MSM6791

¡ Semiconductor MSM6791 MSM6791 DRAM Interface IC ¡ Semiconductor GENERAL DESCRIPTION The MSM6791 can be used as a memory for voice data by connecting OKI solid-state recording and playback ICs (MSM6688 and MSM6788). FEATURES DRAM (¥ 1-bit configuration) 1M-bit DRAM (MSM511000A, MSM511001A) : 8 pcs. can be connected. 4M-bit DRAM (MSM514100A, MSM514101A) : 8 pcs. can be connected. 16M-bit DRAM (MSM5116100A) : 2 pcs. can be connected. Note: MSM511002A/MSM514102A that corresponds to a static column mode cannot be used. 5V single rail 8MHz 10kbps, 12.5kbps, 16kbps in MSM6788 connection (8kHz sampling fixation) 7.5kbps, 9.4kbps, 12kbps in MSM6788 connection (6kHz sampling fixation) 16kbps~32kbps in MSM6688 connection (4kHz~8kHz sampling) Power supply voltage : Built-in refresh circuit (RAS only refresh) Original oscillation frequency: Bit rates: Package: 44-pin plastic QFP (QFP44-P-910-2K) (Product name : MSM6791GS-2K) ¡ Semiconductor MSM6791 BLOCK DIAGRAM TEST TEST GND GND V DD VDD SAD Sin Pout 13 13 Column or Row Address Multiplexer Row.A11 10 TAS Address Multiplexer 12 A0 A1 A2 A3 A4 A5 A6 A7 R Column Address Counter Rerfresh Counter 12 A8 A9 A10 A11 CK SAS Column and Row Address Counter LD CK 3 XT XT OSC WE RWCK CS1 CS2 CS3 CS4 Timing Controller DRAM Controller CAS Controller CAS1 CAS2 CAS3 CAS4 CAS5 CAS6 CAS7 M1 M2 CAS8 XWE RAS DOUT XDIN MSM6791 ¡ Semiconductor PIN CONFIGURATION (TOP VIEW) A11 A10 VDD A6 A5 A4 36 A3 35 A9 A8 A7 A2 34 44 43 ...