HD64F2145 datasheet(107/829 Pages) RENESAS

107 / 829 page

Rev. 2.0, 08/02, page 67 of 788

3.2.3

Serial Timer Control Register (STCR)

STCR enables or disables register access, IIC operating mode, and on-chip flash memory, and

selects the input clock of the timer counter.

Bit

Bit Name

Initial Value

R/W

Description

IICS

R/W

2C Extra Buffer Select

Specifies bits 7 to 4 of port A as output buffers similar

to SLC and SDA. These pins are used to implement

an I

2C interface only by software.

0: PA7 to PA4 are normal input/output pins.

1: PA7 to PA4 are input/output pins enabling bus

driving.

IICX1

IICX0

R/W

2C Transfer Rate Select 1 and 0

These bits control the IIC operation. These bits select

a transfer rate in master mode together with bits

CKS2 to CKS0 in the I

2C bus mode register (ICMR).

For details on the transfer rate, refer to table 16.3.

IICE

R/W

2C Master Enable

Enables or disables CPU access for IIC registers

(ICCR, ICSR, ICDR/SARX, ICMR/SAR), PWMX

registers (DADRAH/DACR, DADRAL,

DADRBH/DACNTH, DADRBL/DACNTL), and SCI

registers (SMR, BRR, SCMR).

0: SCI_1 registers are accessed in an area from

H’(FF)FF88 to H’(FF)FF89 and from H’(FF)FF8E to

H’(FF)FF8F.

SCI_2 registers are accessed in an area from

H’(FF)FFA0 to H’(FF)FFA1 and from H’(FF)FFA6 to

H’(FF)FFA7.

SCI_0 registers are accessed in an area from

H’(FF)FFD8 to H’(FF)FFD9 and from H’(FF)FFDE to

H’(FF)FFDF.

1: IIC_1 registers are accessed in an area from

H’(FF)FF88 to H’(FF)FF89 and from H’(FF)FF8E to

H’(FF)FF8F.

PWMX registers are accessed in an area from

H’(FF)FFA0 to H’(FF)FFA1 and from H’(FF)FFA6 to

H’(FF)FFA7.

IIC_0 registers are accessed in an area from

H’(FF)FFD8 to H’(FF)FFD9 and from H’(FF)FFDE to

H’(FF)FFDF.

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