參數(shù)資料
型號: PCI1520I
廠商: Texas Instruments, Inc.
英文描述: PC CARD CONTROLLERS
中文描述: PC卡控制器
文件頁數(shù): 33/138頁
文件大?。?/td> 745K
代理商: PCI1520I
219
Table 213. CardBus PC Card Interface System Terminals (Slots A and B)
TERMINAL
NUMBER
I/O
DESCRIPTION
NAME
SLOT A
PDV
SLOT B
PDV
GHK
GHK
CCLK
115
M14
48
P06
O
CardBus clock. CCLK provides synchronous timing for all transactions on the
CardBus interface. All signals except CRST, CCLKRUN, CINT, CSTSCHG, CAUDIO,
CCD2, CCD1, CVS2, and CVS1 are sampled on the rising edge of CCLK, and all
timing parameters are defined with the rising edge of this signal. CCLK operates at
the PCI bus clock frequency, but it can be stopped in the low state or slowed down
for power savings.
CCLKRUN
142
H15
74
R09
I/O
CardBus clock run. CCLKRUN is used by a CardBus PC Card to request an increase
in the CCLK frequency, and by the PCI1520 to indicate that the CCLK frequency is
going to be decreased.
CRST
126
L15
58
W05
O
CardBus reset. CRST brings CardBus PC Card-specific registers, sequencers, and
signals to a known state. When CRST is asserted, all CardBus PC Card signals are
placed in a high-impedance state, and the PCI1520 drives these signals to a valid
logic level. Assertion can be asynchronous to CCLK, but deassertion must be
synchronous to CCLK.
Terminal name for slot A is preceded with A_. For example, the full name for terminals 115 and M14 is A_CCLK.
Terminal name for slot B is preceded with B_. For example, the full name for terminals 48 and P06 is B_CCLK.
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