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A
TEL Jack
B
EARTH
(option)
4.0V (A)
Regulator
DC Jack
4.0V
IC1
4.0V (B)
Regulator
4.0V
IC14
4.0V (B)
LED
LCD
RESn CS
A0
SCL
SI
Hook-SW
SW531
Hook
Diode Bridge
D3
Q4,Q5
DC Impedance/
AC Impedance
(option)
3.2V
Regulator
Regulator
3.2V
1.8V
Q2
Q3
CN501
CN9
COL[4-0]
Key
ROW[5-0]
LED 2
LED 5
LED 3
OPERATION
MAIN
PSTN I/F
NSA
(Public Switched
Telephone Network Interface)
(option)
10.368MHz
Xtal
Serial Pin
Hook-SW
A0
SCL
SI
74VHC574
(D_FF)
IC12
74VHC574
(D_FF)
IC13
PD1
P2[1]
PD5
4.0V
LINE OUT
LINE_IN-
ADC0-
VCC_PA
P2[7]
VCC_OC
SK
SYCL
P2[0]
SYDA
SO
SYEN
LE
CIDIN+
PD2
RXDSG
CIDIN-
SYRI
RFCLK
RDI
ADC1
RXDA
PD3
PAON
ADC2
TDO
TXDA
P2[6]
RSSI
RSSI
CIDOUT
RINGING
BBIC
AVD
IC2
LSR+
VDD
VDDRF
P3[1]
SC14429
LDO2_CTRL
MIC+
VDDIO
LDO1_SENSE
LSR-
LDO1_CTRL
CAP
MIC-
VSSRF
EEPROM
SCL2
Xtal
SDA2
JTIO
URX
RDn
UTX
WRn
ACS0
P1[4]
P3[7]
AD[18-1]
SCL1
SDA1
P0[7-3]
ACS1
OR gate
DAB[15-0]
IC8
ACS2
P1[0]
P1[1]
P3[6]
P1[5]
KX-TCD540NZM BLOCK DIAGRAM (BASE UNIT)
Pin Diode
DA1
RF1
RF
Module
SP AMP
SP
IC10
OP AMP
MIC
IC15
Handset
Jack
(128K)
IC3
OE
Flash
WE
CE
(4M)
A[17-0]
IC7
DQ[15-0]
REn
TAM
WEn
Flash
ALE
CLE
(64M)
CEn
R/Bn
IC6
I/O[7-0]
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