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参数资料
型号： ST7PLITEUS5U3TR
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, DSO8
封装： LEAD FREE, DFN-8
文件页数： 13/108页
文件大小： 1957K
代理商： ST7PLITEUS5U3TR
ST7LITEUSx
12/108
FLASH PROGRAM MEMORY (Cont’d)
4.4 ICC interface
ICP needs a minimum of 4 and up to 6 pins to be
connected to the programming tool. These pins
are:
– RESET: device reset
–VSS: device power supply ground
– ICCCLK: ICC output serial clock pin (see note
1)
– ICCDATA: ICC input serial data pin
– CLKIN: main clock input for external source
–VDD: application board power supply (see
Note 3)
Figure 6. Typical ICC Interface
Notes:
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 de-
vice forces the signal. Refer to the Programming
Tool documentation for recommended resistor val-
ues.
2. During the ICP session, the programming tool
must control the RESET pin. This can lead to con-
flicts between the programming tool and the appli-
cation 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 appli-
cation RESET circuit in this case. When using a
classical RC network with R>1K or a reset man-
agement IC with open drain output and pull-up re-
sistor>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 Program-
ming 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 op-
tion byte, the internal RC is provided. If AWU RC
or external clock is selected, the AWU RC oscilla-
tor is provided.
ICC CONNECTOR
ICC
D
ATA
IC
CCLK
RE
SET
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)
1
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