W742S819 Datasheet, PDF (5/11 Pages) Winbond – 4-BIT TELEPHONE CONTROLLER

5. BLOCK DIAGRAM
SEG0~SEG23
COM0~COM7
RAM
(1536*4)
ROM
(12288*16
(look_up table
48K*4)
+1(+2)
PC
STACK
(16 Levels)
Tim er 0
(8 Bit)
W atch Dog
(4 Bit)
+
_
LCD
ACC
ALU
PORT
PORT
PORT
Central Control
U n it
IE F
HEF PEF
HCF EVF SEF
PSR0 SCR PR
PM0 MR0 MR1
. . . ^{P M 1 D TM F DTC R}
PORT
PORT
PORT
DTMF
G enerator
Tim er 1
(8 Bit)
M o d u la tio n
Frequency
SEL
MUX
Divider 1
(12/14 Bit)
Divider 0
(14 Bit)
+
_
Tim ing G enerator
PLL
+
_
OPP1 OPN1 OPO1 OPP2 OPN2 OPO2 OPP3 OPN3 OPO3
W742S819
RA0-3
RB0-3
RC0-3
RD0-3
RE0-3
RF0-3
DTMF
MFP
VDD
VSS
RES
XOUT
X IN
Publication Release Date: Aug. 23, 2005
-5-
Revision A1