Fujitsu MHD2032AT, MHC2032AT, MHD2021AT, MHC2040AT manual Encsel, Diow, Stop, Dior, Hdmardy

Interface

[signal]	[I/O]		[Description]
ENCSEL	I	This signal is used to set master/slave using the CSEL signal (pin 28).
		Pins A and C Open: Sets master/slave by the MSTR signal
			without using the CSEL signal.
			Short: Sets master/slave using the CSEL signal.
			The MSTR signal is ignored.
MSTR	I	MSTR, I, Master/slave setting
		1: Master	0: Slave
RESET-	I	Reset signal from the host. This signal is low active and is
		asserted for a minimum of 25 μs during power on.
DATA 0-15	I/O	Sixteen-bit bi-directional data bus between the host and the
		device. These signals are used for data transfer
DIOW-	I	Signal asserted by the host to write to the device register or data
		port.
STOP	I	DIOW- must be negated by the host before starting the Ultra
		DMA transfer. The STOP signal must be negated by the host
		before data is transferred during the Ultra DMA transfer. During
		data transfer in Ultra DMA mode, the assertion of the STOP
		signal asserted by the host later indicates that the transfer has been
		suspended.
DIOR-	I	Read strobe signal from the host to read the device register or data
		port
HDMARDY-	I	Flow control signal for Ultra DMA data In transfer (READ DMA
		command). This signal is asserted by the host to inform the
		device that the host is ready to receive the Ultra DMA data In
		transfer. The host can negate the HDMARDY- signal to suspend
		the Ultra DMA data In transfer.
HSTROBE	I	Data Out Strobe signal from the host during Ultra DMA data Out
		transfer (WRITE DMA command). Both the rising and falling
		edges of the HSTROBE signal latch data from Data 15-0 into the
		device. The host can suspend the inversion of the HSTROBE
		signal to suspend the Ultra DMA data Out transfer.
INTRQ	O	Interrupt signal to the host.
		This signal is negated in the following cases:
		− assertion of RESET- signal

− Reset by SRST of the Device Control register − Write to the command register by the host

− Read of the status register by the host − Completion of sector data transfer

(without reading the Status register)

The signal output line has a high impedance when no devices are selected or interruption is disabled.

5-4 C141-E050-02EN