參數(shù)資料
型號: M32000D3FP
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 66.6 MHz, RISC MICROCONTROLLER, PQFP100
封裝: 14 X 20 MM, 0.65 MM PITCH, PLASTIC, LQFP-100
文件頁數(shù): 142/155頁
文件大?。?/td> 1340K
代理商: M32000D3FP
M32000D3FP User's Manual
EXTERNAL BUS INTERFACE
6-7
6.3 Read/write operations
Read and write operations of the M32000D3FP are carried out using the address bus, data bus, and
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the R/W, BCH, BCL and DC signals. When reading, the R/W signal goes to an "H" level, and the BCH and
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BCL signals go to an "L" level. The CPU reads the data in the valid byte positions. When writing, an "L"
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level is output from R/W, and BCH and BCL are output according to the valid byte positions, so as to specify
the byte positions for writing into an external device.
Fig. 6.3.1 Read/write timing (two no-wait accesses)
Keep DC signal at the "H" level during idle cycles.
idle
read
"H"
CLKIN
BS
A8 - A30
SID, ST
BCH, BCL
BURST
D0 - D15
DC
R/W
idle
read
idle
write
idle
write
CLKIN
BS
A8 - A30
SID, ST
BCH, BCL
BURST
D0 - D15
DC
R/W
"H"
"Hi-z"
Note: "Hi-z" means high-impedance, and
indicates sampling timing.
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