
W
W
0
1
2
3
DTMF
Note: W means write only.
b3
X
X
X
X
0
0
1
1
b2
X
X
X
X
0
1
0
1
b1
0
0
1
1
X
X
X
X
b0
0
1
0
1
X
X
X
X
Selected tone
1209 Hz
1336 Hz
1477 Hz
1633 Hz
697 Hz
770 Hz
852 Hz
941 Hz
High
group
Low
group
Note: X means this bit do not care.
6.20.2 Dual Tone Control Register (DTCR)
Dual tone control register is organized as a 4-bit binary register. The output of the dual or single tone
will be controlled by this register. The MOV DTCR,#I instruction can specify the wanted status. The bit
descriptions are as follows:
W
W
W
0
1
2
3
DTCR
Note: W means write only.
Bit 0 = 1 Low group tone output is enabled.
Bit 1 = 1 High group tone output is enabled.
Bit 2 = 1 DTMF output is enabled. When Bit 2 is reset to 0, the DTMF output pin will be Hi-Z state.
Bit 3 is reserved.
6.21 MFP Output Pin (MFP)
The MFP output pin can output the Timer 1 clock or the modulation frequency; the output of the pin is
determined by mode register 1 (MR1). The organization of MR1 is shown in Figuer 6-7. When bit 2 of
MR1 is reset to "0," the MFP output can deliver a modulation output in any combination of one signal
from among DC, 4096Hz, 2048Hz, and one or more signals from among 128 Hz, 64 Hz, 8 Hz, 4 Hz, 2
Hz, or 1 Hz (when using a 32.768 KHz crystal). The MOV MFP, #I instruction is used to specify the
modulation output combination. The data specified by the 8-bit operand and the MFP output pin are
shown on the next page.
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