MSTAR Platform GSM Mobile Receipt Signal Flow-chart

Presentation on theme: "MSTAR Platform GSM Mobile Receipt Signal Flow-chart"— Presentation transcript:

0 MSTAR Platform Trainning
Edit：Gonglong GREAT R&D

1 MSTAR Platform GSM Mobile Receipt Signal Flow-chart
射频部分 26MHz参考时钟 发射功率放大, 天线开关切换收/发 射频低噪声放大 LNA39dB 可选 接收镜像抑制 RF混频 RF Mixer 接收中频滤波IF=100KHZ 带宽：200KHZ 接受中频滤波增益可编程：78dB 2dB step IF混频、I/Q解调－>67.708kHz模拟I/Q信号 接收射频滤波SAW 925~960MHz for GSM 1805~1880MHz for DCS 模拟基带I/Q信号滤波 模拟基带信号A/D及滤波 GMSK解调、维特比信道均衡、解密、去交织、信道解码 语音解码： RPE-LTP 解压缩、数字音频滤波、D/A 模拟音频放大、滤波 RFCTRLDIN RFCTRLEN RFCTRLCLK XEN 基带部分

2 MSTAR平台 GSM双频手机发送信号 处理流程 基带部分 射频部分 模拟信号放大、滤波 A/C模数变换及数字音频滤波
语音压缩编码RPE-LTP:13kbps 信道编码、交织、加密、突发脉冲形成、GMSK调制模拟基带I、Q信号 RFCTRLDIN RFCTRLEN RFCTRLCLK XEN I/Q调制/发射中频滤波 发射偏移上变频锁相环OPLL 880~915MHz for GSM 1710~1785MHz for DCS 发射功率放大, 天线开关切换收/发 射频部分 26MHz参考时钟

3 HW Circuit Theory －RF

4 HW Circuit Theory －RF －Receipt Filter
Receipt filter circuit used for channel primary selection，Select the needful GSM and filtering the non-GSM system stray signal from the numerous frequency component by antenna receipt . The filter use of the SAW. 1930~1990 925~960MHZ 1805~1880 阻抗匹配 1805~1880MHZ Impedance matching Transceiver内部LDO使能信号 925~960

5 HW Circuit Theory－RF －Power supply
Transceiver SI4210 Power is supplied by VRF2 of CPU. I/Q Signal 双向I/Q信号 发射5dB衰减器 LDO1 输出电压2.8V TX850/900 5dB ATT 26M to baseband 26M to Bluetooth 26M Oscillating circuit TX1800/1900 5dB ATT Transceiver Enable Serial Data Port

6 HW Circuit Theory－RF －Transmit Power
DC blocking capacitor TX Power & ramp Control With PA between the impedance matching PA Logical control

7 HW Theory － component location
NOR FLASH BT Filter BT MSR5100 Audio Amplifier AW8731 32.768 Transceiver SI4210 CPU MSW8532 VCTCXO 26MHz Spare battery Cap RF Amplifier RDA6221 Saw filter

8 HW Circuit Theory －Power supply － Power On-Off control
ONOFF is Power ON/Off control for the handset. While Power ON , ONOFF pull down to GND，then the MSW8532 internal each power supply module enabled and output each Valtage ，include baseband VCORE ， VMEM ， VABB ， VIO1 ， VRF2 , Each circuit will working after get valtage . The handset run the program and implement power ON. 开机维持和闹钟唤醒 PMIC_VTCXO LDO使能 选择VM输出2.8V给外部MCP供电 振动马达使能 键盘背光灯使能

9 HW circuit Theory －Power supply － charge control
•VCS port detect the charger insert or pull out，while VCS>3.2V，Produce Interrupt response of charger insert .Resistor divider R302 and R305 used for detect charging valtage and OVP start ，while VADAIN>1V , T101 will cut off。The platform default OVP start valtage is7.6V(1M/150K) ，GATEDRV control 通过NMOS管D304 control PMOS T102 byNMOS D304，and then control PMOS T102, control the current size charging ，the platform default charging current is500mA 。 Current detect Charge control 电池通道ADC 充电器插入中断输出 充电通道ADC Charge detect OVP detect

10 HW Theory － Sim card port
USIM2_DATA, USIM2_CLK , USIM2_RST data is sent by baseband processor ，CLK and RST Signal ，and USIM2_DATA with integrated data channel，VSIM output 1.8V/3.0V supply to SIM card。

11 HW Circuit Theory －Power Supply － Built-in LDO Output
Baseband Chip MSW8532 basis the difference function module，The supply power is different， AVBB（3.2V）supply for analog circuit in IC, VCORE（1.2V）supply for Nuclear circuit inside MSW8532，VTCARD（2.8V) supply for T-card，VCAM_CORD(1.2V) supply for Nuclear circuit inside camera. VCAM_IO(2.8V) supply for IO of camera , VMEM（1.8V) supply for driver circuit of memory port. ，BT_2V8 (2.8V) supply for BT IC为，VIO1(2.8V) supply for digital IO circuit。 3.2V 2.8V 1.2V 2.8V 3.2V 2.8V 1.2V 1.8V 2.8V 2.8V

12 HW Theory －baseband － LCM Port
LCM Port include 9 PCS Image sensor data input LCM_DO_2~LCM_D7, Chip select signal LCM_CS0N , Read enable clock input pin LCM_RDN andWrite enable clock input pin LCM_WRN, Reset input Pin SR_RSTN，Display data/command selection pin LCM_CMD ，LCM 4Power supply anode input for backlight LEDK1~LEDK4 控制TCXO的频率精度AFC Vibrator enable LCM backlight enable Keypad LED enable Touch panel Port 控制PA输出功率和ramp

13 Circuit theory－baseband － Camera port
Camera port include 9 PCS Image sensor data input SD_2~SD_9,Sensor vertical and horizontal reference signal input SR_VSYNC & SR_HSYNC, Pixel clock input SR_PCLK and main clock output SR_MCLK, SR_PWRDN and restore signal SR_RSTN Camera水平和垂直同步信号输入 I2C for camera control camera enable PIN

14 Circuit Theory －baseband － Transfer Audio
MIC biasing Filtering RF TDMA noise Audio DC-blocking capacitor

15 Circuit Theory －Baseband － Receipt Audio Amplify Circuit
Audio Amplifier Audio amplifier internal Cap Filtering RF TDMA noise Sound source input

16 Circuit Theory －Earphone circuit
Earphone right channel Earphone break detect Earphone left channel MIC Biasing Filtering RF TDMA noise Earphone detect MIC Signal Input

17 Thank You ！！！