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ST20-GP1 데이터시트(PDF) 109 Page - STMicroelectronics

부품명 ST20-GP1
상세설명  GPS PROCESSOR
PDF  116 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
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ST20-GP1 데이터시트(HTML) 109 Page - STMicroelectronics

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19.5.3 Direct DMA protocol
In this mode PlinknotAck is active high. The initial (inactive) state of the pin is low.
Figure 19.8 Byte-wide parallel port timings when using the Direct DMA protocol
Symbol Parameter
16.4 Mhz
32.7 Mhz
Units
Min
Max
Min
Max
PLink is output
tPALDOX
PlinkData hold after PlinknotAck
falling edge
330
160
ns
tDOVPAL
PlinkData valid to PlinknotAck fall-
ing transition
100
40
ns
PLink is input
tPALDIX
PlinkData hold after PlinknotAck
falling edge
00
ns
tDIVPAL
PlinkData valid to PlinknotAck fall-
ing transition
100
70
ns
PLink is input or
output
tPAHPAL
PlinknotAck high time
220
270
100
140
ns
tPALPAH
PlinknotAck low time
220
270
100
140
ns
Table 19.7 Timings for Direct mode
(Output)
(Input)
PlinknotAck
PlinkData0-7
tDOVPAL
tPAHPAL
tPALDIX
PlinkData0-7
tPALPAH
tPALDOX
tDIVPAL



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