Panasonic KX-TDE200GR, Service Manual

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KX-TDE200GR
4.2. IPCMPR Card Circuit Operation
4.2.1. IPCMPR Card
4.2.1.1. 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 SH7788 (400MHz)
• ASIC: Our own products
• ROM: 8Mbit x 1 (for boot programs)
• SDRAM: 512Mbit x 2 (for work area)
• SRAM: 16Mbit x 1 (for user data backup)
• SD card I/F (for operating programs) x 1
• LAN I/F (for PC programming and the VoIP) x 2
• 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_CON
• Power Output: +15V (for MOH)
+3.3V (for I/O)
+3.3VD_BB (back board signal line pull-up)
+3.3VD_B (for SRAM backup)
+1.25VD (for CPU core)
+2.5VD (for DDR-SDRAM, CPU, LAN SW IC amd FPGA)
+1.8VD (for LAN SW IC)
+1.2VD (for FPGA)