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参数资料
| 型号： | MB86703PF |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP80 |
| 封装： | 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件页数： | 3/32页 |
| 文件大小： | 189K |
| 代理商： | MB86703PF |
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Plug and Play ISA Controller
MB86703
11
The three auto-conguration ports use a 12-bit ISA
address decode. The ADDRESS and WRITE_DATA
ports are located at xed addresses. The
WRITE_DATA port is located at an address alias of the
ADDRESS port. The READ_DATA port, which is the
only readable auto-conguration port, is relocatable
within the I/O range from 0x0203 to 0x03FF. The
address of the READ_DATA port is assigned by the
system software and is set by writing the proper value
to Plug and Play control register 0x00 (Set RD_DATA
Port command). The isolation protocol veries that the
location selected for the READ_DATA port is free of
conict.
The Plug and Play registers within the MB86703 are
accessed by writing the address of the desired register
to the ADDRESS port, followed by a read of data from
the READ_DATA port or a write of data to the
WRITE_DATA port. A write to the ADDRESS port may
be followed by any number of WRITE_DATA or
READ_DATA accesses to the same register location
without the need to write to the ADDRESS port before
each access.
Obtaining The Device Conguration
The driver or other application software requires a
mechanism to determine the conguration information
in order to communicate with the card. An Application
Programming Interface (API) exists to provide the
required data. Called the Plug and Play Conguration
Manager API, it is documented in the “Plug and Play
Device Driver Developer’s Guide” (Intel Publication
Number 485473-001) or equivalent documentation pro-
vided by the supplier of the Plug and Play system soft-
ware. Also see “Plug and Play Device Driver Interface
for Microsoft Windows 3.1 and MS-DOS” (available on
the Plug and Play forum on CompuServe).
The API requires only two calls to retrieve congura-
tion:
CM_GetVersion veries the presence of the
Conguration Manager.
CM_GetCong retrieves the conguration
information from an indexed, system wide table. This
information includes READ_DATA port address,
Card Select Number (CSN) and resource allocation
for each congured device.
The Conguration Manager also provides a Congura-
tion Access (CA) support interface. Two calls associ-
ated with this interface of particular interest are:
CA_GetVersion veries the presence of the
Conguration Access support interface.
CA_PnPISA_Get_Resource_Data retrieves the
resource data stored in the EEPROM connected to
the MB86703 and can be used to obtain the data
stored in the “Vendor Dened” resource data types.
MB86703 DETAILED DESCRIPTION
Operating Modes
The MB86703 features several operating modes that
permit it to be used in a variety of environments and
applications.
BUS MODES
The MB86703 operates in one of two bus modes:
ISA Mode: In this mode the addresses of the
ADDRESS and WRITE_DATA ports are 0x0279 and
0x0A79, respectively.
NEC Mode: In this mode the addresses of the
ADDRESS and WRITE_DATA ports are 0x0259 and
0x0A59, respectively, to provide compatibility with
NEC PC98-series computers.
The ISA Mode is the normal operating mode. The NEC
Mode is entered by forcing the DO input to ground dur-
ing RESET_DRV.
RESOURCE MODES
The MB86703 operates in one of two resource modes:
DMA Mode: In this mode the device supports inter-
rupts, I/O chip selects and DMA requests.
Memory Mode: In this mode the device supports
interrupts and I/O and memory chip selects.
For each of the two resource modes there are four sub-
modes. Each submode supports different numbers of
logical devices, as per the table below, and allocates
the supported resources amongst the logical devices in
different ways. See Table 2 and Figures 2 and 3.
SUBMODE
NUMBER
NUMBER OF
LOGICAL DEVICES
0
One
1Two
2Two
3
Four
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| MB86831 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-bit Embedded Controller |
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