參數(shù)資料
型號(hào)： CY3687
廠商： Cypress Semiconductor Corp.
英文描述： MoBL-USB⑩ FX2LP18 USB Microcontroller
中文描述： 的MoBL - USB FX2LP18的USB微控制器⑩
文件頁(yè)數(shù)： 9/39頁(yè)
文件大小： 453K
代理商： CY3687
CY7C68053
Document # 001-06120 Rev *H
Page 9 of 39
3.14.1 Three Control OUT Signals
The 56-pin package brings out three of these signals,
CTL0–CTL2. The 8051 programs the GPIF unit to define the CTL
waveforms. CTLx waveform edges can be programmed to make
transitions as fast as once per clock cycle (20.8 ns using a
48 MHz clock).
3.14.2 Two Ready IN Signals
The FX2LP18 package brings out all two Ready inputs
(RDY0–RDY1). The 8051 programs the GPIF unit to test the
RDY pins for GPIF branching.
3.14.3 Long Transfer Mode
In master mode, the 8051 appropriately sets GPIF transaction
count registers (GPIFTCB3, GPIFTCB2, GPIFTCB1, or
GPIFTCB0) for unattended transfers of up to 2
32
transactions.
The GPIF automatically throttles data flow to prevent under or
overflow until the full number of requested transactions
complete. The GPIF decrements the value in these registers to
represent the current status of the transaction.
3.15 ECC Generation
[6]
The MoBL-USB can calculate Error Correcting Codes (ECCs) on
data that passes across its GPIF or Slave FIFO interfaces. There
are two ECC configurations: two ECCs, each calculated over
256 bytes (SmartMedia Standard) and one ECC calculated over
512 bytes.
The ECC can correct any 1-bit error or detect any 2-bit error.
3.15.1 ECC Implementation
The two ECC configurations are selected by the ECCM bit.
3.15.1.1 ECCM = 0
Two 3-byte ECCs are each calculated over a 256-byte block of
data. This configuration conforms to the SmartMedia Standard.
This configuration writes any value to ECCRESET, then passes
data across the GPIF or Slave FIFO interface. The ECC for the
first 256 bytes of data is calculated and stored in ECC1. The ECC
for the next 256 bytes is stored in ECC2. After the second ECC
is calculated, the values in the ECCx registers do not change
until ECCRESET is written again, even if more data is subse-
quently passed across the interface.
3.15.1.2 ECCM = 1
One 3-byte ECC is calculated over a 512-byte block of data.
This configuration writes any value to ECCRESET then passes
data across the GPIF or Slave FIFO interface. The ECC for the
first 512 bytes of data is calculated and stored in ECC1; ECC2
is unused. After the ECC is calculated, the value in ECC1 does
not change until ECCRESET is written again, even if more data
is subsequently passed across the interface.
3.16 USB Uploads and Downloads
The core has the ability to directly edit the data contents of the
internal 16-kByte RAM and of the internal 512-byte scratch pad
RAM using a vendor-specific command. This capability is
normally used when ‘soft’ downloading user code and is
available only to and from internal RAM, only when the 8051 is
held in reset. The available RAM spaces are 16 kBytes from
0x0000–0x3FFF
(code/data)
0xE000–0xE1FF (scratch pad data RAM).
[7]
and
512
bytes
from
3.17 Autopointer Access
FX2LP18 provides two identical autopointers. They are similar to
the internal 8051 data pointers, but with an additional feature:
they can optionally increment after every memory access. The
autopointers are available in external FX2LP18 registers, under
control of a mode bit (AUTOPTRSET-UP.0). Using the external
FX2LP18 autopointer access (at 0xE67B – 0xE67C) allows the
autopointer to access all RAM. Also, the autopointers can point
to any FX2LP18 register or endpoint buffer space.
3.18 I
2
C Controller
FX2LP18 has one I
2
C port that is driven by two internal
controllers. One controller automatically operates at boot time to
load the VID/PID/DID, configuration byte, and firmware. The
second controller is used by the 8051, once running, to control
external I
2
C devices. The I
2
C port operates in master mode only.
3.18.1 I
2
C Port Pins
The I
2
C pins SCL and SDA must have external 2.2K ohm pull up
resistors even if no EEPROM is connected to the FX2LP18. The
value of the pull up resistors required may vary, depending on
the combination of V
CC_IO
and the supply used for the EEPROM.
The pull up resistors used must be such that when the EEPROM
pulls SDA low, the voltage level meets the V
IL
specification of the
FX2LP18. For example, if the EEPROM runs off a 3.3V supply
and V
CC_IO
is 1.8V, the pull up resistors recommended are 10K
ohm
.
This requirement may also vary depending on the devices
being run on the I
2
C pins. Refer to the I
2
C specifications for
details.
External EEPROM device address pins must be configured
properly. See
Table 6
on page 10 for configuring the device
address pins.
If no EEPROM is connected to the I
2
C port, EEPROM emulation
is required by an external processor. This is because the
FX2LP18 comes out of reset with the DISCON bit set, so the
device will not enumerate without an EEPROM (C2 load) or
EEPROM emulation.
Notes
6. To use the ECC logic, the GPIF or Slave FIFO interface must be configured for byte-wide operation.
7. After the data has been downloaded from the host, a ‘loader’ can execute from internal RAM in order to transfer downloaded data to external memory.
[+] Feedback
相關(guān)PDF資料
PDF描述
CY37128VP160-100BAXC 5V, 3.3V, ISRTM High-Performance CPLDs
CY37032P44-125AC 5V, 3.3V, ISRTM High-Performance CPLDs
CY37064P44-200AC 5V, 3.3V, ISR⑩ High-Performance CPLDs
CY37064P44-200JC 5V, 3.3V, ISR⑩ High-Performance CPLDs
CY37384VP100-200JXC 5V, 3.3V, ISRTM High-Performance CPLDs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CY3688 功能描述:界面開(kāi)發(fā)工具 CY3688 RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類(lèi)型:RS-485 工具用于評(píng)估:ADM3485E 接口類(lèi)型:RS-485 工作電源電壓:3.3 V
CY3690 功能描述:開(kāi)發(fā)板和工具包 - 其他處理器 USB 2.0 DVEL KIT RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類(lèi)型:I2C, SPI, USB 工作電源電壓:
CY3691 功能描述:開(kāi)發(fā)板和工具包 - 其他處理器 USB 2.0 DVEL KIT RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類(lèi)型:I2C, SPI, USB 工作電源電壓:
CY3692 功能描述:時(shí)鐘和定時(shí)器開(kāi)發(fā)工具 Socket adapter "for CY23FP12" RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類(lèi)型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V
CY3693 制造商:CYPRESS 制造商全稱(chēng):Cypress Semiconductor 功能描述:PTG Programming Kit
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*