Acer 390 Series, Руководство по обслуживанию

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2-12 Service Guide
Table 2-2 PCI1250 Terminal Functions
Name No. I/O Type Function
WE P03 D16 O Write enable. WE is used to strobe memory write
data into 16-bit memory PC Cards. WE is also use
for memory PC Cards that employ programmable
memory technologies.
DMA terminal count. This pin is used as TC during
DMA operations to a 16-bit PC Card which supports
DMA. The PC1031 asserts this signal to indicate
terminal count for a DMA read operation.
WP
(IOIS16) U07 B09 I Write protect. This signal applies to 16-bit memory
PC Cards. WP reflects the status of the write-
protect switch on 16-bit memory PC Cards. For 16-
bit l/O cards, WP is used for the 16-bit port
(IOSI16) function.
IOIS16 (I/O is 16-bits). This signal applies to 16-bit
l/O PC Cards. IOIS16 is asserted by the 16-bit PC
Card when the address on the bus corresponds to
an address to which the 16-bit PC Card responds
and the l/O port that is addressed is capable of 16-
bit accesses.
DMA request. This pin can be used as the DMA
request signal during DMA operations to a 16-bit
PC Card which supports DMA. If used, the PC Card
asserts this signal to indicate a request for a DMA
operation
VS1
VS2 Y03
U03 A11
B14 I/O Voltage Sense 1 and Voltage Sense 2. VS1 and
VS2, when used in conjunction with each other,
determine the operating voltage of the 16-bit PC
Card.
Cardbus PC Card Interface System Terminals
Slot A
5
Slot B
6
CCLK T01 A17 O CardBus PC Card Clock. This signal provides
synchronous timing for all transactions on the ]
CardBus interface. All signals except CRST,
CCLKRUN, CINT, CSTSCHG. CAUDIO, CCD2:1,
and CVS2.1 are sampled on the rising edge of the
CCLK, and all timing parameters are defined with
the rising edge of this signal. The CardBus clock
operates at the PCI bus clock frequency, but it can
be stopped in the low state or slowed down for
power savings.
5
Terminal name for slot A is preceded with A_. For example, the full name for terminal N03 is A_CPAR.
6
Terminal name for slot B s preceded with B_. For example, the full name for terminal A19 is B_CPAR.