W925E240 Datasheet, PDF (49/73 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925E/C240
Enable signal
(FTE)
Latch clock
[FSF]
Data latch Flag
(FDS)
Data
(FSKTB) bit0
Interrupt occur when rising edge
Auto clear
101100
FSK Signal
(DTMF pin)
Hi-Z
1 01 1
833us
Hi-Z
0
Figure 6-12 FSK Modulator
FSK TRANSIMT CONTROL REGISTER
Bit:
7
6
5
4
FTE FTM FDS
-
Mnemonic: FSKTC
(initial = 00H)
3
2
1
0
-
-
LO1 LO0
Address: C6h
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
LO1
LO0
150mV
0
0
120mV
0
1
95mV
1
0
75mV
1
1
FSK TRANSMIT DATA BUFFER
(initial=00H)
Bit:
7
6
5
4
3
2
1
0
FSKTB.7 FSKTB.6 FSKTB.5 FSKTB.4 FSKTB.3 FSKTB.2 FSKTB.1 FSKTB.0
Mnemonic: FSKTB
FSKTB.0:Only this bit will be latched and send out as FSK signal
Address: C7h
- 49 -
Publication Release Date: July 12, 2005
Revision A10