Toshiba H1 SERIES TLCS-900 - Manual (Page 195)

TMP92CM22
2007-02-16 92CM22-193
2. Shift edge
Data is transmitted on the leading edge of the clock and received on the trailing
edge.
Leading edge shift
Data is shifted on the leading edge of the serial clock (on the falling edge of the
SCK pin input/output).
Trailing edge shift
Data is shifted on the trailing edge of the serial clock (on the rising edge of the
SCK pin input/output).
Figure 3.10.24 Shift Edge
********
SCK pin
SO pin Bit0 Bit1 Bit7
Shift register 76543210 *7654321 **765432 ***76543 ****7654 *****765 ******76 *******7
(a) Leading shift
SCK pin
SI pin
Shift register 7******* 76****** 765***** 7654**** 76543*** 765432** 7654321* 76543210
(b) Trailing shift
*: Don’t care
Bit2 Bit3 Bit4 Bit5 Bit6
Bit0 Bit1 Bit7 Bit2 Bit3 Bit4 Bit5 Bit6