Toshiba H1 Series Data Book page 335

Operation in each mode
3.14.4
(1) Mode 0 (I/O Interface Mode)
This mode allows an increase in the number of I/O pins available for transmitting
data to or receiving data from an external shift register.
This mode includes the SCLK output mode to output synchronous clock SCLK and
SCLK input mode to input external synchronous clock SCLK.
Output extension
TMP92CZ26A
TXD
SCLK
Port
Figure 3.14.11 SCLK Output Mode connection example
Output extension
TMP92CZ26A
TXD
SCLK
Port
Figure 3.14.12 Example of SCLK Input Mode Connection
Shift register
A
B
SI C
D
SCK E
F
RCK G
H
TC74HC595 or equivalent
Shift register
A
B
SI C
D
SCK E
F
RCK G
H
TC74HC595 or equivalent
External clock
92CZ26A-332
Input extension
TMP92CZ26A Shift register
RXD QH
SCLK CLOCK
Port S/
TC74HC165 or equivalent
Input extension
TMP92CZ26A
RXD QH
SCLK CLOCK
Port S/
TC74HC165 or equivalent
External clock
TMP92CZ26A
A
B
C
D
E
F
G
L
H
Shift register
A
B
C
D
E
F
G
L
H