- 您現在的位置：買賣IC網 > PDF目錄376249 > PSD301R-A-20JI (意法半導體) Low Cost Field Programmable Microcontroller Peripherals PDF資料下載
參數資料
| 型號： | PSD301R-A-20JI |
| 廠商： | 意法半導體 |
| 英文描述： | Low Cost Field Programmable Microcontroller Peripherals |
| 中文描述： | 低成本現場可編程微控制器外圍設備 |
| 文件頁數： | 25/85頁 |
| 文件大小： | 691K |
| 代理商： | PSD301R-A-20JI |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁當前第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁
PSD3XX Famly
22
12.0
Control Signals
Consult your MCU data sheet to determine which control signals your MCU generates, and
how they operate. This section is intended to show which control signals should be
connected to what pins on the PSD3XX. You will then use PSDsoft to configure the
PSD3XX, based on the combination of control signals that your MCU outputs, for example
RD, WR, and PSEN.
The PSD3XX is compatible with the following control signals:
ALE or AS (polarity is programmable)
WR or R/W
RD/E or RD/E/DS (DS for non-3X1 devices only)
BHE or PSEN
A19/CSI
RESET (polarity is programmable except on low voltage versions with the V suffix).
12.1 ALE or AS
Connect the ALE or AS signal from your MCU to this pin where applicable, and program
the polarity using PSDsoft. The trailing edge (when the signal goes inactive) of ALE or AS
latches the address on any pins that have an address input. If you are using a
non-multiplexed-bus MCU that does not output an ALE or AS signal, this pin can be used
for a generic input to the PAD.
Note: if your data is multiplexed with address lines other
than A0-A7
, connect your address pins to AD0/A0-AD15/A15, and connect your data to
Port A (and Port B where applicable), and connect the ALE/AS signal to this pin.
12.2 WR or R/W
Your MCU should output a stand-alone write signal (WR) or a multiplexed read/write signal
(R/W). In either case, the signal should be connected to this pin.
12.3 RD/E/DS (DS option not available on 3X1 devices)
Your MCU should output any one of RD, E (clock), or DS. In any case, connect the
appropriate signal to this pin.
12.4 BHE or PSEN
J
If your MCU does not output either of these signals, tie this pin to Vcc
(through a series resistor), and skip to the next signal.
J
If you use an 8-bit 8031 compatible MCU that outputs a separate signal when
accessing program space, such as PSEN, connect it to this pin. You would then use
PSDsoft to configure the EPROM in the PSD3XX to respond to PSEN only or PSEN
and RD. If you have an 8031 compatible MCU, refer to the “Program/Data Space and
the 8031” section for further information.
J
If you are using a 16-bit MCU, connect the BHE (or similar signal) output to this pin.
BHE enables accessing of the upper byte of the data bus. See Table 6 for information
on how this signal is used in conjunction with the A0 address line.
BHE
A
0
0
1
0
1
Operation
0
0
1
1
Whole Word
Upper Byte From/To Odd Address
Lower Byte From/To Even Address
None
Table 6. Truth Table for BHE and Address Bit A0 (16-bit MCUs only)
相關PDF資料 |
PDF描述 |
|---|---|
| PSD301R-A-20JM | Low Cost Field Programmable Microcontroller Peripherals |
| PSD301R-A-25J | Low Cost Field Programmable Microcontroller Peripherals |
| PSD301R-A-25JI | Low Cost Field Programmable Microcontroller Peripherals |
| PSD301R-A-25JM | Low Cost Field Programmable Microcontroller Peripherals |
| PSD301R-A-70J | Low Cost Field Programmable Microcontroller Peripherals |
相關代理商/技術參數 |
參數描述 |
|---|---|
| PSD301R-A-20JM | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low Cost Field Programmable Microcontroller Peripherals |
| PSD301R-A-25J | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low Cost Field Programmable Microcontroller Peripherals |
| PSD301R-A-25JI | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low Cost Field Programmable Microcontroller Peripherals |
| PSD301R-A-25JM | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low Cost Field Programmable Microcontroller Peripherals |
| PSD301R-A-70J | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low Cost Field Programmable Microcontroller Peripherals |
發布緊急采購，3分鐘左右您將得到回復。