Panasonic KX-FP342CX Service Manual page 153

Note*:
This memory is incorporated into the ASIC (IC501) and used for the image processing.
Fig. A shows the memory map of the Image Data RAM.
7.3.4. FLASH MEMORY (IC523)
The 512KB ROM (FLASH MEMORY) carries a common area of 32KB and bank areas which each
have 8KB (BK4~BK63). The addresses from 0000H to 7FFFH are for the common area and from
8000H to 9FFFH are for the bank areas.
7.3.5. DYNAMIC RAM (IC503)
The DRAM serves as CPU and receives memory.
The address is F200H~F3FFH (DRAM access window 1) and F600H~F7FFH (DRAM access
window 2).
Descriptions of Pin Distribution (IC501)
NO. SIGNAL
1 VSSA
2 VDDA 3.3
3 AIN1
4 AIN2
5 AIN3
6 AMON
7 VSS
8 X32OUT
9 X32IN
10 VDD (3.3V / B)
11 XBACEN
12 XRAMCS
13 VDD (3.3V / B)
14 VDD (2.5V/B)
15 FTG
16 F1
17 F2/OP
18 FR/OP
I/O POWER
SUPPLIED
VOLTAGE
GND
3.3V
A 3.3V
A 3.3V
A 3.3V
A 3.3V
GND
O 3.3V/BATT
I 3.3V/BATT
-----
I 3.3V/BATT
O 3.3V/BATT
-----
-----
O 3.3V
O 3.3V
O 3.3V
O 3.3V
153
DESCRIPTION
POWER SOURCE (ANALOG GND)
POWER SOURCE (ANALOG +3.3V)
CCD IMAGE SIGNAL INPUT
THERMISTOR TEMPERATURE WATCH
INPUT
-----------
ANALOG SIGNAL MONITOR TERMINAL
POWER SOURCE (GND)
RTC (32.768KHz) CONNECTION
RTC (32.768KHz) CONNECTION
POWER SOURCE (+3.3V/LITHIUM
BATTERY)
BACKUP ENABLE
NOT USED
POWER SOURCE(+3.3V / LITHIUM
BATTERY)
POWER SOURCE (+2.5V / LITHIUM
BATTERY)
SH SIGNAL OUTPUT FOR CIS (SI)
01 SIGNAL OUTPUT FOR CIS (CLK)
OUTPUT PORT (HSTXMUTE)
OUTPUT PORT (MDMRST)