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UPD9930 Datasheet(PDF) 6 Page - NEC |
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UPD9930 Datasheet(HTML) 6 Page - NEC |
6 / 78 page µPD9930 6 TC2 TC1 Test mode specification L L Normal operation L H Speech encoder test mode H L Speech decoder test mode H H Acoustic device test mode 1. PIN FUNCTIONS 1.1 LIST OF PIN FUNCTIONS Table 1-1 List of Pin Functions (1/2) Pin No. Pin Name Input/Output Function 1 MDAT Input Microcontroller interface serial input 2 MCLK Input Microcontroller interface clock input 3 DRSTB Input DAI (Digital Audio Interface) reset input This is reset at low level. Internally pulled high. 4 DI Input DAI serial input Internally pulled high. 5 DO Output DAI serial output Hi-Z in normal operation (TC1 = TC2 = low level) 6 DCLK Output DAI clock output (104 kHz) Hi-Z in normal operation 7 TC1 Input 8 TC2 Input 9 TIMER Output Timer output. Output of rectangular wave synchronized with tone intermittent pattern. 10 RINGER Output Ringer tone output. Output of rectangular wave synchronized with tone fre- quency. 11 DSPSEL Input Selection of DSP interface input/output timing mode. Connect to VDD or GND. (VDD = mode 1, GND = mode 2) 12 REQB Input Input of DSP interface data transmit request signal. Serial data can be input/output at low level. 13 RESETB Input System reset input. This is reset at low level. Initializes all control registers. Reset when turning power on. 14 FSYNC Input Send/receive frame synchronization signal (8 kHz) input 15 DGND — Digital ground. Connect to a digital ground line near µPD9930 pins. 16 AGND1 — Analog ground. Connect to an analog ground line near µPD9930 pins. 17 AGND2 — 18 AGND3 — 19 AGND4 — 20 MICI+ Input Microphone amplifier non-inverted input 21 MICI– Input Microphone amplifier inverted input 22 MICO Output Microphone amplifier output. Connect microphone amplifier gain adjust resistor. Outputs sidetone signal to REC2I- pin. 23 MIXI Input Pre-filter + mixer input 24 XAUXO Output Accessory input amplifier output. Connect accessory input amplifier gain adjust resistor. DAI mode control Selection of test mode specified by GSM11.10 in combination with TC1 and TC2 L: Low level H: High level TC1 and TC2 pins are internally pulled down. |
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Similar Description - UPD9930 |
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