Hardware manual

Rev. 3.0, 09/98, page 196 of 361
Bit 2Transmit-End Interrupt Enable (TEIE): This bit enables or disables the TSR-empty
interrupt (TEI) requested when the transmit-end bit (TEND) in the serial status register (SSR) is
set to “1.”
Bit 2
TEIE Description
0 The TSR-empty interrupt request (TEI) is disabled. (Initial value)
1 The TSR-empty interrupt request (TEI) is enabled.
Bit 1Clock Enable 1 (CKE1): This bit selects the internal or external clock source for the
baud rate generator. When the external clock source is selected, the SCK pin is automatically used
for input of the external clock signal.
Bit 1
CKE1 Description
0 Internal clock source. (Initial value)
When C/A = “1,” the serial clock signal is output at the SCK pin.
When C/A = “0,” output depends on the CKE0 bit.
1 External clock source. The SCK pin is used for input.
Bit 0Clock Enable 0 (CKE0): When an internal clock source is used in asynchronous mode,
this bit enables or disables serial clock output at the SCK pin.
This bit is ignored when the external clock is selected, or when synchronous mode is selected.
For further information on the communication format and clock source selection, see table 10.7 in
section 10.3, “Operation.”
Bit 0
CKE0 Description
0 The SCK pin is not used by the SCI (and is available as a (Initial value)
general-purpose I/O port).
1 The SCK pin is used for serial clock output.