SC14408 Complete Baseband Processor for DECT Handsets General Description ■ Embedded 16 bit CompactRISCTM Micro Controller. (CR16B) with programmable clock speeds. ■ 384 kbyte Flash. ■ ACCESSBUSTM or MICROWIRETM interfaces ■ 6 kilobyte on-chip Data Memory. ■ One full duplex ADPCM transcoder. ■ On-chip 14-bit linear CODEC. ■ 14 upto 44 dB gain differential microphone input buffer. ■ 80 Ω loudspeaker driver. ■ Software controlled gain on audio input and output. ■ Peak hold ADC for RSSI measurement. ■ Five general purpose inputs can be multiplexed on an 8 bit ADC with selectable ranges. ■ On-chip dedicated TDMA instruction co-processor which supports DECT and ISM-bands providing 1.152 Mb/s, 1.024 Mb/s, 0.576 Mb/s, 0.512 Mb/s, 0.288 Mb/s and 0.256 Mb/s. ■ Seven programmable control signals for radio front end. ■ Full and double slot, protected and unprotected Bfields. ■ Duplex quality handsfree operation. ■ Tone generator. Tones consisting of 3 frequencies can be programmed ■ Linear PCM interface for external codec. ■ ISM band support with 8/9 x 10.368 Mc xtal = 9.216 Mc ■ On chip LCD controller (6X30 segments) The SC14408 is a CMOS chip optimized to handle all the audio, signal and data processing needed within a DECT (1.9GHz) or in the 2.4GHz ISM digital band handset. An ADPCM transcoder, a very low power CODEC and Analog Frontend is integrated. Direct connections towards microphone and a (dynamical) loudspeaker are provided. Duplex quality handsfree operation is integrated. The SC14408 is designed to fit to any radio design. A dedicated TDMA controller handles all physical layer slot formats and radio control. National Semiconductors standard CompactRISCTM CR16B 16 bit microcontroller takes care of all the higher protocol stack. Features ■ Integrated DECT Baseband transceiver optimized for GAP handsets according to ETS 300 175-2, 175-3 & 175-8. ■ Two on board low drop voltage regulators with 2.5V and 3.0- 3.8V (with external resistors the voltage can be determined) output. ■ 2V upto 3.6V battery input with onboard step up converter. ■ Advanced battery management unit ■ Very low power in active and paging mode. Note: ACCESSBUSTM, MICROWIRETM and CompactRISCTM are trademarks of National Semiconductor Corporation. ________________________________________________________________________________________________ System Diagram © 2001 National Semiconductor Corporation 1 www.national.com SC14408 May 2001 V 1.0 SDA2 SCL2 RSTN VSS VDD VREF+ MIC+ AGND MICVREFVREF_HS LRSLRS+ LRS_HS AVD2 AVS2 VBUF VBAT1 VBAT2 / DC_DIS LDO2_CTRL 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 PD7/P3[7] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SC14406BxxVV SC14406BxxVD SC14408B80VV SC14408B80VD 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 LDO1_CTRL LDO1_sense ADC3 (battery current) AVS_sense DC_I DC_Sense DC_stab VBAT3 P2[7] / DC_CTRL stop_charge/P2[6] P2[5] / SDA1 P2[4] / SCL1 P2[3] / PCM_D0 / ADC1 P2[2] / ADC0 P2[1] / PCM_DI / PWM1 VDD VSS P2[0] / PWM0 P1[7] / CHARGE P1[6] / PON 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 PD1/P3[1] PD5/P3[5] PD4/P3[4] PD3/P3[3] PD2/P3[2] VDD VSS RFCLK VDDRF VSSRF Xtal1 CAP AVS AVD RSSI RDI CMPREF TDO LE SO SK PCM_CLK / DAC2 / ADC2 PCM_FSC / PD6 / UTX / P0[0] URX / P0[1] P0[2] P0[3] P0[4] P0[5] P0[6] P0[7] VDD VSS INT0n / P1[0] INT1n / P1[1] INT2n / P1[2] INT3n / P1[3] INT4n / P1[4] EEROM/INT5n / P1[5] SC14408 1.0 Pin type definitions , 2 14-03-2001 www.national.com SC14408 P1[7..0] PWM P0[7..0] CR16B UART ACCESS BUS1 ACCESS BUS2 XTAL TRIMMING CompactRISC 16 bit micro controller DMA sclk 16 bits System Bus Interface 8 bits 4 KBYTE ICU 384kbyte FLASH CLOCK DIVIDER BOOT ROM TIMERS 8 BIT ADC DATA RAM LCD DRIVER temperature sensor P2[7..0] DSP 1 KBYTE MICRO CODE RAM RAM 10 100X 2 KBYTE SHARED DC/DC convertor RAM Battery&charge control 2X Voltage regulator DEDICATED INSTRUCTION PROCESSOR CODEC HANDS FREE DSP RF ENCRYP ADPCM TION BMC CONTROL PINS CLOCK RECOVERY 3 BITS FIR FILTER AFE MICRO WIRE 8 BIT DAC GAUSSIAN SHAPER RF INTERFACE 80Ω HEADSET FIGURE 1. SC14408 Block diagram 3 www.national.com SC14408 2.0 Package information FIGURE 2. 80 pins Quad Flat Pack. NS Package: vje80a , 4 www.national.com National Semiconductor B.V reserves the right to make changes without notice to any products herein to improve reliability, function or design. National does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the right of others. ________________________________________________________________________________________________ LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSIL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: [email protected] National Semiconductor Europe Fax: (+49) 0-180-530 85 86 Email: [email protected] Deutsch Tel: (+49) 0-180-530 85 85 English Tel: (+49) 0-180-532 78 32 National Semiconductor Asia Pacific Customer Response Group Tel: 65-254-4466 Fax: 65-250-4466 Email: [email protected] National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 National does not assume any responsibility for use of any circuitry described, no patent licences are implied and National reserves the right at any time without notice to change said circuitry and specifications 5 www.national.com SC14408 3.0 Product status definitions