参数资料
型号: MB90654APFV
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP100
封装: PLASTIC, LQFP-100
文件页数: 75/106页
文件大小: 873K
代理商: MB90654APFV
MB90650A Series
70
16. DTMF Generator
The DTMF (dual tone multifrequency) generator is a module that can generate a series of audio tones as heard
from a push-button telephone or a radio transceiver with a keypad. It has the following features:
Capable of generating DTMF tones continuously (or even a single tone)
Capable of generating all CCITT tones: 0 to 9, *, #, A to D
(1) Register list
(2) Block diagram
DTMF control register (DTMC)
Address : 000088H
CSL2
CSL1
CSL0
CDIS
RDIS
OUTE
R/W
Initial value
00000000 B
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W
DTMF data register (DTMD)
Address : 000089H
————
DDAT3 DDAT2 DDAT1
R/W
Initial value
000X0000 B
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
R/W
R/W
: Read/write enabled
: Unused
X : Undefined
DDAT0
R/W
——
DTMF
Internal clock
Frequency divider
ROW/COL
decoder
Preset counter
DTMF data register (DTMD)
Clock pulse
Frequency
select
Frequency
select
Terminate
Control signal generator
Count clock
COL staircase
generator
ROW staircase
generator
DTMF control register (DTMC)
Internal bus
Voltage data
Adder
Frequency
divider
Frequency
select
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