Datasheet

Section 22 Synchronous Serial Communication Unit (SSU)
Page 776 of 982 REJ09B0465-0300 Rev. 3.00
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
• SOOS bit (SSO/SSI pins open-drain output select)
Selects whether the serial data output pin is CMOS output or NMOS open-drain output.
However, when the SSI output function is allocated to P57, this bit selects between NMOS
push-pull output and NMOS open-drain output. The serial data output pin is changed
according to the register setting value. For details, see section 22.3.3, Relationship between
Data Input/Output Pin and Shift Register.
• CSOS bit (SCS pin open-drain output select)
Selects whether the serial data output pin is CMOS output or NMOS open-drain output.
However, when the SCS output function is allocated to P56, this bit selects between NMOS
push-pull output and NMOS open-drain output.
• SSUMS bit (SSU mode select)
Selects which combination of the serial data input pin and serial data output pin is used.
For details, see section 22.3.3, Relationship between Data Input/Output Pin and Shift Register.