Appendix Information Of Schematic Diagram; Cpu Data (Base Unit) - Panasonic KX-TG2873BXS Service Manual

KX-TG2873BXS/KX-TGA280BXS

15 Appendix Information of Schematic Diagram

15.1. CPU Data (Base Unit)

15.1.1. BBIC (IC4)
PIN Description I/O
1 Digital Source 3.0V VDD
2 Digital GND DGN
D
3 Address bus D.O
4 Address bus D.O
5 Address bus D.O
6 Address bus D.O
7 Address bus D.O
8 Address bus D.O
9 Address bus D.O
10 ANT diversity cont D.O
11 ANT diversity cont D.O
12 RF-PA ON: SW D.O
13 Speaker output D.O
14 Non use -
15 Non use -
16 Digital Source 1.8V +1.8
V
17 Digital GND DGN
D
18 RF_CLK D.O
19 Digital Source 1.8V +1.8
V
20 Digital GND -
21 10.368 MHz IN D.I
22 Xtal ADJ-C D.I
23 Analog GND AGN
D
24 1.8V +1.8
V
25 RSSI A.I
26 RF recovery l input D.I
27 Non use -
28 RF_TX_DATA D.O
29 Address bus D.O
30 Address bus D.O
31 Address bus D.O
32 Address bus D.O
33 Address bus D.O
34 Address bus Non D.O
use
35 Address bus D.O
36 Address bus Non D.O
use
37 Address bus Non D.O
use
38 RF LOAD EN D.O
39 RF serial DATA D.O
40 RF serial CLK D.O
41 Non use D.I
42 RF_TXRX_SW D.O
43 FROM_READ D.O
44 FROM_WRITE D.O
45 Non use D.O
46 Non use D.O
47 UART TX_DATA D.O
48 UART RX_DATA D.I
49 JTAG DATA i/f D.I
50 key Scan D.I
High High_Z Low
- - -
- - -
- - H
- - H
- - H
- - H
- - H
- - H
- - H
- - O-HiZ
- - O-HiZ
ON OFF O-HiZ
ON OFF O-HiZ
- - O-HiZ
- - O-HiZ
- - -
- - -
- - L
- - -
- - -
- - I
- - I
- - -
- - -
- - I
- - I
- - I
- - Hi-Z
- - H
- - H
- - H
- - H
- - H
- - H
- - H
- - H
- - H
- - L
- - Hi-Z
- - L
- - I
TX RX O-HiZ
- READ H
- WRITE H
- - I-PU
- - H
RUN BOOT I-PU
- - I-PD
- Debug I-PU
MODE
Non Key in I-PU
PIN Description
51 key Scan
52 key Scan
53 key Scan
54 key Scan
55 Digital Source 3.0V VDD
56 Digital GND
57 AC POW_Det.
58 HOOK Det.
59 IO_CS
60 ROM_CS
61 EEPROM_Write
Protect
62 key Scan
63 Ring Det.
64 Non use
65 Non use
66 EEPROM_Clock
67 EEPROM_data
68 Data bus
69 Data bus
70 Data bus
71 Data bus
72 Data bus
73 Data bus
74 Data bus
75 Data bus
76 DG
77 Digital Source 1.8V +1.8
78 Digital Source 3.0V +3.0
79 KEYTONE
80 Line Hold Cont.
81 Non use
82 Loop Current Det.
83 LCD_CLK:115.2kH
z
84 LCD_DATA
85 Data bus
86 Data bus
87 Data bus
88 Data bus
89 Data bus
90 Data bus
91 Data bus
92 Data bus
93 Non use (Test
Mode pin)
94 Loop Control
95 Power-ON Det.
96 Non use
97 Non use
98 Non use
99 REF (0.9V)
100 TX Analog signal
101 CID Det.
102 RX Analog signal
88
I/O High High_Z
D.I Non Key in
D.I Non Key in
D.I Non Key in
D.I Non Key in
- -
DGN - -
D
D.I AC_OFF AC_ON
D.I HOOK-ON HOOK-
OFF
D.O - CS-on
D.O - CS-on
D.O Protect Write
D.I Non Key in
D.I - Ring-In
D.O - -
D.O - -
D.O - -
D.O - -
I/O - -
I/O - -
I/O - -
I/O - -
I/O - -
I/O - -
I/O - -
I/O - -
DGN - -
D
- -
V
- -
V
A.O Analog Analog
D.O Open Hold
A.I - -
A.I - -
D.O - -
D.O - -
I/O - -
I/O - -
I/O - -
I/O - -
I/O - -
I/O - -
I/O - -
I/O - -
D.I - -
D.O Line Open Loop
Close
D.I Power-on -
D.I - -
A.O - -
D.I - -
A.O - -
A.O Analog Analog
A.I Analog Analog
A.I Analog Analog
Low
I-PU
I-PU
I-PU
I-PU
-
-
I-PU
I-PU
I-PU
H
I-PU
I-PU
O-H
O-H
O-H
O-H
I
H
H
H
H
H
H
H
H
-
-
-
I
I
I
I
I
I
H
H
H
H
H
H
H
H
O-L
O-HiZ
I-PD
I-PD
O-L
I
O
O
I
I