參數(shù)資料
型號(hào): MB86967PFV
元件分類: 微控制器/微處理器
英文描述: 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100
封裝: PLASTIC, LQFP-100
文件頁數(shù): 91/129頁
文件大?。?/td> 1519K
代理商: MB86967PFV
64
MB86967
4. Common Memory Space
Common memory space can be used if the capacity of E2PROM or flash ROM to be selected is large. The
address space is located higher than the CIS (card attribute data register) of attribute memory space (See
examples of E2PROM and flash ROM in 2).
Only even addresses are used in the CIS, but both common memory space even and odd addresses can be
used in common memory space. Only byte access (8 bits) is available.
Writing to common memory space is possible. Efficient writing is performed by data-polling the selected E2PROM
or flash ROM. However, in this case, the PwrDwn bit of CCR1 must be not set for the power-down state without
ending writing.
Batch erase should not be selected for flash ROM. When erasing common memory in blocks, take care not to
erase attribute memory space.
(1) Read from Common Memory
(2) Write to Common Memory
Mode
REG
CE2
CE1
OE
WE
PA0
PD8 to
PD15
PD0 to
PD7
ROMS
ROMRD ROMAD
Byte access
(8 bits)
11001
0
Invalid
Even byte
L
1
Invalid
Odd byte
L
Word access
(16 bits)
10001
×
Invalid
H
L
High byte only
10101
×
Invalid
H
L
Mode
REG
CE2
CE1
OE
WE
PA0
PD8 to
PD15
PD0 to
PD7
ROMS
ROMRD ROMAD
Byte access
(8 bits)
11001
0
Don’t care Even byte
L
H
L
1
Don’t care
Odd byte
L
H
L
Word access
(16 bits)
10001
×
Don’t care Don’t care
H
L
High byte only
10101
×
Don’t care Don’t care
H
L
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