Panasonic KX-TG2873BXS

90
KX-TG2873BXS/KX-TGA280BXS
15.2. CPU Data (Cordless Handset)
15.2.1. BBIC (IC1)
PIN Description I/O High High_Z Low
1 Key Scan D.I Non key in I-PU
2 Digital IO Source
2.5V
VDD - - -
3 Digital Power
Source 1.8V
VDD - - -
4 Digital GND DGN
D
-- -
5 EEPROM Write
Protect
D.O Write
enable
Read I-PU
6 LCD Register
Select
D.O Data Instruction I-PU
7 LED Control D.O LED_OFF LED_ON I
8 Regulator Control D.O ON OFF I-PD
9 LCD Serial Data D.O * - I
10 LCD Serial Clock D.O * - I
11 LCD Reset D.O L Reset O-1
12 Key Scan D.I Non key in I-PU
13 Analog (TDO,
RSSI, FDA)
Source 1.8V
+1.8
V
-- -
14 Analog GND (AVD) AGN
D
-- -
15 Xtal Freq Adjust D.I - - I
16 Xtal: 10.368 MHz
Input
D.I - - I
17 GND (RFCLK, Xtal
oscillator)
GND - - -
18 NC O - - Hi-Z + PU
19 RSSI input A.I - - Hi-Z + PU
20 RFCLK Xtal oscil-
lator Source 1.8V
+1.8
V
-- -
21 RF CLK OUT D.O * * O-0
22 RF TX DATA D.O * *
23 RF RX DATA D.I * * I
24 RF SCLK D.O * * O-0
25 RF SDATA D.O * * I-PD
26 RF LOAD EN D.O * * O-0
27 Key Scan D.O Non key in I-PD
28 SP-AMP Mute con-
trol
D.O Mute I-PD
29 GND (CLASSD
power amplifier)
GND - - -
30 CLASSD positive
output
A.O * * O
31 CLASSD audio
amplifier Source
VBA
T
-- -
32 CLASSD negative
output
A.O * * O
33 GND (CLASSD
power amplifier)
GND * * -
34 RF TXRX switch D.O TX RX I-PD
35 RF PA ON/OFF
SW
D.O ON OFF I-PD
36 LCD(KEY)LED
control
D.O ON OFF I-PD
37 Digital GND DGN
D
-- -
38 Digital IO Source
2.5V
+2.5
V
-- -
39 Digital Source 1.8V +1.8
V
-- -
40 Key Scan D.I Non key in I-PU
41 Mode control/
UART TX data
D.O RST↑:
usually
mode
RST↑:
Boot mode
I-PU
42 UART RX data D.I * * I-PU
43 Mode control/JTAG
i/f
D.I RST↑:
usually
mode
RST↑:
Debug
mode
I-PU
44 EEPROM Serial
Data
D.O * * I-PU
45 EEPROM Serial
Clock
D.O * * I-PU
46 Key Scan D.O Non key in I-PU
47 Key Scan D.O Non key in I-PU
48 Key Scan D.O Non key in I-PU
49 Digital GND DGN
D
-- -
50 Digital IO Source
1.8V
+1.8
V
-- -
51 NC D.I - - I
52 Charger Detect D.I Charger
on
No Cagier I-PD
53 Reset D.I - - I-PU
54 DC/DC converter
filter output
D.O - - O
55 DC control current
sense input
D.I - - I
56 Switching clock for
the DC/DC
D.O - - O-PD
57 Sensor input for
DC/DC
D.I - - I
58 VBAT voltage
monitor
A.I A/D A/D I
59 Regulator 1 con-
trol output
D.O Active - O-1
60 Regulator 2 con-
trol output
D.O Active - O-0
61 Power ON D.I Active - I-PD
62 Charge control D.O Stop Charge On O-0
63 Low drop regula-
tor 1 sense input.
D.I - - I
64 Analog GND
(AVD2)
AGN
D
-- -
65 Analog Power
source 1.8V
+1.8
V
-- -
66 Receiver output
(Negative)/(SP-
out)
A.O Analog Analog O
67 Receiver output
(Positive)
A.O Analog Analog O
68 MIC in (Negative) A.I Analog Analog I
69 MIC Refer-
ence(Negative)
A.O - - O
70 Voltage reference
1.5V
A.O - - O
71 Signal ground 0.9V A.O - - O
72 MIC in (Positive) A.I Analog Analog I
73 MIC BIAS(Posi-
tive)
A.O - -
74 Key Scan D.O Non key in I-PD
75 Key Scan D.I Non key in I
76 Key Scan D.I Non key in I
77 LCD Chip Select D.O Disable Enable I-PD
78 Sense input for
ADC3.
A.I - - I
PIN Description I/O High High_Z Low