參數(shù)資料
型號(hào): W925C625
英文描述: Telephone Controller
中文描述: 電話控制器
文件頁數(shù): 47/71頁
文件大?。?/td> 1055K
代理商: W925C625
W925E/C625
8-bit CID Microcontroller
Revision : A6
-47-
Release Date : 2002/7/2
Enable signal
(FTE)
Latch clock
[FSF]
Data latch Flag
(FDS)
Data
(FSKTB) bit0
FSK Signal
(DTMF pin)
1
0
1
1
0
0
Hi-Z
Hi-Z
Auto clear
Interrupt occur when rising edge
1
0
1
1
0
833us
Figure 6-12 FSK Modulator
6
5
FTM
FDS
FSK TRANSIMT CONTROL REGISTER
Bit:
Mnemonic: FSKTC
FTE:
FSK transmit Enable. Enable=1, Disable=0
FTM:
FSK signal Standard. Bellcore 202=1, V.23=0
FDS:
FSK data sending status
LO0, LO1: FSK transmit level option
FSK output level
150mV
120mV
95mV
75mV
FSK TRANSMIT DATA BUFFER
Bit:
7
FSKTB.7 FSKTB.6 FSKTB.5 FSKTB.4 FSKTB.3 FSKTB.2FSKTB.1 FSKTB.0
Mnemonic: FSKTB
FSKTB.0: Only This bit will be latched and send out as FSK signal
When FTE enable will set the FDS to high to enable the internal latch clock in 1200Hz. When
FDS is in high state, FSKTB bit0 will be sent out by FSK modulator at the rising edge of latch
clock. FDS could be cleared by software to inform no more data will be sent out after the last bit is
sent completely. If the FDS is cleared then FTE will become low at next rising latch clock to
disable FSK modulator and clear FDS by hardware automatically.
When FTE is set, FSK modulation flag (FSF) will be set at every rising edge of latch clock to
produce an interrupt shared with CID interrupt routine. If a CID interrupt occurs, user can check
FSF to know if this interrupt is caused by FSK modulator. The only way to stop FSK signal
immediately is to disable FTE by software.
(initial=00H)
2
-
Address: C6h
7
4
-
3
-
1
0
FTE
LO1
LO0
LO1
0
0
1
1
LO0
0
1
0
1
(initial=00H)
2
6
5
4
3
1
0
Address: C7h
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