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| 型號(hào)： | VT8231 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 晶體 |
| 英文描述： | CRYSTAL 8.00MHZ 18PF SMD |
| 中文描述： | 南橋伏特，PC99柔順 |
| 文件頁(yè)數(shù)： | 27/132頁(yè) |
| 文件大小： | 1210K |
| 代理商： | VT8231 |
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VT8231
Preliminary Revision 0.8
October 29, 1999
-21-
Pinouts
7HFKQRORJLHV,QF
:H &RQQHFW
Conventional BIOS ROM / ISA Bus Interface
Signal Name
Pin #
I/O
Signal Description
LA21
/ USBOC3# / GPO21
LA20
/ USBOC2# / GPO20
SA[19:18],
SA17
/ strap,
SA16
/ strap,
SA[15:0]
/ SDD[15:0]
Y13
W13
O
System Address Bus
. Allows access to physical memory
devices (e.g., BIOS ROMs) up to 4 Mbytes.
System Address Bus
. These address lines are used to
interface to BIOS ROMs but may also be used to
implement a subset of the ISA bus if required. SA[19-16]
are connected to ISA bus SA[19-16] directly. SA[19-17]
are also connected to LA[19-17] of the ISA bus.
V13, U13,
T13,
Y14,
W18, V17, Y17, W16,
V15, Y15, W14, T15,
U15, U16, V14, W15,
Y16, V16, W17, Y18
V10
W10
Y10
U10
T10
V11
W11
Y11
T11
R11
U11
U12
Y12
W12
V12
R12
U7
IO
SD15
/ LGNT2# / GPO11,
SD14
/ LREQ2# / GPI13,
SD13
/ LGNT1# / GPO10,
SD12
/ LREQ1# / GPI12,
SD11
/ HGNT2# / GPO9,
SD10
/ HREQ2# / GPI11,
SD9
/ HGNT1# / GPO8,
SD8
/ HREQ1# / GPI10,
SD7
,
SD6
,
SD5
,
SD4
,
SD3
,
SD2
,
SD1
,
SD0
IOR#
/ GPO22
IO / O / O
IO / I / I
IO / O / O
IO / I / I
IO / O / O
IO / I / I
IO / O / O
IO / I / I
IO
IO
IO
IO
IO
IO
IO
IO
IO
System Data.
SD[15:0] provide the data path for BIOS
ROMs and for devices residing on the ISA bus. SD0-7
also output general purpose output information when
GPOWE# is active.
I/O Read.
IOR# is the command to an ISA I/O slave
device that the slave may drive data on to the ISA data bus.
I/O Write.
IOW# is the command to an ISA I/O slave
device that the slave may latch data from the ISA data bus.
Memory Read.
MEMR# is the command to a memory
slave that it may drive data onto the ISA data bus.
Memory Write.
MEMW# is the command to a memory
slave that it may latch data from the ISA data bus.
Interrupt 1 (optional external Keyboard Controller).
Interrupt 8 (optional external RTC).
Interrupt 12 (optional external PS2 Mouse Controller).
Interrupt 14 (IDE Primary Channel).
Interrupt 15 (IDE Secondary Channel).
Speaker Drive.
Output of internal timer/counter 2.
IOW#
/ GPO23
T7
IO
MEMR#
W9
IO
MEMW#
Y9
IO
IRQ1
/ MSCK
IRQ8#
/ GPI1
IRQ12
/ MSDT
IRQ14
IRQ15
SPKR
N2
V3
N4
T14
U14
U9
I / IO
I / I
I / IO
I
I
O
Serial IRQ
Signal Name
Pin #
I/O
Signal Description
SERIRQ
V9
I
Serial IRQ
(Rx68[3] = 1 and Rx74[6] = 0)
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