ST7FLU05MCE View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
ST7FLU05MCE
STMicroelectronics
'ST7FLU05MCE' PDF : 124 Pages View PDF
Flash program memory
ST7LUS5, ST7LU05, ST7LU09
Figure 6. Typical ICC interface
Programming tool
ICC connector
ICC cable
(See Note 3)
ICC connector
HE10 connector type
Optional
(See Note 4)
9 7 5 31
Application board
10 8 6 4 2
Application
Reset source
t(s) Application
c power supply
3.3kΩ
(See Note 5)
See Note 2
See Note 1 and Caution
See Note 1
Application
I/O
Produ t(s) ST7
lete duc 1. If the ICCCLK or ICCDATA pins are only used as outputs in the application, no signal isolation is necessary. As soon as the
so ro 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
b P implemented in case another device forces the signal. Refer to the programming tool documentation for recommended
resistor values.
- O te 2. During the ICP session, the programming tool must control the RESET pin. This can lead to conflicts between the
) le 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
t(s o network with R>1K or a reset management IC with open drain output and pull-up resistor>1K, no additional components
s are needed. In all cases the user must ensure that no external reset is generated by the application during the ICC session.
c b 3. The use of Pin 7 of the ICC connector depends on the programming tool architecture. This pin must be connected when
u O using most ST programming tools (it is used to monitor the application power supply). Please refer to the programming tool
d manual.
ro ) - 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
P t(s 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.
lete uc 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
d 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
so ro 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.
OObbsolete P 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.
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