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參數(shù)資料
| 型號： | CY7C68014A-56PVXC |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | EZ-USB FX2LP USB Microcontroller |
| 中文描述： | 8-BIT, EEPROM, 48 MHz, MICROCONTROLLER, PDSO56 |
| 封裝： | LEAD FREE, SSOP-56 |
| 文件頁數(shù)： | 4/55頁 |
| 文件大?。?/td> | 1958K |
| 代理商： | CY7C68014A-56PVXC |
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CY7C68013A/CY7C68014A
CY7C68015A/CY7C68016A
Document #: 38-08032 Rev. *G
Page 4 of 55
3.5
During the power-up sequence, internal logic checks the I
2
C
port for the connection of an EEPROM whose first byte is
either 0xC0 or 0xC2. If found, it uses the VID/PID/DID values
in the EEPROM in place of the internally stored values (0xC0),
or it boot-loads the EEPROM contents into internal RAM
(0xC2). If no EEPROM is detected, FX2LP enumerates using
internally stored descriptors. The default ID values for FX2LP
are VID/PID/DID (0x04B4, 0x8613, 0xAxxx where xxx = Chip
revision).
[2]
USB Boot Methods
3.6
Because the FX2LP’s configuration is soft, one chip can take
on the identities of multiple distinct USB devices.
When first plugged into USB, the FX2LP enumerates automat-
ically and downloads firmware and USB descriptor tables over
the USB cable. Next, the FX2LP enumerates again, this time
as a device defined by the downloaded information. This
patented two-step process, called ReNumeration
, happens
instantly when the device is plugged in, with no hint that the
initial download step has occurred.
Two control bits in the USBCS (USB Control and Status)
register control the ReNumeration process: DISCON and
ReNumeration
RENUM. To simulate a USB disconnect, the firmware sets
DISCON to 1. To reconnect, the firmware clears DISCON to 0.
Before reconnecting, the firmware sets or clears the RENUM
bit to indicate whether the firmware or the Default USB Device
will handle device requests over endpoint zero: if RENUM = 0,
the Default USB Device will handle device requests; if RENUM
= 1, the firmware will.
3.7
The FX2LP fully supports bus-powered designs by enumer-
ating with less than 100 mA as required by the USB 2.0 speci-
fication.
Bus-powered Applications
3.8
Interrupt System
3.8.1
FX2LP implements an autovector feature for INT2 and INT4.
There are 27 INT2 (USB) vectors, and 14 INT4 (FIFO/GPIF)
vectors. See EZUSB Technical Reference Manual (TRM) for
more details.
INT2 Interrupt Request and Enable Registers
3.8.2
The main USB interrupt is shared by 27 interrupt sources. To
save the code and processing time that normally would be
required to identify the individual USB interrupt source, the
FX2LP provides a second level of interrupt vectoring, called
Autovectoring. When a USB interrupt is asserted, the FX2LP
pushes the program counter onto its stack then jumps to
address 0x0043, where it expects to find a “jump” instruction
to the USB Interrupt service routine.
USB-Interrupt Autovectors
Table 3-1. Special Function Registers
x
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
8x
IOA
SP
DPL0
DPH0
DPL1
DPH1
DPS
PCON
TCON
TMOD
TL0
TL1
TH0
TH1
CKCON
9x
IOB
EXIF
MPAGE
Ax
IOC
Bx
IOD
IOE
OEA
OEB
OEC
OED
OEE
Cx
Dx
PSW
Ex
ACC
Fx
B
SCON1
SBUF1
INT2CLR
INT4CLR
SCON0
SBUF0
AUTOPTRH1
AUTOPTRL1
reserved
AUTOPTRH2
AUTOPTRL2
reserved
IE
IP
T2CON
EICON
EIE
EIP
EP2468STAT
EP24FIFOFLGS
EP68FIFOFLGS
EP01STAT
GPIFTRIG
RCAP2L
RCAP2H
TL2
TH2
GPIFSGLDATH
GPIFSGLDATLX
GPIFSGLDATLNOX
AUTOPTRSET-UP
Table 3-2. Default ID Values for FX2LP
Default VID/PID/DID
Vendor ID
0x04B4
Product ID
0x8613
Device release
0xAnnn
Cypress Semiconductor
EZ-USB FX2LP
Depends chip revision
(nnn = chip revision where first
silicon = 001)
Note:
2.
The I
2
C bus SCL and SDA pins must be pulled up, even if an EEPROM is not connected. Otherwise this detection method does not work properly.
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| CY7C68014A-BAXC | 制造商:Cypress Semiconductor 功能描述:MCU 8BIT CISC ROMLESS 3.3V 100TQFP - Trays |
| CY7C68015A-56LFXC | 功能描述:8位微控制器 -MCU EZ USB FX2LP LO PWR Extra GPIO COM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
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| CY7C68015A-56LTXCKA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Cypress Semiconductor 功能描述: |
| CY7C68015A-56PVXC | 功能描述:8位微控制器 -MCU EZ USB FX2LP LO PWR Extra GPIO COM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
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