參數(shù)資料
型號(hào)： STPCD01
英文描述： STPC CLIENT DATASHEET / PC COMPATIBLE EMBEDED MICROPROCESSOR
中文描述： STPC客戶(hù)部件/ PC兼容的嵌入式微處理器
文件頁(yè)數(shù)： 19/61頁(yè)
文件大?。?/td> 1007K
代理商： STPCD01
PIN DESCRIPTION
Issue 2.2 - October 13, 2000
19/61
ISAOE#
Bidirectional OE Control. This signal con-
trols the OE signal of the external transceiver that
connects the IDE DD bus and ISA SA bus.
GPIOCS#
I/O General Purpose Chip Select 1.
This output signal is used by the external latch on
ISA bus to latch the data on the SD[7:0] bus. The
latch can be used by the PMU unit to control the
external peripheral devices to power down or any
other desired function.
This pin is also serves as a strap input during re-
set.
2.2.9.
IDE CONTROL
PIRQ
Primary Interrupt Request.Interrupt request
from primary IDE channel.
SIRQ
Secondary Interrupt Request. Interrupt re-
quest from secondary IDE channel.
PDRQ
Primary DMA Request. DMA request from
primary IDE channel.
SDRQ
Secondary DMA Request. DMA request
from secondary IDE channel.
PDACK#
Primary DMA Acknowledge.DMA ac-
knowledge to primary IDE channel.
SDACK#
Secondary DMA Acknowledge.DMA
acknowledge to secondary IDE channel.
PIOR#
Primary I/O Read. Primary channel read.
Active low output.
PIOW#
Primary I/O Write. Primary channel write.
Active low output.
SIOR#
Secondary I/O Read. Secondary channel
read. Active low output.
SIOW#
Secondary I/O Write.Secondary channel
write. Active low output.
2.2.10. X-BUS INTERFACE PINS / IDE DATA
RMRTCCS# / DD[15]
ROM/Real Time Clock Chip
Select. This pin is a multi-function pin. When
ISAOE# is active, this signal is used as RM-
RTCCS#. This signal is asserted if a ROM access
is decoded during a memory cycle. It should be
combined with MEMR# or MEMW# signals to
properly access the ROM. During an I/O cycle,
this signal is asserted if access to the Real Time
Clock (RTC) is decoded. It should be combined
with IOR#+ or IOW# signals to properly access the
real time clock.
When ISAOE# is inactive, this signal is used as
IDE DD[15] signal.
This signal must be ORed externally with ISAOE#
and is then connected to ROM and RTC. An
LS244 or equivalent function can be used if OE# is
connected to ISAOE# and the output is provided
with a weak pull-up resistor.
KBCS# / DD[14]
Keyboard Chip Select. This pin
is a multi-function pin. When ISAOE# is active,
this signal is used as KBCS#. This signal is assert-
ed if a keyboard access is decoded during a I/O
cycle.
When ISAOE# is inactive, this signal is used as
IDE DD[14] signal.
This signal must be ORed externally with ISAOE#
and is then connected to the keyboard. An LS244
or equivalent function can be used if OE# is con-
nected to ISAOE# and the output is provided with
a weak pull-up resistor.
RTCRW# / DD[13]
Real Time Clock RW. This pin
is a multi-function pin. When ISAOE# is active,
this signal is used as RTCRW#. This signal is as-
serted for any I/O write to port 71H.
When ISAOE# is inactive, this signal is used as
IDE DD[13] signal.
This signal must be ORed externally with ISAOE#
and then connected to the RTC. An LS244 or
equivalent function can be used if OE# is connect-
ed to ISAOE# and the output is provided with a
weak pull-up resistor.
RTCDS# / DD[12]
Real Time Clock DS. This pin is
a multi-function pin. When ISAOE# is active, this
signal is used as RTCDS. This signal is asserted
for any I/O read to port 71H.
When ISAOE# is inactive, this signal is used as
IDE DD[12] signal.
This signal must be ORed externally with ISAOE#
and is then connected to RTC. An LS244 or equiv-
alent function can be used if OE# is connected to
ISAOE# and the output is provided with a weak
pull-up resistor.
2.2.11. IPC
IRQ_MUX[3:0]
Multiplexed Interrupt Request.
These are the ISA bus interrupt signals. They are
to be encoded before connection to the STPC Cli-
ent using ISACLK and ISACLKX2 as the input se-
lection strobes.
Note that IRQ8B, which by convention is connect-
ed to the RTC, is inverted before being sent to the
interrupt controller, so that it may be connected di-
rectly to the IRQ pin of the RTC.
PCI_INT[3:0]
PCI Interrupt Request. These are
the PCI bus interrupt signals. They are to be en-
coded before connection to the STPC Client using
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