Panasonic KX-MB2110RUW / KX-MB2130RUW / KX-MB2170RUW / KX-MB2117RUB / KX-MB2137RUB / KX-MB2177RUB Service Manual ▷ View online
29
KX-MB2110RUW/ KX-MB2130RUW/ KX-MB2170RUW/ KX-MB2117RUB/ KX-MB2137RUB/ KX-MB2177RUB
AE18
ASPCLK
I
NCU Interface
AD18
ATXD
Tri-O
NCU Interface
AC18
ARXD
I
NCU Interface
AF20
BBITCLK
I
NCU Interface
AE20
BSPCLK
I
NCU Interface
AD20
BTXD
Tri-O
NCU Interface
AC20
BRXD
I
NCU Interface
AE19
AFERST
O
NCU Interface
AF19
AFECLK
O
NCU Interface
AD17
RING
I
NCU Interface
AF21
DP
O
NCU Interface
AF17
EYECLK
O
NOT USED
AE17
EYEDAT
O
NOT USED
AD19
AFESEL0
I
GND
AC19
AFESEL1
I
GND
R4
DBGREQ
I
NOT USED
T3
DBGMOD
O
NOT USED
Y3
MDM_TDO
Tri-O
NOT USED
Y2
MDM_TMS
I
NOT USED
W4
MDM_TRSTN
I
NOT USED
Y1
MDM_TCK
I
NOT USED
AA1
MDM_TDI
I
NOT USED
AE12
SCLKIN
I
CRYSTAL(24MHz) INPUT
AF12
SCLKOUT
O
CRYSTAL(24MHz) OUTPUT
AF25
MDMCLKIN
I
CRYSTAL(24.576MHz) INPUT
AE24
MDMCLKOUT
O
CRYSTAL(24.576MHz) OUTPUT
A18
DOTCLKIN
I
CLOCK(26MHz) INPUT (KX-MB21*7 ONLY)
CRYSTAL(26MHz) INPUT (KX-MB21*0 ONLY)
CRYSTAL(26MHz) INPUT (KX-MB21*0 ONLY)
B18
DOTCLKOUT
O
NOT USED (KX-MB21*7 ONLY)
CRYSTAL(26MHz) OUTPUT (KX-MB21*0 ONLY)
CRYSTAL(26MHz) OUTPUT (KX-MB21*0 ONLY)
AE8
RTCCLKIN
I
CRYSTAL(32.768MHz) INPUT
AF8
RTCCLKOUT
O
CRYSTAL(32.768MHz) OUTPUT
AD7
RTCPWRDWN
I
RTC RESET
AF6
NBATRST
I
RTC RESET
AE15
CPU_TDI
I
NOT USED
AE16
CPU_TMS
I
NOT USED
AF15
CPU_TCK
I
NOT USED
AF16
CPU_TRSTN
I
NOT USED
AD15
CPU_TDO
Tri-O
NOT USED
R2
DSP_TDI
I
NOT USED
P2
DSP_TMS
I
NOT USED
R1
DSP_TCK
I
NOT USED
R3
DSP_TRSTN
I
NOT USED
P1
DSP_TDO
Tri-O
NOT USED
C21
THRMSTR0
I
Analog Input (THRMISTOR)
C20
THRMSTR1
I
Analog Input (THRMISTOR)
A19
TONE
O
Analog Output (Speaker)
B20
ADVREF
I
GND
C19
DAVREFP
I
GND
A20
DAVREFN
I
GND
N1
NRST
I
Reset
N2
NWDTRST
Tri-O
Watch Dog Timer Reset Signal
AD16
TEST
I
NOT USED
AC15
TEST_MODE
I
GND
Y23
CLKSEL0
I
GND
W23
CLKSEL1
I
GND
V23
CLKSEL2
I
GND
T23
CLKSEL3
I
3.3V
R23
CLKSEL4
I
GND
AC16
BYPASS
I
GND
N3
BOOTMOD
I
NOT USED
D21
AD_AVDD25
-
2.5VA Power Supply for A/D
D19
DA_AVDD25
-
2.5VA Power Supply for D/A
AF7
BAT_DVDD
-
3.3V Power Supply for RTC
AE7
BAT_VDD
-
1.2V Power Supply for RTC
AC21
PLL2_DVDD
-
2.5VA Power Supply for PLL
D18
PLL3_DVDD
-
2.5VA Power Supply for PLL
Pin No.
