Serial/Timer Control Register (Stcr) - Renesas Hitachi H8S/2194 Series Hardware Manual

8.3.5

Serial/Timer Control Register (STCR)

:
Bit
:
Initial value
:
R/W
STCR is an 8-bit readable/writable register that controls register access, the I
operating mode, and on-chip flash memory (in F-ZTAT versions), and also selects the I
interface serial clock frequency. For details on functions not related to on-chip flash memory,
see section 25.2.7, Serial/Timer Control Register (STCR), and descriptions of individual
modules. If a module controlled by STCR is not used, do not write 1 to the corresponding bit.
STCR is initialized to H'00 by a reset.
2
Bits 6 to 5: I C Control (IICX, IICRST)
These bits control the operation of the I
Interface.
Bit 3: Flash Memory Control Register Enable (FLSHE)
Setting the FLSHE bit to 1 enables read/write access to the flash memory control registers. If
FLSHE is cleared to 0, the flash memory control registers are deselected. In this case, the flash
memory control register contents are retained.
Bit 3
FLSHE Description
0 Flash memory control registers deselected
1 Flash memory control registers selected
Bits 7, 4 and 2 to 0: Reserved
7 6 5
— IICX IICRST
0 0 0
— R/W R/W
2
C bus interface. For details, see section 25, I
4 3 2
— FLSHE —
0 0 0
— R/W —
Rev. 2.0, 11/00, page 187 of 1037
1 0
— —
0 0
— —
2
C bus interface
2
C bus
2
C Bus
(Initial value)