- 您现在的位置：买卖IC网 > PDF目录378075 > PSD8135V12JT (意法半导体) Flash In-System Programmable ISP Peripherals For 8-bit MCUs PDF资料下载
参数资料
| 型号： | PSD8135V12JT |
| 厂商： | 意法半导体 |
| 英文描述： | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| 中文描述： | Flash在系统可编程ISP的外设的8位微控制器 |
| 文件页数： | 58/110页 |
| 文件大小： | 1685K |
| 代理商： | PSD8135V12JT |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页当前第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页
PSD813F1
58/110
Direction Register
The Direction Register, in conjunction with the out-
put enable (except for Port D), controls the direc-
tion of data flow in the I/O Ports. Any bit set to
‘
1
’
in the Direction Register will cause the corre-
sponding pin to be an output, and any bit set to
‘
0
’
will cause it to be an input. The default mode for all
port pins is input.
Figure 29., page 60
and
Figure 30., page 61
show
the Port Architecture diagrams for Ports A/B and
C, respectively. The direction of data flow for Ports
A, B, and C are controlled not only by the direction
register, but also by the output enable product
term from the PLD AND array. If the output enable
product term is not active, the Direction Register
has sole control of a given pin
’
s direction.
An example of a configuration for a port with the
three least significant bits set to output and the re-
mainder set to input is shown in Table
25
. Since
Port D only contains three pins (shown in
Figure
32., page 63
), the Direction Register for Port D
has only the three least significant bits active.
Drive Select Register
The Drive Select Register configures the pin driver
as Open Drain or CMOS for some port pins, and
controls the slew rate for the other port pins. An
external pull-up resistor should be used for pins
configured as Open Drain.
A pin can be configured as Open Drain if its corre-
sponding bit in the Drive Select Register is set to a
‘
1.
’
The default pin drive is CMOS.
Aside: the slew rate is a measurement of the rise
and fall times of an output. A higher slew rate
means a faster output response and may create
more electrical noise. A pin operates in a high slew
rate when the corresponding bit in the Drive Reg-
ister is set to
‘
1.
’
The default rate is slow slew.
Table
26
shows the Drive Register for Ports A, B,
C, and D. It summarizes which pins can be config-
ured as Open Drain outputs and which pins the
slew rate can be set for.
Table 23. Port Pin Direction Control, Output
Enable P.T. Not Defined
Table 24. Port Pin Direction Control, Output
Enable P.T. Defined
Table 25. Port Direction Assignment Example
Table 26. Drive Register Pin Assignment
Note: 1. NA = Not Applicable.
Direction Register Bit
Port Pin Mode
0
Input
1
Output
Direction
Register Bit
Output Enable
P.T.
Port Pin Mode
0
0
Input
0
1
Output
1
0
Output
1
1
Output
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0
0
0
0
0
1
1
1
Drive
Register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Port A
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Port B
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Port C
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Port D
NA
1
NA
1
NA
1
NA
1
NA
1
Slew
Rate
Slew
Rate
Slew
Rate
相关PDF资料 |
PDF描述 |
|---|---|
| PSD8135V12MIT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD8133V20JT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD8133V20MIT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD8133V70JT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD8133V90JT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PSD8135V12MIT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD8135V12MT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD8135V15JIT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD8135V15JT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD8135V15MIT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
发布紧急采购，3分钟左右您将得到回复。