Pin Name
I/O
Description
30
KX-MB2110RUW/ KX-MB2130RUW/ KX-MB2170RUW/ KX-MB2117RUB/ KX-MB2137RUB/ KX-MB2177RUB
AF10
PRG_AVDD
-
3.3V Power Supply
AC9
SSPLL_VDDA
-
1.2VA Power Supply for PLL
AC10
PRG_VOUT12
-
1.2VA output
AC11
PRG_VOUT25
-
2.5VA output
AC12
USB1_AVDD25
-
2.5VA Power Supply for USB1
AF14
USB1_AVDD33
-
3.3V Power Supply for USB1
AA4
USB2_AVDD25
-
2.5VA Power Supply for USB2
AD1
USB2_AVDD33
-
3.3V Power Supply for USB2
V4
USB3_AVDD25
-
2.5VA Power Supply for USB3
W1
USB3_AVDD33
-
3.3V Power Supply for USB3
AA23
VDD12
-
1.2V Power Supply
AB4
VDD12
-
1.2V Power Supply
AC6
VDD12
-
1.2V Power Supply
AC13
VDD12
-
1.2V Power Supply
AC17
VDD12
-
1.2V Power Supply
AC22
VDD12
-
1.2V Power Supply
D6
VDD12
-
1.2V Power Supply
D10
VDD12
-
1.2V Power Supply
D15
VDD12
-
1.2V Power Supply
D22
VDD12
-
1.2V Power Supply
E23
VDD12
-
1.2V Power Supply
F4
VDD12
-
1.2V Power Supply
L23
VDD12
-
1.2V Power Supply
N4
VDD12
-
1.2V Power Supply
N23
VDD12
-
1.2V Power Supply
T4
VDD12
-
1.2V Power Supply
AC8
VDDIO33
-
3.3V Power Supply
AC14
VDDIO33
-
3.3V Power Supply
D5
VDDIO33
-
3.3V Power Supply
D11
VDDIO33
-
3.3V Power Supply
D17
VDDIO33
-
3.3V Power Supply
F23
VDDIO33
-
3.3V Power Supply
K4
VDDIO33
-
3.3V Power Supply
P4
VDDIO33
-
3.3V Power Supply
U23
VDDIO33
-
3.3V Power Supply
AA3
VSS
-
GND
AB3
VSS
-
GND
AB23
VSS
-
GND
AC3
VSS
-
GND
AC4
VSS
-
GND
AC5
VSS
-
GND
AC23
VSS
-
GND
AD3
VSS
-
GND
AD9
VSS
-
GND
AD11
VSS
-
GND
AD12
VSS
-
GND
AD13
VSS
-
GND
AD14
VSS
-
GND
AD22
VSS
-
GND
AD24
VSS
-
GND
AE2
VSS
-
GND
AE25
VSS
-
GND
B2
VSS
-
GND
B19
VSS
-
GND
B25
VSS
-
GND
C3
VSS
-
GND
C18
VSS
-
GND
C24
VSS
-
GND
D4
VSS
-
GND
D20
VSS
-
GND
D23
VSS
-
GND
E4
VSS
-
GND
L4
VSS
-
GND
L11
VSS
-
GND
L12
VSS
-
GND
L13
VSS
-
GND
L14
VSS
-
GND
Pin No.
Pin Name
I/O
Description
31
KX-MB2110RUW/ KX-MB2130RUW/ KX-MB2170RUW/ KX-MB2117RUB/ KX-MB2137RUB/ KX-MB2177RUB
L15
VSS
-
GND
L16
VSS
-
GND
M4
VSS
-
GND
M11
VSS
-
GND
M12
VSS
-
GND
M13
VSS
-
GND
M14
VSS
-
GND
M15
VSS
-
GND
M16
VSS
-
GND
N11
VSS
-
GND
N12
VSS
-
GND
N13
VSS
-
GND
N14
VSS
-
GND
N15
VSS
-
GND
N16
VSS
-
GND
P11
VSS
-
GND
P12
VSS
-
GND
P13
VSS
-
GND
P14
VSS
-
GND
P15
VSS
-
GND
P16
VSS
-
GND
R11
VSS
-
GND
R12
VSS
-
GND
R13
VSS
-
GND
R14
VSS
-
GND
R15
VSS
-
GND
R16
VSS
-
GND
T11
VSS
-
GND
T12
VSS
-
GND
T13
VSS
-
GND
T14
VSS
-
GND
T15
VSS
-
GND
T16
VSS
-
GND
U3
VSS
-
GND
U4
VSS
-
GND
V3
VSS
-
GND
W3
VSS
-
GND
Y4
VSS
-
GND
Pin No.
Pin Name
I/O
Description
32
KX-MB2110RUW/ KX-MB2130RUW/ KX-MB2170RUW/ KX-MB2117RUB/ KX-MB2137RUB/ KX-MB2177RUB
6.3.2.
RTC Backup Circuit
1. Function
This unit has a lithium battery (BAT300) which works for the Real Time Clock IC (RTC: inside IC300).
The RTC continues to work, backed up by a lithium battery even when the power switch is OFF.
*RTC:(Real Time Clock)
Chip for the clock mounted on the motherboard.
Receiving power supply to operate even while the power is off unlike the other chips on the motherboard.
The RTC continues to work, backed up by a lithium battery even when the power switch is OFF.
*RTC:(Real Time Clock)
Chip for the clock mounted on the motherboard.
Receiving power supply to operate even while the power is off unlike the other chips on the motherboard.
2. RTC Inside (IC300) Backup Circuit Operation
When the power switch is turned ON, power is supplied to the RTC (inside IC300). At this time, the voltage at pin AF7 of the
IC300 is +3.3V. When the power switch is turned OFF, the BAT300 supplies power to RTC through DA300.
When the power switch is OFF and the voltage of +3.3V decreases, pin AF7 of RTC (IC300) becomes roughly the same volt-
age as the battery voltage. RTC goes into the backup mode, in which the power consumption is lower.
IC300 is +3.3V. When the power switch is turned OFF, the BAT300 supplies power to RTC through DA300.
When the power switch is OFF and the voltage of +3.3V decreases, pin AF7 of RTC (IC300) becomes roughly the same volt-
age as the battery voltage. RTC goes into the backup mode, in which the power consumption is lower.
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