9.2.5
Serial/Timer Control Register (STCR)
Bit
7
6
5
4
3
STAC
0
2
1
ICKS1
0
0
ICKS0
0
IICS
0
IICD
0
IICX
0
IICE
0
MPE
0
Initial value
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
STCR is an 8-bit readable/writable register that controls the I2C bus interface and host interface,
controls the operating mode of the serial communication interface, and selects internal clock
sources for the timer counters.
STCR is initialized to H'00 by a reset.
Bits 7 to 4—I2C Control (IICS, IICD, IICX, IICE): These bits control operation of the I2C bus
interface. For details, see section 13, I2C Bus Interface.
Bit 3—Slave Input Switch (STAC): Controls the switching of the host interface input pins. For
details, see section 14, Host Interface.
Bit 2—Multiprocessor Enable (MPE): Controls the operating mode of serial communication
interfaces 0 and 1. For details, see section 12, 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 TCR select clock sources for the timer counters. For details, see section 9.2.3,
Timer Control Register.
200
RENESAS [ RENESAS TECHNOLOGY CORP ]
