UPD78F1506GF-GAT-AX Renesas Electronics America, UPD78F1506GF-GAT-AX Datasheet - Page 807

• Manufacturer Part Number: UPD78F1506GF-GAT-AX
• Description: MCU 16BIT 78K0R/LX3 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Lx3r

Specifications of UPD78F1506GF-GAT-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LCD, LVD, POR, PWM, WDT
• Number Of I /o: 78
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0R/Lx3
23.4 Cautions for Power-on-Clear Circuit
(V
of reset to the start of the operation of the microcontroller can be arbitrarily set by taking the following action.
R01UH0004EJ0401 Rev.4.01
Jul 2, 2010
POR
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.
Remark n = 0 to 7
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.
, V
PDR
2.
), the system may be repeatedly reset and released from the reset status. In this case, the time from release
If reset is generated again during this period, initialization processing <2> is not started.
A flowchart is shown on the next page.
No
Figure 23-3. Example of Software Processing After Reset Release (1/2)
Setting timer array unit
(to measure 50 ms)
50 ms has passed?
processing <1>
processing <2>
(TMIF0n = 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
; Initial setting for port.
Check the reset source, etc.
Setting of division ratio of system clock,
such as setting of timer or A/D converter.
CLK
Source: f
Timer starts (TS0n = 1).
= Internal high-speed oscillation clock (4.08 MHz (MAX.)) (default)
where comparison value = 100: ≅ 50 ms
CLK
CHAPTER 23 POWER-ON-CLEAR CIRCUIT
(4.08 MHz (MAX.))/2
Note 2
11
,
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