DM560P データシートの表示（PDF） - Davicom Semiconductor, Inc.
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DM560P Datasheet PDF : 43 Pages
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DM560P
V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set
Card Control Registers (continued)
Index
07H
Name
Type
Definition
Logical Device
R 00H (Only one logical device in DM6583A)
Logical Device Control Registers
Index
Name
Type
Definition
30H
Activate
R/W For each logical device, there is one Activate register that controls whether
or not the device is active on the ISA bus. Bit[0], if set, activates the logical
device. Before a logical device is activated, I/O range check must be
disabled.
31H I/O Range Check R/W This register is used to perform a conflict check on the I/O port range
programmed for use by a logical device.
Bit[1] - This bit, when set, enables I/O range check. I/O port range check is
only valid when the logical device is inactive.
Bit[0] - If set, this bit forces logical device to respond to I/O reads within
logical device assigned I/O range with a 55H when I/O range check is in
operation. If clear, the logical device drives AAH.
Logical Device Configuration Registers
I/O Configuration Registers
Index
Name
Type
Definition
60H I/O base address bits[15:8] R/W Read/write value indicating the selected I/O Lower Limit Address Bits
[15:8] for I/O descriptor 0. If a logical device indicates it uses only 10
bits for decoding, then bits [15:10] need not to be supported.
61H I/O base address bits[7:3] R/W Read/write value indicating the selected I/O Lower Input Address Bits
[7:3] for I/O descriptor 0.
Interrupt Configuration Registers
Index Name
Type Definition
70H
IRQ level
R/W Read/write value indicating a selected Interrupt Level Bits[3:0] Select which
ISA interrupt level is used. A value of 1 selects IRQ1, 15 selects IRQ15, etc.
IRQ0 is not a valid interrupt selection.
71H IRQ type bits [7:0] R Read/write value indicating which type of interrupt is used for the IRQ
selected above Bit[1] - Level, 1 = high, 0 = low Bit[0] - Type, 1= level, 0 =
edge for DM6583A, this register is read only with value = 02H.
Preliminary
17
Version: DM560P-DS-P07
August 11, 2000
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