UPD78F1144AGB-GAH-AX Renesas Electronics America, UPD78F1144AGB-GAH-AX Datasheet - Page 643

• Manufacturer Part Number: UPD78F1144AGB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1144AGB-GAH-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(2) When detecting level of input voltage from external input pin (EXLVI)
• 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 the following periods of time (Total 410
<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 20-7 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. <1> must always be executed. When LVIMK = 0, an interrupt may occur immediately
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.
• Operation stabilization time (10
• Minimum pulse width (200
• Detection delay time (200
2. If input voltage from external input pin (EXLVI) ≥ detection voltage (V
3. Input voltage from external input pin (EXLVI) must be EXLVI < V
after the processing in <3>.
when LVIMD is set to 1, an internal reset signal is not generated.
CHAPTER 20 LOW-VOLTAGE DETECTOR
μ
μ
s (MAX.))
s (MIN.))
User’s Manual U17854EJ9V0UD
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s (MAX.))
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.
EXLVI
= 1.21 V (TYP.))
EXLVI
641
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