參數(shù)資料
型號(hào)： M30622M4A-XXXGP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100
文件頁數(shù)： 25/40頁
文件大?。?/td> 3893K
代理商： M30622M4A-XXXGP
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Bus Control
28
W
Function
Bit symbol
Bit name
Chip select control register
Symbol
Address
When reset
CSR
000816
0116
R
b7
b6
b5
b4
b3
b2
b1
b0
CS1
CS0
CS3
CS2
CS0 output enable bit
CS1 output enable bit
CS2 output enable bit
CS3 output enable bit
CS1W
CS0W
CS3W
CS2W
CS0 wait bit
CS1 wait bit
CS2 wait bit
CS3 wait bit
0 : Chip select output disabled
(Normal port pin)
1 : Chip select output enabled
0 : Wait state inserted
1 : No wait state
Figure 1.9.1. Chip select control register
Processor mode
Memory expansion mode
Chip select signal
CS0
CS1
CS2
CS3
3000016 to CFFFF16
(640K bytes)
2800016 to
2FFFF16
(32K bytes)
0800016 to
27FFF16
(128K bytes)
When PM13=0
Microprocessor mode
3000016 to BFFFF16
(576K bytes)
0300016 to FFFFF16
(816K bytes)
When PM13=0
When PM13=1
0400016 to
07FFF16
(16K bytes)
0600016 to
07FFF16
(8K bytes)
Table 1.9.2. External areas specified by the chip select signals
(A product having an internal RAM of more than 15K bytes and a ROM of more than 192K bytes)
The timing of the chip select signal changing to “L”(active) is synchronized with the address bus. But the
timing of the chip select signal changing to “H” depends on the area which will be accessed in the next
cycle. Figure 1.9.2 shows the output example of the address bus and chip select signal.
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