R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 727

Manufacturer Part Number

R0K572030S000BE

KIT DEV FOR SH7203

Manufacturer

Renesas Electronics America

Renesas Starter Kits (RSK)r

CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM

Silicon Manufacturer

Kit Contents

Silicon Family Name

Silicon Core Number

R5S72030W200FP

Tool / Board Applications

General Purpose MCU, MPU, DSP, DSC

Mcu Supported Families

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

For Use With/related Products

Lead Free Status / Rohs Status

R64CNT indicates the state of the divider circuit between 64 Hz and 1 Hz.

Reading this register, when carry from 128-Hz divider stage is generated, sets the CF bit in the

RTC control register 1 (RCR1) to 1 so that the carrying and reading 64 Hz counter are performed

at the same time is indicated. In this case, the R64CNT should be read again after writing 0 to the

CF bit in RCR1 since the read value is not valid.

After the RESET bit or ADJ bit in the RTC control register 2 (RCR2) is set to 1, the RTC divider

circuit is initialized and R64CNT is initialized.

64-Hz Counter (R64CNT)

Initial value:

This bit is always read as 0. The write value should

Indicate the state of the divider circuit between

64 Hz and 1 Hz.

always be 0.

Rev. 3.00 Sep. 28, 2009 Page 695 of 1650

16Hz 32Hz 64Hz

Section 14 Realtime Clock (RTC)

REJ09B0313-0300