Hardware manual
Rev. 3.0, 09/98, page 204 of 361
10.2.9 Serial/Timer Control Register (STCR)H'FFC3
Bit:76543210
MPE ICKS1 ICKS0
Initial value:11111000
Read/Write: R/W R/W R/W
The STCR is an 8-bit readable/writable register that controls the operating mode of the serial
communication interface and selects input clock sources for the 8-bit timer counters (TCNT).
The STCR is initialized to H'F8 by a reset.
Bits 7 to 3Reserved: These bits cannot be modified and are always read as “1.”
Bit 2Multiprocessor Enable (MPE): Enables or disables the multiprocessor communication
function on channels SCI0 and SCI1.
Bit 2
MPE Description
0 The multiprocessor communication function is disabled, (Initial value)
regardless of the setting of the MP bit in SMR.
1 The multiprocessor communication function is enabled. The multi-
processor format can be selected by setting the MP bit in SMR to “1.”
Bits 1 and 0Internal Clock Source Select 1 and 0 (ICKS1, ICKS0): These bits select the
clock input to the timer counters (TCNT) in the 8-bit timers. For further information see section 7,
“8-Bit Timers.”