參數(shù)資料
型號(hào)： HD404618FS
廠商： Hitachi,Ltd.
英文描述： 4-Bit Single-Chip Microcomputer
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 64/89頁(yè)
文件大?。?/td> 358K
代理商： HD404618FS
HD404618 Series
64
Table 31 Tone Generator Control Register
TGC
Bit 1
DTMF Enable Bit
0
DTMF disabled
1
DTMF enabled
TGC
Bit 2
TONER Output Control (row)
0
Stopped
1
TONER output (active)
TGC
Bit 3
TONEC Output Control (column)
0
Stopped
1
TONEC output (active)
Tone Generator Speed Flag (TGSP: $020,Bit 2):
One-bit register which can be set and reset by the
SEM/REM and SEMD/REMD instructions. The DTMF generation circuit generates output frequencies
with a 400-kHz clock (table 30). With an 800-kHz clock, the DTMF generation circuit generates these
same frequencies by pulling the TGSP flag high.
DTMF Output:
The sine waves of the row-group and column-group are individually converted from
digital to analog in the D/A conversion circuit, which provides high-precision ladder resistance. The
DTMF output pins, TONER and TONEC, transmit the sine waves of the row-group and column-group,
respectively. Figure 41 shows thetone output equivalent circuit. Figure 42 shows the output waveform.
One cycle of this wave consists of 32 time slots, making the output waveform stable with little distortion.
Table 32 lists the frequency deviation of the MCU from standard DTMF signals.
VT
ref
GND
Switch control
TONER
TONEC
Figure 41 Tone Output Equivalent Circuit
相關(guān)PDF資料
PDF描述
HD404618H 4-Bit Single-Chip Microcomputer
HD404618TF 4-Bit Single-Chip Microcomputer
HD4074618 4-Bit Single-Chip Microcomputer
HD4074618FS CONNECTOR
HD4074618H 4-Bit Single-Chip Microcomputer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404618H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404618SERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HD404618TF 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD4046212FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4046212H 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*