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SP37E760 参数 Datasheet PDF下载

SP37E760图片预览
型号: SP37E760
PDF下载: 下载PDF文件 查看货源
内容描述: 3.3 V的I / O控制器的嵌入式应用 [3.3 V I/O CONTROLLER FOR EMBEDDED APPLICATIONS]
分类和应用: 控制器
文件页数/大小: 78 页 / 507 K
品牌: SMSC [ SMSC CORPORATION ]
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7.3.5 CR04  
CR04 can only be accessed in the configuration state and after the CSR has been initialized to 04H. The default  
value after power up is 00H (Table 29).  
Table 29 - CR04: Parallel and Serial Extended Setup Register  
BIT  
NO.  
BIT NAME  
DESCRIPTION  
1,0  
Parallel  
Bit 1  
0
Bit 0  
0
If CR1 bit 3 is a low level then:  
Port  
Extended  
Modes  
Standard and Bi-directional Modes (SPP) (default)  
0
1
1
1
0
1
EPP Mode and SPP  
ECP Mode2  
ECP Mode & EPP Mode1,2  
2,3  
4
Reserved  
MIDI 13  
. Reserved – Read as 0  
Serial Clock Select Port 1: A low level on this bit, disables MIDI support, clock =  
divide by 13 (default). A high level on this bit enables MIDI support, clock = divide  
by 12.  
Serial Clock Select Port 2: A low level on this bit, disables MIDI support, clock =  
divide by 13 (default). A high level on this bit enables MIDI support, clock = divide  
by 12.  
5
MIDI 23  
6
7
EPP Type  
Reserved  
0 = EPP 1.9 (default)  
1 = EPP 1.7  
Reserved - Read as 0.  
Note1: In this mode, EPP can be selected through the ecr register of ECP as mode 100.  
Note2: In these modes, 2 drives can be supported directly, 3 or 4 drives must use external 4 drive support. SPP can be  
selected through the ecr register of ECP as mode 000.  
Note3: MIDI Support: The Musical Instrumental Digital Interface (MIDI) operates at  
31.25Kbaud (+/-1%) which can  
be derived from 125KHz. (24 MHz/12=2 MHz, 2 MHz/16=125 KHz).  
7.3.6  
CR05  
(Reserved). The default value after power up is 00H .  
7.3.7 CR06  
(Reserved). The default value of this register after  
power up is FFH.  
SMSC DS – SP37E760  
Page 50  
Rev. 04/13/2001  
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