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M38040F2HKP датащи(PDF) 190 Page - Renesas Technology Corp

номер детали M38040F2HKP
подробное описание детали  8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  387 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M38040F2HKP датащи(HTML) 190 Page - Renesas Technology Corp

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APPLICATION
2.4 Serial interface
Rev.1.00 Jan 14, 2005
REJ09B0212-0100Z
3804 Group (Spec.H)
(2)
Output of serial data (control of peripheral IC)
Outline : 4-byte data is transmitted and received, using the clock synchronous serial I/O.
The CS signal is output to a peripheral IC through port P63.
Figure 2.4.25 shows connection diagrams of example for using serial I/O1 and example for using
serial I/O2 with the same specification, and Figure 2.4.26 shows a timing chart.
Fig. 2.4.25 Connection diagrams
Specifications : • Serial I/O is used (clock synchronous serial I/O is selected.)
• Synchronous clock frequency : 125 kHz (f(XIN) = 4 MHz is divided by 32)
• Transfer direction : LSB first
• The Serial I/O interrupt is not used.
• Port P63 is connected to the CS pin (“L” active) of the peripheral IC for transmission
control; the output level of port P63 is controlled by software.
Fig. 2.4.26 Timing chart (serial I/O1)
P63
CS
Peripheral IC
(1) Example for using Serial I/O1
DATA
CS
CLK
CLK
DATA
TXD1
SCLK1
P63
CS
Peripheral IC
(2) Example for using Serial I/O2
DATA
CS
CLK
CLK
DATA
SOUT2
SCLK2
3804 group
(Spec. H)
3804 group
(Spec. H)
CS
DO0
DO1
DO2
DO3
CLK
DATA
Note: When using serial I/O2, the SOUT2 pin becomes the high-impedance state
after transfer is completed.



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