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參數(shù)資料
| 型號(hào)： | PCI6420 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Integrated 2-Slot PC Card & Dedicated Flash Media Controller |
| 中文描述： | 集成雙槽 PC 卡專用閃存介質(zhì)控制器 |
| 文件頁(yè)數(shù)： | 49/160頁(yè) |
| 文件大?。?/td> | 818K |
| 代理商： | PCI6420 |
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3
–
11
NOTE:
The total frequency variation must be kept below
±
100 ppm from nominal with some
allowance for error introduced by board and device variations. Trade-offs between frequency
tolerance and stability may be made as long as the total frequency variation is less than
±
100 ppm. For example, the frequency tolerance of the crystal may be specified at 50 ppm and
the temperature tolerance may be specified at 30 ppm to give a total of 80 ppm possible
variation due to the crystal alone. Crystal aging also contributes to the frequency variation.
3.7
Serial EEPROM Interface
The PCI6x20 device has a dedicated serial bus interface that can be used with an EEPROM to load certain registers
in the PCI6x20 device. The EEPROM is detected by a pullup resistor on the SCL terminal. See Table 3
–
8 for the
EEPROM loading map.
3.7.1
Serial-Bus Interface Implementation
The PCI6x20 device drives SCL at nearly 100 kHz during data transfers, which is the maximum specified frequency
for standard mode I
2
C. The serial EEPROM must be located at address A0h.
Some serial device applications may include PC Card power switches, card ejectors, or other devices that may
enhance the user
’
s PC Card experience. The serial EEPROM device and PC Card power switches are discussed
in the sections that follow.
3.7.2
Accessing Serial-Bus Devices Through Software
The PCI6x20 device provides a programming mechanism to control serial bus devices through software. The
programming is accomplished through a doubleword of PCI configuration space at offset B0h. Table 3
–
7 lists the
registers used to program a serial-bus device through software.
Table 3
–
7. PCI6x20 Registers Used to Program Serial-Bus Devices
PCI OFFSET
REGISTER NAME
DESCRIPTION
B0h
Serial-bus data
Contains the data byte to send on write commands or the received data byte on read commands.
B1h
Serial-bus index
The content of this register is sent as the word address on byte writes or reads. This register is not used
in the quick command protocol.
Write transactions to this register initiate a serial-bus transaction. The slave device address and the
R/W command selector are programmed through this register.
Read data valid, general busy, and general error status are communicated through this register. In
addition, the protocol-select bit is programmed through this register.
B2h
Serial-bus slave
address
Serial-bus control
and status
B3h
3.7.3
Serial-Bus Interface Protocol
The SCL and SDA signals are bidirectional, open-drain signals and require pullup resistors as shown in Figure 3
–
3.
The PCI6x20 device, which supports up to 100-Kb/s data-transfer rate, is compatible with standard mode I
2
C using
7-bit addressing.
All data transfers are initiated by the serial bus master. The beginning of a data transfer is indicated by a start
condition, which is signaled when the SDA line transitions to the low state while SCL is in the high state, as shown
in Figure 3
–
6. The end of a requested data transfer is indicated by a stop condition, which is signaled by a low-to-high
transition of SDA while SCL is in the high state, as shown in Figure 3
–
6. Data on SDA must remain stable during the
high state of the SCL signal, as changes on the SDA signal during the high state of SCL are interpreted as control
signals, that is, a start or a stop condition.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCI6421 | DUAL/SINGLE SOCKET CARDBUS AND ULTRAMEDIA CONTROLLER |
| PCI6611 | DUAL/SINGLE SOCKET CARDBUS AND ULTRAMEDIA CONTROLLER |
| PCI6621 | DUAL/SINGLE SOCKET CARDBUS AND ULTRAMEDIA CONTROLLER |
| PCI6515 | SINGLE SOCKET CARDBUS CONTROLLER WITH DEDICATED SMART CARD SOCKET |
| PCI6515GHK | SINGLE SOCKET CARDBUS CONTROLLER WITH DEDICATED SMART CARD SOCKET |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCI6420GHK | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI Integrated 2-Slot PC Card & Flash Cntrl RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| PCI6420ZHK | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI Integrated 2-Slot PC Card & Flash Cntrl RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| PCI6421 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DUAL/SINGLE SOCKET CARDBUS AND ULTRAMEDIA CONTROLLER |
| PCI6421GHK | 制造商:Texas Instruments 功能描述:DUAL/SGL SCKT CARDBUS AND ULTRAMEDIA CNTRLR W/ DEDICATED FLA - Trays |
| PCI6421ZHK | 制造商:Texas Instruments 功能描述:DUAL/SGL SCKT CARDBUS AND ULTRAMEDIA CNTRLR W/ DEDICATED FLA - Trays |
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