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LC895195 Folha de dados(PDF) 7 Page - Sanyo Semicon Device |
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LC895195 Folha de dados(HTML) 7 Page - Sanyo Semicon Device |
7 / 8 page No. 5192-7/8 LC895195 • ZSWAIT (output) When the microcontroller is accessing RAM, the sub-CPU must wait if this pin is low. • D7 to D0 (I/O) Microcontroller data bus. Pull-up resistors are built in. • ZINT (output) Interrupt request signal output to the microcontroller. A pull-up resistor is built in. • ZINT1 (output) Interrupt request signal output from the IDE block to the microcontroller. An external pull-up resistor must be connected to this pin. 3. Buffer RAM Pins • IO0 to IO15 (I/O) Buffer DRAM data bus. A pull-up resistor is built in. • RA0 to RA9 (output) Buffer RAM address lines. • ZRAS0, ZRAS1 (output) Buffer DRAM RAS outputs. Normally, ZRAS0 is used, but if two 1-Mb (64k × 16 bits) chips are used, then both ZRAS0 and ZRAS1 are used, one for each of the chips. • ZCAS0, ZCAS1 (output) Buffer DRAM CAS outputs. Normally, ZCAS0 is used, but if two 1-Mb (64k × 16 bits) chips are used, then both ZCAS0 and ZCAS1 are used, one for each of the chips. When using a two-CAS type DRAM, connect ZCAS0 to UCAS, and ZCAS1 to LCAS. • ZOE (output) Buffer DRAM read output signal. • ZUWE, ZLWE (output) Buffer DRAM write output signals. Connected the corresponding DRAM pins. 4. Subcode Interface Pins • EXCK, WFCK, SBSO, SCOR (input or output) These are the subcode interface connections. The LC895195 acquires subcode data by connection with the CD- DSP and sends that data to the host. 5. CD-DSP Data Pins • BCK, SDATA, LRCK, C2PO (input) The LC895195 reads in the CD-ROM data by connecting to the CD-DSP. The C2PO pin is used for the C2 flags. 6. Other Pins • ZRESET (input) This is the LC895195 reset pin. The LC895195 is reset by a low level on this pin. This pin must be held low for at least 1 µs when power is first applied. • XTALCK, XTAL These pins can drive a 16.9344-MHz or 33.8688-MHz oscillator. Alternatively, an external clock can be input to the XTALCK pin. • MCK (output) This pin outputs either the XTALCK frequency or that frequency divided by 2. This output can be turned off. • MCK2 (output) This pin outputs either the XTALCK frequency or that frequency divided by 512. This output can be turned off. • ZRSTIC (output) This pin can be set to output a low level either by writing to the microcontroller write register R46 bit 7 (ZSYSRTS) or by setting the ZHRST pin (pin 103) low. This pin goes to the high-impedance state when both ZSYSRST and ZHRST are high. Since this pin has an open-drain circuit, an external pull-up resistor must be used. |
Nº de peça semelhante - LC895195 |
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Descrição semelhante - LC895195 |
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