參數(shù)資料
型號: M38002E2-XXXSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP64
封裝: 0.750 INCH, 1.78 MM PITCH, PLASTIC, SDIP-64
文件頁數(shù): 174/174頁
文件大?。?/td> 1752K
代理商: M38002E2-XXXSP
APPLICATION
2.4 Processor mode
2-50
3800 GROUP USER’S MANUAL
2.4.3 Processor mode application examples
(1) Application example of memory expansion in the case where the ONW (One-Wait)
function is not used
Outline : The external memory is accessed in the microprocessor mode.
At f(XIN) = 8 MHz, an available RAM is given by the following :
OE access time : ta (OE)
≤ 50 ns
Setup time for writing data : tsu (D)
≤ 65 ns
For example, the M5M5256BP-10 whose address access is 100 ns is available.
Figure 2.4.3 shows an expansion example of a 32K byte ROM and a 32K byte RAM.
Fig. 2.4.3 Expansion example of ROM and RAM
3800 group
CNVSS
ONW
AD15
8
AD14
AD0
DB0
DB7
RD
WR
M5M27C256AK-10
M5M5256BP-10
CE
A0–A14
D0–D7
OE
A0–A14
DQ1–DQ8
OE
W
8MHz
VCC = 5.0V ± 10 %
000016
800016
044016
004016
000816
FFFF16
External RAM area
(M5M5256BP)
SFR area
Internal RAM area
External RAM area
(M5M5256BP)
External ROM area
(M5M27C256AK)
Memory map
74F04
S
15
8
2
, P31
EPROM
SRAM
2
P30
P4
P5
P6
P7
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參數(shù)描述
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