HD6417706F133 Renesas Electronics America, HD6417706F133 Datasheet - Page 402

• Manufacturer Part Number: HD6417706F133
• Description: IC SUPERH MPU ROMLESS 176LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417706F133

• Core Processor: SH-3
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 103
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.75 V ~ 2.05 V
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 176-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 13 Realtime Clock (RTC)
13.3.15 RTC Control Register 1 (RCR1)
RTC control register 1 (RCR1) affects carry flags and alarm flags. It also selects whether to
generate interrupts for each flag. Because flags are sometimes set after an operand read, do not use
this register in read-modify-write processing.
RCR1 is an 8-bit read/write register. Bits CIE, AIE, and AF are initialized by a power-on reset or
manual reset. After a power-on reset or manual reset, however, the CF flag is undefined. When
using the CF flag, it must be initialized beforehand. This register is not initialized in standby
mode.
Rev. 5.00 May 29, 2006 page 352 of 698
REJ09B0146-0500
Bit
7
6, 5
4
Bit Name
CF
—
CIE
Initial Value
—
All 0
0
R/W
R/W
R
R/W
Description
Carry Flag
Status flag that indicates that a carry has occurred. CF
is set to 1 when a count-up to R64CNT or RSECCNT
occurs. A count register value read at this time cannot
be guaranteed; another read is required.
0: No count up of R64CNT or RSECCNT.
1: Count up of R64CNT or RSECCNT.
Reserved
These bits are always read as 0. The write value
should always be 0.
Carry Interrupt Enable Flag
When the carry flag (CF) is set to 1, the CIE bit enables
interrupts.
0: A carry interrupt is not generated when the CF flag is
1: A carry interrupt is generated when the CF flag is set
[Clearing condition]
When 0 is written to CF
[Setting condition]
When 1 is written to CF
set to 1
to 1