参数资料
型号: MB91V301CR-ESE1
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 68 MHz, RISC MICROCONTROLLER, CPGA179
封装: CERAMIC, PGA-179
文件页数: 13/139页
文件大小: 1482K
代理商: MB91V301CR-ESE1
MB91301 Series
11
(Continued)
Pin no.
Pin name
I/O circuit type
Function
MB91301/
302A
MB91V301/
V301A
MB91301,
MB91V301
MB91302A,
MB91V301A
32
37
WR0/
(UUB) /
DQMUU
C
[WR0] External bus write strobe output.
When WR is used as the write strobe, this
becomes the byte-enable pin (UUB).
Select signal (DQMUU) of D31 to D24 at
using of SDRAM.
33
38
WR1/ (ULB)
/DQMUL
J
[WR1] External bus write strobe output. The
pin has this function when WR1 output is
enabled. When WR is used as the write
strobe, this becomes the byte-enable pin
(ULB). Select signal (DQMUL) of D23 to
D16 at using of SDRAM.
P85
[P85] General purpose input/output port.
The pin has this
function when the external bus write-enable
output is disabled.
34
39
WR2/ (LUB)
/DQMLU
J
[WR2] External bus write strobe output. The
pin has this function when WR2 output is
enabled. When WR is used as the write
strobe, this becomes the byte-enable pin
(LUB). Select signal (DQMLU) of D08 to
D05 at using of SDRAM.
P86
[P86] General purpose input/output port.
The pin has this function when the external
bus write-enable output is disabled.
35
40
WR3/ (LLB)
/DQMLL
J
[WR3] External bus write strobe output. The
pin has this function when WR3 output is
enabled. When WR is used as the write
strobe, this becomes the byte-enable pin
(LLB). Select signal (DQMLL) of D07 to
D00 at using of SDRAM.
P87
[P87] General purpose input/output port.
The pin has this functions when the exter-
nal bus write-enable output is disabled.
36
43
SYSCLK
C
[SYSCLK] System clock output. The pin
has this function when system clock output
is enabled. This outputs the same clock as
the external bus operating frequency.
(Output halts in stop mode.)
P90
[P90] General purpose input/output port.
The pin has this function when system
clock output is disabled.
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