Panasonic KX-TDA100AL Service Manual page 31

LED light (BATALM): Turns on to indicate the dropping of the lithium battery voltage (less than
2.8V).
LED light (SD ACCES): Turns on when the SD card is accessing.
SD card slot: Mounts the system program SD card.
Reset Switch: Press at the system reset.
System Initialize Switch:
On default startup, set the switch to the "SYSTEM INITIALIZE" position for the power ON.
Return the switch to the "NORMAL" position when the main power switch starts to flash. On
normal startup, turn the power ON with the "NORMAL" position.
USB connector: B type connector. Used for the PC programming.
PAGING 1, 2: External PAGING output. Connect to the device with the built-in amplifier.
MOH 1, 2: External music on-hold input.
9.1.3. Block Diagram
9.1.4. Circuit Description
9.1.4.1. Outline of Block Description
- CPU block
This block operates the main unit control. Besides this operates
various controls, select signal generation, DMA control and serial
port control. This contains the built-in clock function.
- ASIC block
This provides the communication function between each option
card, call control (TSW function), conference call, tone generation
and gain control function.
- Memory block
This is a work area and the main unit control program storage or
the system boot program storage or the user configuration data
storage area.
- USB block
This provides the USB I/F function. Connects to the PC to be used
for the PC programming or the system data load/store.
- SD card block
This provides the SD card I/F function and loads the main unit
program and the system data from the SD card storing the main
unit control program.
- MOH/PAGING block
This provides the external music on-hold input x 2, the external
paging output x 2 port. And also this provides the external music
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