參數(shù)資料
型號: SHARP_LH7A404
廠商: Sharp Corporation
英文描述: 32 BIT SYSTEM ON CHIP
中文描述: 32位片上系統(tǒng)
文件頁數(shù): 35/51頁
文件大?。?/td> 387K
代理商: SHARP_LH7A404
32-Bit System-on-Chip
LH7A404
Advance Data Sheet
35
Asynchronous Memory
Controller Waveforms
Figure 7 shows the waveform and timing for an
external asynchronous memory Write. Figure 8 shows
the waveform and timing for an external asynchronous
memory Read, with one wait state. Figure 9 shows the
waveform and timing for an external asynchronous
memory Read, with two wait states.
Figure 7. External Asynchronous Memory Write
Figure 8. External Asynchronous Memory Read, One Wait State
HCLK
ADDRESS
DATA
A[27:0]
(NOTE 1)
D[31:0]
nCS(X)
nBLE[3:0], nWE
t
OVA
t
OVD
t
OVD
t
OHD
t
OHCS
t
OHBLE
,
tOHWE
t
OHA
t
OVCS
t
OVBLE
, t
OVWE
LH7A404-10
NOTES:
1. A[24:0] when SCI used.
2. All signal transitions are measured from the
50% point of the clock to the 50% point of the signal.
LH7A404-11
HCLK
ADDRESS
DATA
A[25:0]
D[31:0]
nCSx
nOE
tOVOE
tOVCS
tISD
tOHA
tIHD
tOHCS
tOHOE
tOVA
1 WAIT STATE
DATA READ
NOTE:
All signal transitions are measured from the
50% point of the clock to the 50% point of the signal.
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