Hardware manual

Rev. 3.0, 09/98, page 168 of 361
8.2.5 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 serial communication interface
and selects internal clock sources for the timer counters.
The STCR is initialized to H'F8 at a reset.
Bits 7 to 3Reserved: These bits cannot be modified and are always read as “1.”
Bit 2Multiprocessor Enable (MPE): Controls the operating mode of serial communication
interfaces 0 and 1. For details, see section 9, “Serial Communication Interface.”
Bits 1 and 0Internal Clock Source Select 1 and 0 (ICKS1 and ICKS0): These bits and bits
CKS2 to CKS0 in the TCR select clock sources for the timer counters. For details, see section
8.2.3, “Timer Control Register.”