Empr Card Circuit Operation; Empr Card - Panasonic KX-TDA600BX Service Manual

8 EMPR CARD CIRCUIT OPERATION

8.1.

EMPR CARD

8.1.1. 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 SH7750R (200MHz)
• • • • ASIC: Our own products
• • • • ROM: 8Mbit x 1 (for boot programs)
• • • • SDRAM: 256Mbit x 2 (for work area)
• • • • SRAM: 16Mbit 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
• • • • Internal Voltage
+15V (for MOH)
+3.3V (for I/O)
+3.3VBB (back board signal line pull-up)
+3.3VB (for SRAM, RTC backup)
+1.5V (for CPU core)
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KX-TDA600BX