參數(shù)資料
型號(hào): IT8673F
廠商: Electronic Theatre Controls, Inc.
英文描述: GT 35C 35#12 SKT PLUG
中文描述: 先進(jìn)的輸入/輸出(高級(jí)I / O)的初步規(guī)范V0.5
文件頁數(shù): 59/128頁
文件大?。?/td> 780K
代理商: IT8673F
IT8673F
9
49
Table 11-3. Digital Output Register (DOR)
Bit
Symbol
Name
Description
7-6
-
-
Reserved
5
MOTB EN
Drive B Motor
Enable
0: Disable Drive B motor.
1: Enable Drive B motor.
4
MOTA EN
Drive A Motor
Enable
0: Disable Drive A motor.
1: Enable Drive A motor.
3
DMAEN
Disk Interrupt
and DMA
Enable
0: Disable disk interrupt and DMA (DRQx, DACKx#, TC and INTx).
1: Enable disk interrupt and DMA.
2
RESET#
FDC Function
Reset
0: Reset FDC function.
1: Clear reset of FDC function.
This reset does not affect the DSR, DCR or DOR.
1
-
-
Reserved
0
DVSEL
Drive Selection
0: Selects Drive A.
1: Selects Drive B.
11.4.8.2 Tape Drive Register (TDR, FDC Base Address + 03h)
This is a
read/write
register and is included for 82077 software compatibility. The contents of this register
are not used internal to the device.
Table 11-4. Tape Drive Register (TDR)
Bit
Symbol
Name
Description
7-2
NU
Not Used
-
1-0
TP_SEL[1:0] Tape Drive
Selection
TP_SEL[1:0] : Drive selected.
00: None
01: 1
10: 2
11: 3
11.4.8.3 Main Status Register (MSR, FDC Base Address + 04h)
This is a
read only
register. It indicates the general status of the FDC, and is able to receive data from the
host. The MSR should be read before each byte is sent to or received from the Data register, except when
in DMA mode.
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