參數(shù)資料
型號: PSD834F2
英文描述: Flash In-System Programmable (ISP) Peripherals For 8-bit MCUs(用于8位MCUs的閃速ISP外圍)
中文描述: Flash在系統(tǒng)可編程(ISP)為周邊8位微控制器(用于8位微控制器的閃速的ISP外圍)
文件頁數(shù): 39/98頁
文件大?。?/td> 595K
代理商: PSD834F2
39/98
PSD8XXF2/3/4/5
Figure 17. An Example of a Typical 8-bit Non-Multiplexed Bus Interface
Data Byte Enable Reference.
MCUs havediffer-
ent data byte orientations. Table 16 shows how
the PSD8xxF2/3/4/5 interprets byte/word opera-
tions in different bus write configurations. Even-
byte refers to locations with address A0 equal to 0
and odd byte as locations with A0 equal to 1.
Table 16. Eight-Bit Data Bus
Figure 18. MCU Bus Interface Examples
Figure 19 to Figure 22show examples of thebasic
connections between the PSD8xxF2/3/4/5 and
some popular MCUs. The PSD8xxF2/3/4/5 Con-
trol input pins are labeled as to the MCU function
for which they are configured. The MCU bus inter-
face is specified using the PSDsoft Express Con-
figuration.
80C31.
Figure 19 shows the bus interface for the
80C31, which has an 8-bit multiplexed address/
data bus. The lower address byte is multiplexed
with the data bus. The MCU control signals Pro-
gram Select Enable (PSEN, CNTL2), Read Strobe
(RD, CNTL1), and Write Strobe(WR, CNTL0) may
be used for accessing the internal memory and I/
O Ports blocks. Address Strobe (ALE/AS, PD0)
latches the address.
MCU
WR
RD
BHE
ALE
RESET
D[7:0]
A[15:0]
A[23:16]
D[7:0]
ADIO
PORT
PORT
A
PORT
B
PORT
C
WR(CNTRL0)
RD(CNTRL1)
BHE(CNTRL2)
RST
ALE(PD0)
PORT D
(OPTIONAL)
PSD
AI02879C
BHE
A0
D7-D0
X
0
Even Byte
X
1
Odd Byte
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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