參數(shù)資料
型號： M38004M2-XXXSS
廠商： Mitsubishi Electric Corporation
元件分類： DC/DC變換器
英文描述： 1 watt dc-dc converters
中文描述： 1瓦的DC - DC轉(zhuǎn)換器
文件頁數(shù)： 43/173頁
文件大?。?/td> 4203K
代理商： M38004M2-XXXSS
HARDWARE
1-29
3800 GROUP USER’S MANUAL
Processor Modes
Single-chip mode, memory expansion mode, and microprocessor
mode can be selected by changing the contents of the processor
mode bits CM
0
and CM
1
(bits 0 and 1 of address 003B
16
). 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. 28 Memory maps in various processor modes
Fig. 29 Structure of CPU mode register
Single-Chip Mode
Select this mode by resetting the microcomputer with CNV
SS
con-
nected to V
SS
.
Memory Expansion Mode
Select this mode by setting the processor mode bits to “01” in soft-
ware with CNV
SS
connected to V
SS
. This mode enables external
memory expansion while maintaining the validity of the internal
ROM. Internal ROM will take precedence over external memory if
addresses conflict.
Microprocessor Mode
Select this mode by resetting the microcomputer with CNV
SS
con-
nected to V
CC
, or by setting the processor mode bits to “10” in
software with CNV
SS
connected to V
SS
. In microprocessor mode,
the internal ROM is no longer valid and external memory must be
used.
FUNCTIONAL DESCRIPTION
Port Name
Port P0
Port P1
Port P2
Port P3
Function
Outputs low-order byte of address.
Outputs high-order byte of address.
Operates as I/O pins for data D
7
to D
0
(including instruction codes).
P3
0
and P3
1
function only as output pins
(except that the port latch cannot be read).
P3
2
is the ONW input pin.
P3
3
is the RESET
OUT
output pin. (Note)
P3
4
is the
φ
output pin.
P3
5
is the SYNC output pin.
P3
6
is the WR output pin, and P3
7
is the
RD output pin.
Note
: If CNV
SS
is connected to V
SS
, the microcomputer goes to
single-chip mode after a reset, so this pin cannot be used
as the RESET
OUT
output pin.
Table 8.
Functions of ports in memory expansion mode and
microprocessor mode
0000
16
0008
16
SFR area
0040
16
Internal RAM
reserved area
0000
16
0008
16
0040
16
Internal RAM
reserved area
YYYY
16
Internal ROM
FFFF
16
FFFF
16
Microprocessor mode
Memory expansion mode
The shaded areas are external memory areas.
:
YYYY
16
is the start address of internal ROM.
SFR area
8
0440
16
8
0440
16
b0
CPU mode register
(CPUM : address 003B
16
)
Processor mode bits
0 0 : Single-chip mode
0 1 : Memory expansion mode
1 0 : Microprocessor mode
1 1 : Not available
Stack page selection bit
0 : 0 page
1 : 1 page
b7
Not used (return “0” when read)
b1 b0
相關(guān)PDF資料
PDF描述
M38004M3-XXXSP 1 watt dc-dc converters
M38004M3-XXXSS 1 watt dc-dc converters
M38005M1-XXXSP 4.25 Gbps Cable And PC Board Equalizer 16-QFN -40 to 85
M38005M1-XXXSS 4.25 Gbps Cable And PC Board Equalizer 16-QFN -40 to 85
M38005M2-XXXFP 1 watt dc-dc converters
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M38004M3-DXXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
M38004M3-DXXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
M38004M3-XXXFP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
M38004M3-XXXFS 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
M38004M3-XXXHP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*