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參數(shù)資料
| 型號(hào)： | USB2224 |
| 廠商： | SMSC Corporation |
| 英文描述： | BUS POWERED USB2.0 FLASH MEDIA CONTROLLER |
| 中文描述： | 總線供電個(gè)USB2.0閃存介質(zhì)控制器 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大小： | 286K |
| 代理商： | USB2224 |
Bus Powered USB2.0 Flash Media Controller
Datasheet
SMSC USB2224
Page 13
Revision 1.3 (09-21-04)
DATASHEET
NAME
SYMBOL
BUFFER
TYPE
O8
DESCRIPTION
Memory
Address Bus
Memory Read
Strobe
Memory Read
Strobe
Memory Chip
Enable
MA[15:0]
These signals address memory locations within the
external memory.
Program Memory Write; active low
nMWR
O8
nMRD
O8
Program Memory Read; active low
nMCE
O8
Program Memory Chip Enable; active low. This signal is
asserted, when the device is not is SUSPEND mode.
Note:
This signal is held in a logic ‘high’ state (inactive)
during nRESET assertion.
MISC
This pin has an internal weak pullup resistor that can be
enabled or disabled by the state of nRESET.
The pullup is enabled when nRESET is active.
The pullup is disabled, when the nRESET is inactive
(some clock cycles later, after the rising edge of
nRESET).
The state of this pin is latched internally on the rising
edge of nRESET to determine if internal or external
program memory is used.
The state latched is stored in ROMEN bit of GPIO_IN1
register. After the rising edge of nRESET, this pin may be
used as GPIO6 or RXD.
When pulled low via an external weak pulldown resistor,
an external program memory should be connected to the
memory data bus. The USB2224 uses this external bus
for program execution.
When this pin is left unconnected or pulled high by a
weak pullup resistor, the USB2224 uses the internal ROM
for program execution.
This pin’s function while operating from internal ROM is
shown in Table 6.3 - GPIO Usage.
This pin may be used either as input, edge sensitive
interrupt input, or output.
This pin’s function while operating from internal ROM is
shown in Table 6.3 - GPIO Usage.
This pin may be used either as input, edge sensitive
interrupt input, or output.
This pin’s function while operating from internal ROM is
shown in Table 6.3 - GPIO Usage.
This pin may be used either as input, edge sensitive
interrupt input, or output.
This pin’s function while operating from internal ROM is
shown in Table 6.3 - GPIO Usage.
GPIO6,
ROMEN and
RXD
GPIO6
/ROMEN
I/O8PU
General
Purpose I/O
GPIO1
I/O8
General
Purpose I/O
GPIO2
I/O8
General
Purpose I/O
GPIO3
I/O8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| USB2224-NE-02 | BUS POWERED USB2.0 FLASH MEDIA CONTROLLER |
| USB2224-NU-02 | BUS POWERED USB2.0 FLASH MEDIA CONTROLLER |
| USB2227 | 4TH GENERATION USB2.0 FLASH MEDIA CONTROLLER WITH INTEGRATED CARD POWER FETS |
| USB2227-NE-XX | 4TH GENERATION USB2.0 FLASH MEDIA CONTROLLER WITH INTEGRATED CARD POWER FETS |
| USB2227-NU-XX | 4TH GENERATION USB2.0 FLASH MEDIA CONTROLLER WITH INTEGRATED CARD POWER FETS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| USB2224_06 | 制造商:SMSC 制造商全稱:SMSC 功能描述:Bus Powered USB2.0 Flash Media Controller |
| USB2224-NE-02 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| USB2224-NE-04 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| USB2224-NE-05 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| USB2224-NU-02 | 制造商:SMSC 制造商全稱:SMSC 功能描述:BUS POWERED USB2.0 FLASH MEDIA CONTROLLER |
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