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| 型號(hào)： | ST7PLU09MCTRE |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO8 |
| 封裝： | 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件頁(yè)數(shù)： | 38/124頁(yè) |
| 文件大小： | 1995K |
| 代理商： | ST7PLU09MCTRE |
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Flash program memory
ST7LUS5, ST7LU05, ST7LU09
Figure 5.
Typical ICC interface
1.
If the ICCCLK or ICCDATA pins are only used as outputs in the application, no signal isolation is necessary. As soon as the
programming tool is plugged to the board, even if an ICC session is not in progress, the ICCCLK and ICCDATA pins are
not available for the application. If they are used as inputs by the application, isolation such as a serial resistor has to be
implemented in case another device forces the signal. Refer to the programming tool documentation for recommended
resistor values.
2.
During the ICP session, the programming tool must control the RESET pin. This can lead to conflicts between the
programming tool and the application reset circuit if it drives more than 5mA at high level (push pull output or pull-up
resistor<1K). A schottky diode can be used to isolate the application RESET circuit in this case. When using a classical RC
network with R>1K or a reset management IC with open drain output and pull-up resistor>1K, no additional components
are needed. In all cases the user must ensure that no external reset is generated by the application during the ICC session.
3.
The use of Pin 7 of the ICC connector depends on the programming tool architecture. This pin must be connected when
using most ST programming tools (it is used to monitor the application power supply). Please refer to the programming tool
manual.
4.
Pin 9 has to be connected to the CLKIN pin of the ST7 when ICC mode is selected with option bytes disabled (35-pulse ICC
entry mode). When option bytes are enabled (38-pulse ICC entry mode), the internal RC clock (internal RC or AWU RC) is
forced. If internal RC is selected in the option byte, the internal RC is provided. If AWU RC or external clock is selected, the
AWU RC oscillator is provided.
5.
A serial resistor must be connected to ICC connector pin 6 in order to prevent contention on PA3/RESET pin. Contention
may occur if a tool forces a state on RESET pin while PA3 pin forces the opposite state in output mode. The resistor value
is defined to limit the current below 2mA at 5V. If PA3 is used as output push-pull, then the application must be switched off
to allow the tool to take control of the RESET pin (PA3). To allow the programming tool to drive the RESET pin below VIL,
special care must also be taken when a pull-up is placed on PA3 for application reasons.
Caution:
During normal operation, the ICCCLK pin must be pulled up, internally or externally
(external pull-up of 10k mandatory in noisy environment). This is to avoid entering ICC
mode unexpectedly during a reset. In the application, even if the pin is configured as output,
any reset will put it back in input pull-up.
4.5
Memory protection
There are two different types of memory protection: readout protection and write/erase
protection, either of which can be applied individually.
ICC CONNECTOR
ICCDATA
ICCCLK
RESET
V
DD
HE10 CONNECTOR TYPE
APPLICATION
POWER SUPPLY
1
2
4
6
8
10
97
5
3
PROGRAMMING TOOL
ICC CONNECTOR
APPLICATION BOARD
ICC Cable
(See Note 3)
ST7
CLK
IN
OPTIONAL
See Note 1
See Note 1 and Caution
See Note 2
APPLICATION
RESET SOURCE
APPLICATION
I/O
(See Note 4)
3.3k
(See Note 5)
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