Panasonic BB-HCM547A, Service Manual

Page: 9 / 99

9
BB-HCM547A
[IC 101 peripheral]
• The function of the IC101 is a system LSI for a network camera containing the CPU
• The power supply voltages are +3.3 V (IO) and +1.2 V (inside) and there are two power supply.
• The function of the CPU is hardware control, TCP/IP protocol processing and applications performance such as HTTP and FTP.
• The clock setting is 27 MHz, 48 MHz, 54 MHz and 108 MHz by inside, which multiply 48 MHz oscillation in the X101 by PLL.
• There are two types of external bus: the General-purpose bus and the bus for SDRAM only.
• The General bus is connected to a Flash Memory for program storage.
• The capacity of the Flash Memory (IC102) is 64Mbit (4 M x 16 bit); the program, the setting information for the network camera
and the MAC address are stored.
• Two SDRAMs (IC103/104) of 128 Mbit (8 M x 16 bit) are used, which are connected to CPU with bus width of 32bit, and are
available for CPU processing work, storage of communication data, and storage of audio/image data.
• The RESET IC (IC106) monitors the power supply voltage, detects the rising edge of +3.3 V and generates the Hardware Reset
Signal.
• IC602 is RTC (Real Time Clock), and is used for time setting of image transfer, etc. This is backed up by a lithium battery
(BAT601) even at the time of power OFF. I2C Bus is used as I/F with CPU.
• There is an RTC block inside IC101, and this inside RTC block operates during the existence of electricity by importing the clock
data from IC602 at the time of power ON.
• IC101 is equipped with the GPIO terminal, which is used for input and output signal of motor control and IO terminal control, etc.
• An SD memory card control block is included on IC101, and used by connecting an SD card slot (CN602).
• There is a green LED (LED101) near the SD card slot, and it lights while the SD card is being accessed.
• When the FUNCTION switch(SW102) is pressed, since LED(LED 601) is turned off and the SD card access stop, and it can be
safely pulled out.
[Power LED control]
Red and green LEDs are used in the Power LED (LED901) indicator on the LED board. LEDs are turned on, blinked or turned
off by turning ON/OFF the transistors (Q901 and Q902) that are connected to the LEDs. The transistors are turned ON/OFF
from the output port of the CPU (IC101) on the Main board.
LED_R LED_G Q901 Q902 LED COLOR
H H ON ON Orange
H L ON OFF Red
L H OFF ON Green
L L OFF OFF OFF the light