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參數資料
型號: W99681CF
廠商: WINBOND ELECTRONICS CORP
英文描述: JPEG USB Dual Mode Camera Chip(運用JPEG壓縮技術、通用串行總線結構技術、雙制式的照相電路數字處理芯片的攝像照相機接口控制器)
中文描述: JPEG格式相機的USB雙模芯片(運用的JPEG壓縮技術,通用串行總線結構技術,雙制式的照相電路數字處理芯片的攝像照相機接口控制器)
文件頁數: 17/78頁
文件大小: 816K
代理商: W99681CF
W99681CF
Publication Release Date: March 2000
- 17 - Revision A1
4.3 Power-on Reset Initialization
During power-on reset, states of the memory data lines MD[7:0] are latched into the W99681CF
s
internal configuration registers as device configuration information. Since each pin of MD[7:0] is
internally pulled up on its I/O buffer, no external pull-up resistor is required. For pull-down, a 4.7K ohm
resistor is recommended. Table 4.2 describes the power-on reset configuration definitions.
Table 4.2 Power-on Reset Configuration Definitions
MD Bit
Value
Definition
Conf Reg
MD7
0
1
Normal operation
Force suspend mode if suspend mode is enabled
CR00_15
MD6
0
1
Suspend mode is disabled
Suspend mode is enabled
CR00_14
MD5
0
1
sochronous handshake phase is enabled
sochronous handshake phase is disabled
CR00_13
MD4
0
1
nternal RCV comes from SIE
nternal RCV comes from USB Transceiver
CR00_12
MD3
0
1
PLL Disable
PLL Enable
CR00_11
MD2
0
1
Low Power, Bus-powered Devices
High Power, Bus-powered Devices
CR00_10
MD1
0
1
EDO DRAM
SDRAM
CR00_9
MD0
0
1
256Kx DRAM
1Mx DRAM
CR00_8
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