UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 633

• Manufacturer Part Number: UPD78F0550MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0550MA-FAA-AX

• Package / Case: *
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 10MHz
• Number Of I /o: 12
• Core Processor: 78K/0
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Peripherals: LVD, POR, PWM, WDT
• Connectivity: I²C, LIN, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(2) When detecting level of input voltage from external input pin (EXLVI) (78K0/KB2-L and 78K0/KC2-L only)
When starting operation
When stopping operation
Either of the following procedures must be executed.
<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 s (MAX.)).
<5> Wait until it is checked that (input voltage from external input pin (EXLVI)
<6> Set bit 1 (LVIMD) of LVIM to 1 (generates reset signal when the level is detected).
Figure 22-7 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. Be sure to execute <1>. When LVIMK = 0, an interrupt may occur immediately after the
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)).
= 1.21 V (TYP.))) by bit 0 (LVIF) of LVIM.
2. If input voltage from external input pin (EXLVI)
3. Input voltage from external input pin (EXLVI) must be EXLVI < V
processing in <3>.
(TYP.)) when LVIMD is set to 1, an internal reset signal is not generated.
CHAPTER 22 LOW-VOLTAGE DETECTOR
Preliminary User’s Manual U19111EJ2V1UD
LVI detection voltage (V
LVI detection voltage (V
DD
.
EXLVI
= 1.21 V
EXLVI
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