R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 782

• Manufacturer Part Number: R8A77800ANBGAV
• Description: IC SUPERH MPU ROMLESS 449-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77800ANBGAV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 75
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 449-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 20 Realtime Clock (RTC)
20.5
There are three kinds of RTC interrupt: alarm interrupts, periodic interrupts, and carry interrupts.
An alarm interrupt request (ATI) is generated when the alarm flag (AF) in RCR1 is set to 1 while
the alarm interrupt enable bit (AIE) is also set to 1.
A periodic interrupt request (PRI) is generated when the periodic interrupt enable bits (PES2–
PES0) in RCR2 are set to a value other than 000 and the periodic interrupt flag (PEF) is set to 1.
A carry interrupt request (CUI) is generated when the carry flag (CF) in RCR1 is set to 1 while the
carry interrupt enable bit (CIE) is also set to 1.
20.6
20.6.1
After powering on and making the RCR1 register settings, reset the frequency divider (by setting
RCR2.RESET to 1) and make initial settings for all the other registers.
20.6.2
Crystal oscillator circuit constants (recommended values) are shown in table 20.4, and the RTC
crystal oscillator circuit in figure 20.5.
Table 20.4 Crystal Oscillator Circuit Constants (Recommended Values)
Rev.1.00 Dec. 13, 2005 Page 730 of 1286
REJ09B0158-0100
f
32.768 kHz
osc
Interrupts
Usage Notes
Register Initialization
Crystal Oscillator Circuit
C
10–22 pF
in
C
10–22 pF
out