R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 726

• Manufacturer Part Number: R5S77631Y266BGV
• Description: IC SUPERH MPU ROMLESS 499BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R5S77631Y266BGV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 266MHz
• Connectivity: Audio Codec, I²C, MMC, SCI, SIM, SIO, SSI, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 107
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Data Converters: A/D 4x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 499-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 17 Watchdog Timer and Reset (WDT)
17.4
17.4.1
Power-on reset and manual reset are available. These sources are follows.
(1)
1. Reset sources
• Input low level via PRESET pin.
• The WDTCNT overflows when the WT/IT bit in the WDTCSR is 1, and the RSTS bit is 0.
• The H-UDI reset occurs (For details, see section 42, User Debugging Interface (H-UDI)).
2. Branch destination address: H'A000 0000
3. Operation in branch
Exception code H'000 is set in the EXPEVT register. The VBR and SR registers are initialized,
and the program branches to PC =H'A000 0000. By initialization, the VBR register is set to
H'0000 0000. In the SR register, the MD, RB, and BL bits are set to 1, the FD bit is cleared to 0,
and the IMASK3 to IMASK0 bits (interrupt mask level) are set to B'1111.
The CPU and the peripheral modules are also initialized. For details, see the register descriptions
in each section.
When the power is turned on, be sure to input a low level to the PRESET pin. The TRST pin
should also be brought low level to initialize the H-UDI.
Rev. 2.00 May 22, 2009 Page 656 of 1982
REJ09B0256-0200
Power_on_reset()
{
}
Power-on reset
Operation
Reset request
EXPEVT = H'0000 0000;
VBR = H'0000 0000;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
SR.(I0-I3) = B'1111;
SR.FD = 0;
Initialize_CPU();
Initialize_Module(PowerOn);
PC = H'A000 0000;