Toshiba TX03 Series Manual page 325

13.8.1.2 Shift Edge
Leading-edge shift is used in transmission. Trailing-edge shift is used in reception.
- Leading-edge shift
Data is shifted at the leading edge of the serial clock (or the falling edge of the SCKx pin in-
put/output).
- Trailing-edge shift
Data is shifted at the trailing edge of the serial clock (or the rising edge of the SCKx pin in-
put/output).
SCK pin
SO pin
Shift register
SCK pin
SI pin
Shift register
********
bit 0 bit 1 bit 2 bit 3
76543210 * 7654321 ** 765432 *** 76543 **** 7654
(a) Leading-edge
bit 0 bit 1 bit 2 bit 3
0 ******* 10 ****** 210 *****
(b) Trailing-edge
Figure 13-17 Shift Edge
Page 303
bit 4 bit 5 bit 6
***** 765 ****** 76 ******* 7
bit 4 bit 5 bit 6
3210 **** 43210 *** 543210 ** 6543210 * 76543210
TMPM3V6/M3V4
bit 7
bit 7
2019-02-06