Serial Control Register X (Scrx) - Renesas H8S/2633 Series Hardware Manual

18.2.7

Serial Control Register X (SCRX)

Bit : 7
—
Initial value : 0
R/W : R/W
SCRX is an 8-bit readable/writable register that controls register access, the I
operating mode (when the on-chip IIC option is included), and on-chip flash memory control (F-
ZTAT versions). If a module controlled by SCRX is not used, do not write 1 to the corresponding
bit.
SCRX is initialized to H'00 by a reset and in hardware standby mode.
Bit 7—Reserved: Do not set 1.
2
Bits 6 and 5—I C Transfer Select 1 and 0 (IICX1 and IICX0): These bits, together with bits
CKS2 to CKS0 in ICMR of IIC1 and IIC0, select the transfer rate in master mode. For details, see
2
section 18.2.4, I C Bus Mode Register (ICMR).
2
Bit 4—I C Master Enable (IICE): Controls CPU access to the I
registers (ICCR, ICSR, ICDR/SARX, and ICMR/SAR).
Bit 4
IICE Description
0 CPU access to I
1 CPU access to I
Bit 3—Flash Memory Control Register Enable (FLSHE): Controls the operation of the flash
memory in F-ZTAT versions. For details, see section 22, ROM.
Bits 2 to 0—Reserved: Do not set 1.
824
6 5
IICX1 IICX0 IICE
0 0
R/W R/W R/W
2
C bus interface data and control registers is disabled
2
C bus interface data and control registers is enabled
4 3 2
FLSHE
—
0 0 0
R/W R/W
2
C bus interface data and control
1 0
—
—
0 0
R/W R/W
2
C interface
(Initial value)