Read Panasonic KX-DT521RU Service Manual online
59
KX-DT521RU/KX-DT521RU-B
35
HSMIN
HSMICINN
I
Handset Mic negative input
36
HSMIP
HSMICINP
I
Handset Mic positive input
37
MPWR
(MICBIAS)
O
Mic power output
Pull-up to MICBIAS at 390Ω
38
SPOUTP
SPP
O
Hands free Speaker positive output
39
VCCPA
VCCA33
I
Power amplifier supply
40
SPOUTN
SPN
O
Hands free Speaker negative output
41
HSSPOUTP
HSSPOUTP
O
Handset Speaker positive output
42
LOUT
HEADSP
O
Headset Speaker output
43
PWM0
NC
O
Not in use
44
DCINS
(DG)
I
Not in use
Pull-down to DG at 47kΩ
45
XOUT
XOUT
O
Crystal oscillator connection (13.824MHz)
46
XIN
XIN
I
Crystal oscillator connection (13.824MHz)
47
VDD_APU
V1.8
O
Supply
48
VBAT_APU
VCC33
I
Supply
49
VDD_IF
VDD_IF
O
IF supply
50
VCC_FE_IF
VCC33
I
FE & IF supply
51
VCC_PA
VCC33
I
PA supply
52
BAL_OUT2
DG
O
Not in use
53
BAL_OUT1
DG
O
Not in use
54
TX_SW
DG
I
Not in use
55
ANT1
DG
I
Not in use
56
GND_RF
DG
-
Not in use
57
ANT2
DG
I
Not in use
58
TEST
TEST
I
TEST pin (Not in use)
59
RX_SW
DG
O
Not in use
60
LNA_INN
DG
I
Not in use
61
LNA_INP
DG
I
Not in use
62
ATST_N
DG
-
Not in use
63
ATST_P/EXT_LNA
DG
-
Not in use
64
RSTN
RSTN
I
Not in use
65
VCC_VCO
VCC33
I
VCO supply
66
GPIO17
SPI_DO
O
LCD Serial data
LCD control port
67
VDD2
VDD12
I
Core supply voltage
68
I2C_SCL
SCL
O
I2C Clock
I2C communication port
69
I2C_SDA
SDA
I/O
I2C Data
I2C communication port
70
GPIO2
PCM_TXD
O
PCM Send data output to IC300
PCM communication port
71
GPIO3
PCM_FSYNC
I
PCM Frame sync signal
PCM communication port
72
GPIO4
PCM_SCLK
I
PCM Clock
PCM communication port
73
VCC2
VCC33
I
Digital system power supply (+3.3V)
74
GPIO5
PCM_RXD
I
PCM Receive data input from IC300
PCM communication port
75
GPIO6
SPI2_DI
I
SPI2 Serial data input
SPI2 communication port
76
GPIO7
SPI2_DO
O
SPI2 Serial data output
SPI2 communication port
77
GPIO8
SPI2_CLK
O
SPI2 Clock
SPI2 communication port
78
GPIO9
SPI2_CS
O
SPI2 Chip select
SPI2 communication port
79
VCC3
VCC33
I
Digital system power supply (+3.3V)
80
GPI28
INTN
I
Interrupt signal input from IC300
81
GPI29
STRAP
I
Mode select (H or L)
"H: Normal mode,L: Software
download mode"
download mode"
82
TDO
JTAG_TDO
O
Not in use
For development : JTAG data
output
output
83
TDI
JTAG_TDI
I
Not in use
For development : JTAG data
input
input
84
TCK
JTAG_TCK
I
Not in use
For development : JTAG clock
input
input
85
TMS
JTAG_TMS
I
Not in use
For development : JTAG mode
selection
selection
86
RTCK
JTAG_RTCK
O
Not in use
For development : JTAG return
test clock signal input
test clock signal input
87
GPIO10
NC
O
Not in use
88
GPIO11
ST0
O
Self-diagnostic mode output
89
GPIO12
ST1
O
Self-diagnostic mode output
90
GPIO13
ST2
O
Self-diagnostic mode output
91
GPIO14
ST3
O
Self-diagnostic mode output
92
VDD3
VDD12
I
Core supply voltage
93
VCC4
VCC33
I
Digital system power supply (+3.3V)
94
GPIO15
LCD_RST
O
LCD Reset output
LCD control port
95
GPIO16
(LCD_A0)
O
LCD Register selection
LCD control port
Pin No.
Terminal Name
Function
I/O Setting Contents of Control
Remarks
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