參數(shù)資料
型號(hào): HD404654
廠商: Hitachi,Ltd.
英文描述: RESISTOR, 0.10 OHM 5W
中文描述: 4位單片機(jī)
文件頁數(shù): 80/109頁
文件大小: 430K
代理商: HD404654
HD404654 Series
80
Tone Generator Mode Register (TGM: $019):
Four-bit write-only register, which controls output
frequencies as shown in figure 65, and is reset to $0 by MCU reset.
Bit
Initial value
Read/Write
Bit name
3
0
W
TGM3
2
0
W
TGM2
0
0
W
TGM0
1
0
W
TGM1
Tone generator mode register (TGM: $019)
TGM3
0
0
1
1
TGM2
0
1
0
1
TONEC output frequencies
f (1,209 Hz)
f (1,336 Hz)
f (1,477 Hz)
f (1,633 Hz)
TGM1
0
0
1
1
TGM0
0
1
0
1
TONER output frequencies
f (697 Hz)
f (770 Hz)
f (852 Hz)
f (941 Hz)
Figure 65 Tone Generator Mode Register (TGM)
Tone Generator Control Register (TGC: $01A):
Three-bit write-only register, which controls the
start/stop of the DTMF signal output as shown in figure 66, and is reset to $0 by MCU reset. TONER and
TONEC output can be independently controlled by bits 2 and 3 (TGC2, TGC3), and the DTMF circuit is
controlled by bit 1 (TGC1) of this register.
Bit
Initial value
Read/Write
Bit name
3
0
W
TGC3
2
0
W
TGC2
0
Not used
1
0
W
TGC1
Tone generator control register (TGC: $01A)
TGC1
0
1
DTMF enable bit
DTMF disable
DTMF enable
TGC3
0
1
TONEC output control (column)
No output
TONEC output (active)
TGC2
0
1
TONER output control (row)
No output
TONER output (active)
Figure 66 Tone Generator Control Register (TGC)
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