MSM6791 Datasheet | OKI Electric

¡ 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 (8k Hz sampling fixation) 7.5kbps, 9.4kbps, 12kbps in MSM6788 connection (6k Hz sampling fixation) 16kbps~32kbps in MSM6688 connection (4k Hz~8k Hz 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 BLOCK DIAGRAM TEST TEST GND GND V 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 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 ¡ Semiconductor PIN CONFIGURATION (TOP VIEW) A11 A10 VDD A6 A5 A4 36 A3 35 A9 A8 A7 A2 34 RWCK DOUT WE SAD SAS GND TEST TAS CS1 CS2 NC 1 2 3 4 5 6 7 8 9 10 11 33 32 31 30 29 28 27 26 25 24...