UPD78F0552MA-FAA-AX Renesas Electronics America, UPD78F0552MA-FAA-AX Datasheet - Page 700

• Manufacturer Part Number: UPD78F0552MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0552MA-FAA-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 9
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0/Kx2-L
(2) When detecting level of input voltage from external input pin (EXLVI) (78K0/KB2-L and 78K0/KC2-L only)
R01UH0028EJ0400 Rev.4.00
Sep 27, 2010
• When starting operation
• When stopping operation
Figure 22-10 shows the timing of the interrupt signal generated by the low-voltage detector. The numbers in this
timing chart correspond to <1> to <8> above.
Caution Input voltage from external input pin (EXLVI) must be EXLVI < V
Either of the following procedures must be executed.
•
•
<1>
<2>
<3>
<4>
<5>
<6>
<7>
<8>
<9>
When using 8-bit memory manipulation instruction:
Write 00H to LVIM.
When using 1-bit memory manipulation instruction:
Clear LVION to 0.
Mask the LVI interrupt (LVIMK = 1).
Set bit 2 (LVISEL) of the low-voltage detection register (LVIM) to 1 (detects level of input voltage from
external input pin (EXLVI)).
Clear bit 1 (LVIMD) of LVIM to 0 (generates interrupt signal when the level is detected) (default value).
Set bit 7 (LVION) of LVIM to 1 (enables LVI operation).
Use software to wait for an operation stabilization time (10
Confirm that “input voltage from external input pin (EXLVI) ≥ detection voltage (V
when detecting the falling edge of EXLVI, or “input voltage from external input pin (EXLVI) < detection
voltage (V
Clear the interrupt request flag of LVI (LVIIF) to 0.
Release the interrupt mask flag of LVI (LVIMK).
Execute the EI instruction (when vector interrupts are used).
EXLVI
= 1.21 V (TYP.))” when detecting the rising edge of EXLVI, at bit 0 (LVIF) of LVIM.
CHAPTER 22 LOW-VOLTAGE DETECTOR
μ
s (MAX.)).
DD
.
EXLVI
= 1.21 V (TYP.))”
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