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): 32/164頁
文件大?。?/td> 621K
代理商: 37C669
127
CR08
This register can only be accessed in the
Configuration Mode and after the CSR has been
initialized to 08H.
The default value of this
register after power up is 00H. This is the lower
4 bits (ADRA7:4) for the ADRx address decode.
The non-programmable
address
bits
3:0
default to 0000b.
CR09
This register can only be accessed in the
Configuration Mode and after the CSR has been
initialized to 09H.
The default value of this
register after power up is 00H. This is the upper
3 bits (ADRA10:8) (D2 - MSB, D0 - LSB) for the
ADRx address decode. ADRx Config (bits 7:6)
define the configuration of the ADRx decoder as
follows:
D7
D6
ADRx Configuration
0
ADRx disabled
0
1
1 Byte decode
A[3:0]=0000b
1
0
8 Byte block decode
A[3:0]=0XXXb
1
16 byte block decode
A[3:0]=XXXXb
Upper Address Decode requirements : nCS='0' is required to qualify the ADRx output.
CR0A
This register can only be accessed in the
Configuration Mode and after the CSR has been
initialized to 0AH.
The default value of this
register after power up is 00H. This byte defines
the FIFO threshold for the ECP mode parallel
port.
Table 54 - CR0A
D7
D6
D5
D4
D3
D2
D1
D0
RESERVED - READ ONLY 0 HEX
ECP F I F O T H R E S H O L D
THR3
THR2
THR1
THR0
CR0B
This register can only be ac1cessed in the
Configuration Mode and after the CSR has
been initialized
to
0BH. The default value of
this register after power up is 00H. This register
indicates the data rate table used for each drive.
Refer to CR1F for Drive Type register.
Table 55 - CR0B
FDD3
FDD2
FDD1
FDD0
D7
D6
D5
D4
D3
D2
D1
D0
DRT1
DRT0
DRT1
DRT0
DRT1
DRT0
DRT1
DRT0
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