參數(shù)資料
型號: M37920FGCGP
廠商: Mitsubishi Electric Corporation
英文描述: Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
中文描述: 單片微機(jī)16位的CMOS(16位單片機(jī))
文件頁數(shù): 27/158頁
文件大?。?/td> 1261K
代理商: M37920FGCGP
27
M37920FCCGP, M37920FCCHP
M37920FGCGP, M37920FGCHP
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
MITSUBISHI MICROCOMPUTERS
Selection of processor mode
Figures 11, 12 show the bit configurations of the processor mode
registers 0, 1.
Any of the three processor modes (single-chip mode, memory ex-
pansion mode, microprocessor mode) can be selected with the fol-
lowing:
Processor mode bits of the processor mode register 0 (bits 1 and 0
at address 5E
16
; Figure 11)
Table 9 lists the selection method of a processor mode.
The memory map which the CPU can access depends on the se-
lected processor mode. Figure 13 shows the memory maps in three
processor modes.
Also, the functions of ports P0 to P4, P10, P11, and part of port P9
depend on the selected processor mode. For details, see Table 10.
In the single-chip mode, ports P0 to P4, P10, P11, and P9 function
as I/O ports. In this mode, only the internal area (SFRs, internal
RAM, internal ROM) is accessible.
In the memory expansion and microprocessor modes, external de-
vices assigned in the external memory area can be connected via
buses. Therefore, ports P0 to P4, P10, P11, and part of port P9 func-
tion as I/O pins for the address bus, data bus, bus control signals.
(Some of port functions are selectable.)
In the memory expansion mode, all of the internal area (SFRs, inter-
nal RAM, internal ROM) and external area are accessible. In the mi-
croprocessor mode, the internal area except for the internal ROM (in
other words, SFRs and internal RAM) and the external area are ac-
cessible.
Note that, when the external devices are located to an area where
the internal area and external area overlap, only the internal area
can be read/written; the external area cannot be read/written.
Table 11 lists each bus control signal’s function.
Fig. 11 Bit configuration of processor mode register 0
7
6
5
4
3
2
1
0
Processor mode register 0
Processor mode bits
0 0 : Single-chip mode
0 1 : Memory expansion mode
1 0 : Microprocessor mode
1 1 : Do not select.
Interrupt priority detection time select bits
0 0 : 7 cycles of
φ
0 1 : 4 cycles of
φ
1 0 : 2 cycles of
φ
1 1 : Do not select.
Software reset bit
By a write of
1
to this bit, the microcomputer will be reset, and then, restarted.
External bus wait number select bits
0 0 : 0 wait
0 1 : 1 wait
1 0 : 2 wait
1 1 : ALE expansion wait
Clock
φ
1
output select bit
0 :
φ
1
output is disabled. (P4
1
functions as an programmable I/O port pin.)
1 :
φ
1
output is enabled. (P4
1
functions as the clock
φ
1
output pin.)
Address
5E
16
相關(guān)PDF資料
PDF描述
M37920FCCGP Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
M37920FCCHP Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
M37920FGCHP Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
M3802 Single Chip 8 Bits Microcomputer(8位單片機(jī))
M3820 Single Chip 8 Bits Microcomputer(8位單片機(jī))
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參數(shù)描述
M37920FGCHP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
M37920S4CGP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:16 BIT CMOS MICROCOMPUTER
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