R5F61668MZN50FPV Renesas Electronics America, R5F61668MZN50FPV Datasheet - Page 134

• Manufacturer Part Number: R5F61668MZN50FPV
• Description: MCU FLASH 1024K ROM 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61668MZN50FPV

• Core Processor: H8SX
• Core Size: 16/32-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, SmartCard, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 92
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Ram Size: 56K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 5 Voltage Detection Circuit (LVD)
5.3.2
Figure 5.3 shows the timing of a voltage monitoring interrupt by the voltage-detection circuit.
When Vcc falls below the Vdet in a state where the LVDE and LVDRI bits in LVDCR are both
set to 1, the LVDF bit is set to 1 and a voltage monitoring interrupt is requested.
The voltage monitoring interrupt signal is internally connected to IRQ14-B, so the IRQ14F bit in
the ISR is set to 1 when the interrupt is generated.
As for the IRQ14 setting, set both the ITS14 bit in PFCRB and the IRQ14E bit in the IER to 1, and
the IRQ14SR and IRQ14SF bits in the ISCR to 01 (interrupt request on falling edge).
Figure 5.4 shows the procedure for setting the voltage-monitoring interrupt.
Rev. 1.00 Jan. 29, 2010 Page 102 of 1380
REJ09B0596-0100
Voltage-monitoring
interrupt signal
(IRQ14)
Voltage Monitoring Interrupt
Voltage-monitoring
signal
IRQ14F
Figure 5.3 Timing of the Voltage-Monitoring Interrupt
LVDRI
LVDE
LVDF
Vcc
↓Write 1
↓Write 1
Vdet
Vpor
Set
Stabilization time (t
Set
POR
)
Write 0 after
reading as 1