參數(shù)資料
型號: 37C669
廠商: SMSC Corporation
英文描述: DIODE SCHOTTKY SINGLE 25V 200mW 0.5V-vf 200mA-IFM 30mA-IF 2uA-IR SOD-323 3K/REEL
中文描述: 電腦98/99順從超級I / O軟盤控制器與紅外線支持
文件頁數(shù): 164/164頁
文件大小: 621K
代理商: 37C669
99
Register Definitions
The register definitions are based on the
standard IBM addresses for LPT.
All of the
standard printer ports are supported.
The
additional registers attach to an upper bit
decode of the standard LPT port definition to
avoid conflict with standard ISA devices.
The
port is equivalent to a generic parallel port
interface and may be operated in that mode.
The port registers vary depending on the mode
field in the ecr. The table below lists these
dependencies. Operation of the devices in
modes other that those specified is undefined.
Table 39 - ECP Register Definitions
NAME
ADDRESS (Note 1)
ECP MODES
FUNCTION
data
+000h R/W
000-001
Data Register
ecpAFifo
+000h R/W
011
ECP FIFO (Address)
dsr
+001h R/W
All
Status Register
dcr
+002h R/W
All
Control Register
cFifo
+400h R/W
010
Parallel Port Data FIFO
ecpDFifo
+400h R/W
011
ECP FIFO (DATA)
tFifo
+400h R/W
110
Test FIFO
cnfgA
+400h R
111
Configuration Register A
cnfgB
+401h R/W
111
Configuration Register B
ecr
+402h R/W
All
Extended Control Register
Note 1: These addresses are added to the parallel port base address as selected by configuration
register or jumpers.
Note 2: All addresses are qualified with AEN. Refer to the AEN pin definition.
Table 40 - Mode Descriptions
MODE
DESCRIPTION*
000
SPP mode
001
PS/2 Parallel Port mde
010
Parallel Port Data FIFO mode
011
ECP Parallel Port mode
100
EPP mode (If this option is enabled in the configuration registers)
101
(Reserved)
110
Test mode
111
Configuration mode
*Refer to ECR Register Description
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