參數(shù)資料
型號: W925C625
英文描述: Telephone Controller
中文描述: 電話控制器
文件頁數(shù): 45/71頁
文件大小: 1055K
代理商: W925C625
W925E/C625
8-bit CID Microcontroller
Revision : A6
-45-
Release Date : 2002/7/2
C1
C2
C3
C4
Data output
SF1
Ins.
P4.1
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
SEDG=1, falling changed
NOTE: The serial clock frequency is fosc/2
Figure 6-9 Timing of the Serial Port 1 Output Function
6.10 Comparator
SEDG=0, rising changed
serial out
instruction
A built-in comparator to compare the analog signal. There is a analog input paths from pin VNEG.
Two reference inputs, one is from pin VPOS and other is from regulator output. When the voltage
of positive input is higher than the negative input, the comparator output will be high. The
RESEC(COMPR.3) is the result of the comparison. An internal rising signal on RESC produces
interrupt flag of COMPF (EXIF.4). The flag COMPF is cleared when comparator interrupt routine
is executed or cleared by software. Set COMPEN to enable the comparator function.
D
CK
Clr
C3
RESET
D
CK
Clr
RESC
COMPF=0
EXIF.4
(COMPF)
COMPEN
VNEG(P4.2)
VPOS(P4.4)
REF1
X.XV
REGULATOR
EN
SCON1.5(REGON)
REF
Figure 6-10 The Configuration of Comparator
6.11 DTMF Generator
W925E/C625 provides a DTMF generator which outputs the dual tone multi-frequency signal to
the DTMF pin. The DTMF generator can work well at the operating frequency of 3.58MHz. A
DTMF generator register DTMFG controls the DTMF output and specifies the desired low/high
frequency. The tones are divided into two groups (low group and high group). When the
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