LG KG270 Service Manual - Page 38

3. TECHNICAL BRIEF 3.13 Memory Interface VBAT (NOT MOUNTED) 2V8_VMEM_S U300 BH28FB1WHFV 1 5 2 3 STBY NC GND BGND 6 4 VIN VOUT C300 NA C301 NA 2V8_VMEM DATA00 DATA01 DATA02 DATA03 DATA04 DATA05 DATA06 DATA07 DATA08 DATA09 DATA10 DATA11 DATA12 DATA13 DATA14 DATA15 C315 0.1u 2V8_VMEM_S 2V8_VIO R310 0 R311 NA R315 NA C316 0.1u MEMORY U301 G2 E3 DQ0 DQ1 H3 F4 DQ2 DQ3 F5 H6 DQ4 E6 DQ5 G7 H2 DQ6 DQ7 F3 DQ8 DQ9 G3 DQ10 H4 G6 DQ11 F6 DQ12 H7 DQ13 F7 DQ14 DQ15 G4 VCCF G5 VCCS S71GL032A40BAW0F E1 A0 D1 A1 A2 C1 A3 A4 B1 D2 A5 C2 B2 A6 A2 A7 A8 A6 C6 A9 A10 D6 A11 A7 A12 B7 C7 A13 D7 A14 B8 A15 A16 A17 E8 D3 A18 A19 C3 B6 A20 C5 G8 VSS1 E2 VSS2 C8 RFU0 D8 E7 RFU1 F8 H5 RFU2 RFU3 RFU4 F2 _OE _WE A5 _LB _UB A3 B3 _CE1F F1 _CE1S G1 B5 CE2S RY__BY C4 A4 WP_ACC _RSTF B4 TP300 _RY_BY ADD01 ADD02 ADD03 ADD04 ADD05 ADD06 ADD07 ADD08 ADD09 ADD10 ADD11 ADD12 ADD13 ADD14 ADD15 ADD16 ADD17 ADD18 ADD19 ADD20 ADD21 _OE _WR ADD00 BHE_N CS0n CS1n R312 100K R313 100K R314 0 2V8_VMEM 2V8_VMEM Figure 3-13 Memory interface In E-GOLDvoice, the 16bits demultiplex X-bus interface is used for memory device support. NOR Flash memory is supported. (The NAND Flash memory is not supported). The page mode can be supported for flash memories. Up to 8MBytes of external RAM and/or ROM can be connected to the MCU via its external bus interface. Up to 3 external CS signals can be generated to save external glue logic. Access to very slow memories is supported via a special 'Ready' function. The system MCU clock is set to run with 26Mhz. - 39 -