UPD78F0513AGA-GAM-AX Renesas Electronics America, UPD78F0513AGA-GAM-AX Datasheet - Page 696

• Manufacturer Part Number: UPD78F0513AGA-GAM-AX
• Description: MCU 8BIT 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2r

Specifications of UPD78F0513AGA-GAM-AX

• 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: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K 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: -

78K0/Kx2
24.4 Cautions for Power-on-Clear Circuit
(V
to the start of the operation of the microcontroller can be arbitrarily set by taking the following action.
R01UH0008EJ0401 Rev.4.01
Jul 15, 2010
POC
Note 1
In a system where the supply voltage (V
<Action>
• If supply voltage fluctuation is 50 ms or less in vicinity of POC detection voltage
Notes 1.
After releasing the reset signal, wait for the supply voltage fluctuation period of each system by means of a software
counter that uses a timer, and then initialize the ports.
), the system may be repeatedly reset and released from the reset status. In this case, the time from release of reset
2.
If reset is generated again during this period, initialization processing <2> is not started.
A flowchart is shown on the next page.
No
Figure 24-3. Example of Software Processing After Reset Release (1/2)
Setting 8-bit timer H1
(to measure 50 ms)
50 ms has passed?
processing <1>
processing <2>
(TMIFH1 = 1?)
Clearing WDT
Initialization
Initialization
Reset
Yes
Power-on-clear
DD
) fluctuates for a certain period in the vicinity of the POC detection voltage
;
; f
; Setting of division ratio of system clock,
Check the reset source
Initialize the port.
Source: f
Timer starts (TMHE1 = 1).
such as setting of timer or A/D converter
PRS
= Internal high-speed oscillation clock (8.4 MHz (MAX.)) (default)
where comparison value = 102:
PRS
CHAPTER 24 POWER-ON-CLEAR CIRCUIT
(8.4 MHz (MAX.))/2
Note 2
12
,
50 ms
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