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参数资料
| 型号： | USB2228-NU-03 |
| 厂商： | STANDARD MICROSYSTEMS CORP |
| 元件分类： | 存储控制器/管理单元 |
| 中文描述： | FLASH MEMORY DRIVE CONTROLLER, PQFP128 |
| 封装： | 14 X 14 MM, 1 MM THICKNESS, LEAD FREE, TQFP-128 |
| 文件页数： | 10/25页 |
| 文件大小： | 961K |
| 代理商： | USB2228-NU-03 |
4th Generation USB2.0 Flash Media Controller with Integrated Card Power FETs
Datasheet
Revision 1.76 (09-24-04)
13
SMSC USB2228
DATASHEET
Memory Address
Bus
MA[1:0]/CLK_S
EL[1:0]
I/O8PD
MA[1:0], These signals address memory locations
within the external memory.
SEL[1:0]. During nRESET assertion, these pins will
select the operating frequency of the external clock, and
the corresponding weak pull-down resistors are
enabled. When nRESET is negated, the value on these
pins will be internal latched and these pins will revert to
MA[1:0] functionality, the internal pull-downs will be
disabled.
SEL[1:0] = ‘00’. 24MHz
SEL[1:0] = ‘01’. RESERVED
SEL[1:0] = ‘10’. RESERVED
SEL[1:0] = ‘11’. 48MHz
Note:
If the latched value is ‘1’, then the
corresponding MA pin is tri-stated when the
following conditions are true:
1. IDLE bit (PCON.0) is 1.
2. INT2 is negated
3. SLEEP bit of CLOCK_SEL is 1.
If the latched value is ‘0’, then the corresponding MA pin
will function identically to the MA[15:3] pins at all times
(other than during nRESET assertion).
Memory Write
Strobe
nMWR
O8
Program Memory Write; active low
Memory Read
Strobe
nMRD
O8
Program Memory Read; active low
Memory Chip
Enable
nMCE
O8
Program Memory Chip Enable; active low.
This signal is asserted, when any of the following
conditions are no longer met:
1. IDLE bit (PCON.0) is 1.
2. INT2 is negated
3. SLEEP bit of CLOCK_SEL is 1.
Note:
This signal is held to a logic ‘high’ while
nRESET is asserted.
MISC
General Purpose
I/O
GPIO1
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
GPIO2
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
GPIO3
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
GPIO4
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
GPIO5
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
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PDF描述 |
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| USB2228-NE-03 | |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| USB2228-NU-05 | 功能描述:USB 接口集成电路 USB 2.0 Flash Media Card RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
| USB2228-NU-05-E2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| USB2228-NU-09 | 功能描述:USB 接口集成电路 USB 2.0 Flash Media Card RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
| USB2228-NU-10 | 功能描述:USB 接口集成电路 USB 2.0 Media Card Cntrllr RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
| USB2228-NU-11 | 功能描述:USB 接口集成电路 USB 2.0 Flash Media Card Controller RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
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