參數(shù)資料
型號(hào)： M38869MFAHP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP80
封裝： 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80
文件頁(yè)數(shù)： 69/111頁(yè)
文件大小： 1644K
代理商： M38869MFAHP
60
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
for flash
memory
version
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
PROCESSOR MODE
Single-chip mode, memory expansion mode, and microprocessor
mode can be selected by changing the contents of the processor
mode bits (CM0 and CM1 : b1 and b0 of address 003B16). In
memory expansion mode and microprocessor mode, memory can
be expanded externally through ports P0 to P3. In these modes,
ports P0 to P3 lose their I/O port functions and become bus pins.
Fig. 61 Memory maps in various processor modes
Fig. 62 Structure of CPU mode register
(1) Single-chip mode
Select this mode by resetting the microcomputer with CNVSS con-
nected to VSS.
(2) Memory expansion mode
Select this mode by setting the processor mode bits (b1, b0) to
“01” in software with CNVSS connected to VSS. This mode enables
external memory expansion while maintaining the validity of the in-
ternal ROM.
(3) Microprocessor mode
Select this mode by resetting the microcomputer with CNVSS con-
nected to VCC, or by setting the processor mode bits to “10” in
software with CNVSS connected to VSS. In microprocessor mode,
the internal ROM is no longer valid and external memory must be
used.
Do not set this mode in the flash memory version.
Port Name
Por t P0
Por t P1
Por t P2
Por t P3
Function
Outputs low-order 8 bits of address.
Outputs high-order 8 bits of address.
Operates as I/O pins for data D7 to D0
(including instruction code).
P30 and P31 function only as output pins
(except that the port latch cannot be read).
P32 is the ONW input pin.
P33 is the RESETOUT output pin. (Note)
P34 is the
φ output pin.
P35 is the SYNC output pin.
P36 is the WR output pin, and P37 is the RD out-
put pin.
Table 15 Port functions in memory expansion mode and
microprocessor mode
Note : If CNVSS is connected to VSS, the microcomputer goes to single-
chip mode after a reset, so that this pin cannot be used as the
RESETOUT output pin.
XXXX16
000016
004016
000816
000016
YYYY16
FFFF16
000816
004016
FFFF16
Internal RAM
reserved area
Internal ROM
Memory expansion mode
The shaded area are external memory area.
The area of address 0FFE16 and 0FFF16 in M38869FFA and M38869MFA
is the SFR or the reserved area. That does not become an external area.
SFR area
XXXX16 indicates the last address of internal RAM.
YYYY16 indicates the first address of internal ROM.
SFR area
Microprocessor mode
*
*:
Internal RAM
reserved area
XXXX16
**
b0
CPU mode register
(CPUM : address 003B16)
Processor mode bits (CM1, CM0)
b1 b0
0
0: Single-chip mode
0
1: Memory expansion mode
1
0: Microprocessor mode (Note)
1
1: Not available
Stack page selection bit
0: 0 page
1: 1 page
b7
Note: This is not available for the flash memory version.
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