參數(shù)資料
型號: MT90840AL
廠商: ZARLINK SEMICONDUCTOR INC
元件分類: 路由/交換
英文描述: Distributed Hyperchannel Switch
中文描述: TELECOM, DIGITAL TIME SWITCH, PQFP100
封裝: 14 X 20 MM, 2.80 MM HEIGHT, MO-112CC-1, MQFP-100
文件頁數(shù): 41/51頁
文件大?。?/td> 512K
代理商: MT90840AL
Data Sheet
MT90840
2-271
Figure 25 - Timing for the Parallel Port External Control Lines CTo0-3
Figure 26 - TM1 Parallel Port Transmit Timing (TM1 & PFDI = 1, PPFT is an input)
Figure 27 - Parallel Port Transmit Timing (PFDI = 0, PPFT is an output)
PDo0-7
CTo0-3
PCKT/PCKR
TCP controls the clock-edge
on which the output changes.
byte m-1
byte m
byte m+1
TCP = 1
PDo0-7
CTo0-3
byte m-1
byte m
byte m+1
CTo corresponding to
byte m
CTo corresponding to
byte m+1
PCKT/PCKR
t
cdf
TCP = 0
t
cdf
CTo corresponding to
byte m
CTo corresponding to
byte m+1
byte 0
t
sod
PDo0-7
byte 1
t
PPFH
PCKT
PPFTi (PPFP=1)
t
az
t
clkh
t
clk
t
clkl
t
za
t
PPFS
tristate
tristate
byte n
n = 2429, 2047, or 809
byte 0
t
sod
PDo0-7
byte n
byte 1
t
df
t
df
PCKT/PCKR
PPFTo (PPFP=1)
t
df
t
df
Note: The depicted output timing occurs when TCP = 0. If TCP = 1, the byte at PDo0-7 port and the PPFT line will be
output on the falling edge of the PCKT/PCKR clock.
t
az
t
za
t
clkh
t
clk
t
clkl
tristate
tristate
PPFTo (PPFP=0)
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