UPD78F0500MC-5A4-A Renesas Electronics America, UPD78F0500MC-5A4-A Datasheet - Page 706

• Manufacturer Part Number: UPD78F0500MC-5A4-A
• Description: MCU 8BIT FLASH SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2r

Specifications of UPD78F0500MC-5A4-A

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 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
(2) When detecting level of input voltage from external input pin (EXLVI)
R01UH0008EJ0401 Rev.4.01
Jul 15, 2010
• When starting operation
• When stopping operation
<1> Mask the LVI interrupt (LVIMK = 1).
<2> Set bit 2 (LVISEL) of the low-voltage detection register (LVIM) to 1 (detects level of input voltage from
<3> Set bit 7 (LVION) of LVIM to 1 (enables LVI operation).
<4> Use software to wait for an operation stabilization time (10
<5> Wait until it is checked that (input voltage from external input pin (EXLVI) ≥ detection voltage (V
<6> Set bit 1 (LVIMD) of LVIM to 1 (generates reset signal when the level is detected).
Figure 25-6 shows the timing of the internal reset signal generated by the low-voltage detector. The numbers in
this timing chart correspond to <1> to <6> above.
Cautions 1. <1> must always be executed. When LVIMK = 0, an interrupt may occur immediately after the
Either of the following procedures must be executed.
•
•
When using 8-bit memory manipulation instruction:
Write 00H to LVIM.
When using 1-bit memory manipulation instruction:
Clear LVIMD to 0 and then LVION to 0.
external input pin (EXLVI)).
(TYP.))) by bit 0 (LVIF) of LVIM.
2. If input voltage from external input pin (EXLVI) ≥ detection voltage (V
3. Input voltage from external input pin (EXLVI) must be EXLVI < V
processing in <3>.
when LVIMD is set to 1, an internal reset signal is not generated.
CHAPTER 25 LOW-VOLTAGE DETECTOR
μ
s (MIN.)).
DD
.
EXLVI
= 1.21 V (TYP.))
EXLVI
= 1.21 V
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