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參數(shù)資料
| 型號： | USB2231 |
| 廠商： | SMSC Corporation |
| 英文描述： | 5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
| 中文描述： | 第五代高速USB閃存介質(zhì)和CIR控制器，它集成卡功率場效應管 |
| 文件頁數(shù)： | 18/26頁 |
| 文件大?。?/td> | 937K |
| 代理商： | USB2231 |
5th Generation Hi-Speed USB Flash Media and CIR Controller with Integrated Card Power FETs
Datasheet
Revision 1.3 (07-12-05)
18
SMSC USB2231/USB2232
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.
Table 6.1 USB2231/USB2232 Pin Descriptions
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| USB2231-NE-03 | 5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
| USB2231-NU-03 | 5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
| USB2232 | 5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
| USB2232-NE-03 | 5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
| USB2232-NU-03 | 5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| USB2231-NE-03 | 制造商:SMSC 制造商全稱:SMSC 功能描述:5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
| USB2231-NU-03 | 制造商:SMSC 制造商全稱:SMSC 功能描述:5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
| USB2232 | 制造商:SMSC 制造商全稱:SMSC 功能描述:5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
| USB2232-NE-03 | 制造商:SMSC 制造商全稱:SMSC 功能描述:5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
| USB2232-NU-03 | 制造商:SMSC 制造商全稱:SMSC 功能描述:5th GENERATION HI-SPEED USB FLASH MEDIA AND CIR CONTROLLER WITH INTEGRATED CARD POWER FETs |
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