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參數(shù)資料
| 型號： | RB5C396 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 總線控制器 |
| 英文描述： | PC Card Controller compliant with PCMCIA 2.1/JEIDA 4.2 |
| 中文描述： | PCMCIA BUS CONTROLLER, PBGA256 |
| 封裝： | 23 X 23 MM, PLASTIC, BGA-256 |
| 文件頁數(shù)： | 30/93頁 |
| 文件大小： | 449K |
| 代理商： | RB5C396 |
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1) IRQ9, IRQ10 and IRQ11 (or IRQ15) are redefined as DMA signals for ISA Bus. Therefore these signals can not
be used as interrupt lines.
2) Bit5 of General Control Register must be set to “1” to select I/O card.
3) If WP/IOIS16# is used as DREQ, bit4 of Interface Status Register indicates DREQ from PC Card.
4) If BVD2/SPKR# is used as DREQ, SPKROUT# and LED output can not be used.
5) If INPACK# is used as DREQ, bit2 of Mode Control Register 2 must be kept “0”.
6) TC input can be assigned to one of two IRQ signals (IRQ11 or IRQ15) by setting bit4 of Mode Control Register .
RF5C296/RF5C396L/RB5C396/RF5C396
26
The TC# (terminal count) pin signal input to the PC card becomes active low for output from the OE# pin at a
cycle for reading from the PC card (a cycle for writing to the memory) and from the E# pin at a cycle for writing to
the PC card (a cycle for reading from the memory). Further, the output REG# pin signal is always held at high level
during DMA transfer. Thus, it is easy to distinguish between DMA transfer and ordinary bus cycles. Namely, the
REG# pin signal functions as DMA transfer acknowledgment for the PC card.
Notice on the DMA mode
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