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ST52T301 bảng dữ liệu(PDF) 38 Page - STMicroelectronics

tên linh kiện ST52T301
Giải thích chi tiết về linh kiện  8-Bit OTP/EPROM DuaLogic] MCUs WITH ADC, UART, TIMER, TRIAC & PWM DRIVER
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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ST52T301 bảng dữ liệu(HTML) 38 Page - STMicroelectronics

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8.2 INPUT HANDSHAKE
Figure 8.5 illustrates the timing associated with the
READY Handshake signal, when the instruction
LDRI reg 6 is performed.
When the LDRI instruction is executed to read the
port, ST52x301 resets the READY signal to
indicate that it is not possible to change the input
data during this phase of reading.
To synchronizethe transmission with READY signal
will prevent the INP_PORT data from changing
while ST52x301 is reading the port.
READ PORT signal represented in figure 8.5 is an
ST52x301 internal signal.
Input data on the port are continuously sampled
and are strobed into the port only when READY is
set.
W.A.R.P.3TC
x
x
x
x
x
x0
x
REG_CONF1
P(7:0)
IOP
EXTERNAL
PERIPHERAL
DATA
R EADY
I/O
PORT
Figure 8.4. One Line Input Handshake
PIO(7:0)
READY
DATA IN
READ PORT
CLK
NEW DATA IN
Figure 8.5. One Line Input Handshake Timing
38/99
ST52T301/E301



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