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參數資料
| 型號： | W742C813 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 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： | 39/56頁 |
| 文件大小： | 455K |
| 代理商： | W742C813 |
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W742E/C813
Publication Release Date: December 2000
- 39 -
Revision A1
5.23.1 DTMF Register
DTMF register is organized as 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:
Note: W means write only.
W
W
W
W
0
1
2
3
DTMF
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.
5.23.2 Dual Tone Control Register (DTCR)
Dual tone control register is organized as 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:
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.
W
W
W
0
1
2
3
DTCR
5.24 MFP Output Pin (MFP)
The MFP output pin can select the output of 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 Figure 5-7.
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, 4096 Hz, 2048 Hz, and one or more signals from among 128 Hz, 64 Hz,
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