PCB Layout GuidePCB Layout GuideCreated by : Allen Cai / Liang Liwan Date: 3/02/2005目录 l Spreadtrum solution的特点 l PCB STACK l Placement l Layout2005年7月29日Proprietary and Confidential Information2Spreadtrum solutionTest/Debug Interface ARM7TDMI Ext. Mem Interface MTDO MTDI MTCK MTMS MTRST_N EMA [24:0] EMD [15:0] EMBL_N EMBH_N EMOE_N EMWE_N EMCS_N [7:0] RST_N PBINT XTLEN Prog RAM JTAG X/Y RAM P-Port X-Port and Y-Port TeakLite Z-Port X ROM Clock & PLL System Control Shared RAM RF Control SIMCLK SIMDA SIMPE SIMRST SIM card U0TXD U0RXD U0DTRN U0RTSN U0DSRN U0CTSN U1TXD U1RXD Download & Tuning U2TXD U2RXD SDA SCL KEYOUT [5:0] KEYIN [4:0] PWMA PWMB ADCI [4:0] DAC 32k crystal CLK32I CLK32O SIM Interface ROM Interrupt Control PA Control Encryption Enagine Baseband Codec MCLKI AFCOUT RFSDA RFSCK RFSEN……
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