參數(shù)資料
型號: 34C60
廠商: SMSC Corporation
英文描述: PARALLEL PORT INTERFACE CHIP PERIPHERAL SIDE
中文描述: 并行接口芯片外設端
文件頁數(shù): 48/58頁
文件大?。?/td> 350K
代理商: 34C60
SMSC DS – PPC34C60
Page 52
Rev. 06/01/2001
ADVANCED INFORMATION
FIGURE 22 - PERIPHERAL BUS WRITE CYCLE TIMING
PARAMETER
MIN
TYP
MAX
UNITS
t1 nCS asserted to nWR asserted. This applies to any
and all of the general purpose output pins that have
been configured to operate as "special function" Chip
Select pins. This feature saves the designer from
having to implement costly address decoders.
74
[1 BCLK-10]
84
[1 BCLK]
94
[1BCLK+10]
ns
t2 nIO16 setup required to the assertion of nWR.
15
ns
t3 nIO16 hold time required from the assertion of nWR.
10
ns
t4 nWR asserted pulse width.
158
[2 BCLK-10]
168
[2 BCLK]
178
[2BCLK+10]
ns
t5 Write data valid from the assertion of nCS.
74
[1 BCLK-10]
84
[1 BCLK]
94
[1BCLK+10]
ns
t6 Write data valid hold time from the deassertion of
nWR.
74
[1 BCLK-10]
84
[1 BCLK]
94
[1BCLK+10]
ns
t7 nWR deasserted to nCS deasserted.
74
[1 BCLK-10]
84
[1 BCLK]
94
[1BCLK+10]
ns
T8 nWR deasserted to the address incremented (this is
valid only if the AUTOINC bit is set).
74
[1 BCLK-10]
84
[1 BCLK]
94
[1BCLK+10]
ns
t7
t3
t1
t2
t4
t5
t6
t8
valid
Data Valid
Address Valid
Address +1
AUTOINC bit set
nCAS
nRAS
nCS
nIO16
nRD
nWR
SD[0:15]
SA[0:7]
BUSCLK
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