9 MPR CARD CIRCUIT OPERATION
9.1. MPR CARD
9.1.1. Outline
1) Function
· System Control
· Circuit Switching (includes gain adjustment function)
· Conference Call (3 people x 8 ~ 8 people x 3)
· MOH
· PAGING
· Clock
2) Configuration
· Power Supply: DC/DC Converter
· CPU: HITACHI SH7709S (133MHz)
· ASIC: Our own products
· ROM: 4Mbit x 1 (for boot programs)
· SDRAM: 64Mbit x 2 (for work area)
· SRAM: 4Mbit x 2 (for user data backup)
· SD card I/F (for operating programs) x 1
· USB I/F (for PC programming) x 1
· MOH: External sound input x 2
· PAGING: External output x 2
· Expanded memory connector x 1
· Modem card connector x 1
3) Operation Rating
· Power Input : +15V
· Power Output : +15V (for MOH)
+3.3V (for I/O)
+3.3VBB (back board signal line pull-up)
+3.3VB (for SRAM backup)
+1.8V (for CPU core)
+1.9VB (for clocking backup)
±9.4V (for RS-232C driver/receiver)
+5VRMT unused (for remote card)
+5V (for RS-232C driver/receiver)
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KX-TDA100CE
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