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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： | 8/32页 |
| 文件大小： | 189K |
| 代理商： | MB86703PF |
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MB86703
Plug and Play ISA Controller
16
As previously described, the registers are accessed for
read and write operations via the ADDRESS,
WRITE_DATA and READ_DATA auto-conguration
ports (see Table 1). The ADDRESS and WRITE_DATA
ports have dened ISA addresses.
In a PnP system, the READ_PORT address is normally
assigned by the PnP system software during
Isolation.
In that environment, the address of the READ_DATA
port can be determined by using the CM_GetCong
call to the Conguration Manager as previously
described. In a non-PnP system, the READ_DATA port
address will have been assigned by the conguration
utility used to congure the card, and can be deter-
mined as appropriate for that software.
Table 5. MB86703 Standard PnP Register
Exceptions
ADD
EXCEPTION
0x71,
0x73
Bit<0> does not perform any function.
The type of interrupt (level or edge)
cannot be controlled by the MB86703
and will depend entirely on the type of
input signal supplied at the INT inputs.
0x42,
0x4A
The MB86703 supports only the
‘upper limit’ method of specifying the
memory chip select range. Thus, bit 0
of these registers is read only and is
internally set to a ‘1’.
Table 6. EEPROM Write Enable/Write Disable (0x22)
BIT
DESCRIPTION
<0>
Setting this bit to a “1” enables writes
to the serial EEPROM, clearing it
disables such writes. After setting or
clearing this bit, a 0x00 command
must be issued to the EEPROM
Command Register to transfer the
enable/disable command to the
EEPROM. The EEPROM will remain
write enabled (or disabled) until
another enable/disable command is
issued.
<7:1>
Not implemented.
Table 7. EEPROM Write Data Low (0x23)
BIT
DESCRIPTION
<7:0>
The lower byte of the word which is to
be written into the EEPROM at the
next EEPROM write operation.
Table 8. EEPROM Write Data High (0x24)
BIT
DESCRIPTION
<7:0>
The upper byte of the word which is to
be written into the EEPROM at the
next EEPROM write operation.
Table 9. MB86703 PnP State (0x25)
BIT
DESCRIPTION
<0>
0 = Not in the
Wait for Key state.
1 = In the
Wait for Key state.
<1>
0 = Not in the
Sleep state.
1 = In the
Sleep state.
<2>
0 = Not in the
Isolation state.
1 = In the
Isolation state.
<3>
0 = Not in the
Configuration state.
1 = In the
Configuration state.
<4>
0 = DMA mode
1 = Memory mode
<6:5>
Submode
<7>
Not used. ‘0’ when read.
Table 10. EEPROM Command (0x26)
BIT
DESCRIPTION
<7:0>
Writing 0x00 into this register causes
a write enable/disable command to be
sent to the serial EEPROM. Register
0x22 must be set/cleared before this
command is issued. See Table 6.
Writing a 0x01 into this register
initiates an EEPROM write cycle,
causing the contents of registers 0x23
and 0x24 to be written into the
EEPROM. The EEPROM must have
been write enabled before this
command is issued.
Writing 0x03 into this register causes
the EEPROM read pointer to be reset
to point at the first word of the
EEPROM, address 0x000.
CAUTION: If this command is
invoked, the current EEPROM read
pointer address is overwitten, and
subsequent operations may be
incorrect. The MB86703 should be
reset before resuming normal
operation.
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相关代理商/技术参数 |
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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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| MB86832 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-bit Embedded Controller |
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