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TMP86CS49FG 데이터시트(PDF) 177 Page - Toshiba Semiconductor

부품명 TMP86CS49FG
상세설명  8 Bit Microcontroller
PDF  252 Pages
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제조업체  TOSHIBA [Toshiba Semiconductor]
홈페이지  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMP86CS49FG 데이터시트(HTML) 177 Page - Toshiba Semiconductor

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TMP86CS49FG
(2) External clock
When an external clock is selected by setting SIO1CR<SCK> to “111B”, the clock via the SCK1
pin from an external source is used as the serial clock.
To ensure shift operation, the serial clock pulse width must be 4/fc or more for both “H” and “L”
levels.
Figure 14-3 External Clock
14.3.1.2 Shift edge
The leading edge is used to transmit data, and the trailing edge is used to receive data.
(1) Leading edge shift
Data is shifted on the leading edge of the serial clock (falling edge of the SCK1 pin input/output).
(2) Trailing edge shift
Data is shifted on the trailing edge of the serial clock (rising edge of the SCK1 pin input/output).
Figure 14-4 Shift Edge
tSCKL
tSCKH
tSCKL, tSCKH > 4/fc
SCK1
pin
7*******
********
Bit7
Shift out
***01234
**012345
*0123456
Bit5
Bit6
Bit5
Bit6
Bit7
67******
567*****
(a) Leading edge shift (Example of MSB transfer)
(b) Trailing edge shift (Example of MSB transfer)
01234567
****0123
*****012
******01
*******0
********
Bit4
4567****
34567***
234567**
1234567*
01234567
Bit4
Bit3
Bit2
Bit1
Bit0
Bit3
Bit2
Bit1
Bit0
SIO1CR<SIOS>
SCK1
pin
Shift register
SO1 pin
Shift register
SCK1
pin
SI1 pin
SIO1CR<SIOS>



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