UPD78F0551MA-FAA-AX Renesas Electronics America, UPD78F0551MA-FAA-AX Datasheet - Page 678

• Manufacturer Part Number: UPD78F0551MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0551MA-FAA-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 9
• 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: -

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78K0/Kx2-L
20.1 Register for Confirming Reset Source
is used to store which source has generated the reset request.
R01UH0028EJ0400 Rev.4.00
Sep 27, 2010
Many internal reset generation sources exist in the 78K0/Kx2-L microcontrollers. The reset control flag register (RESF)
RESF can be read by an 8-bit memory manipulation instruction.
RESET input, reset by power-on-clear (POC) circuit, and reading RESF set RESF to 00H.
The status of RESF when a reset request is generated is shown in Table 20-3.
Address: FFACH
Flag
WDTRF
LVIRF
Symbol
RESF
Note The value after reset varies depending on the reset source.
Caution Do not read data by a 1-bit memory manipulation instruction.
Reset Source
WDTRF
LVIRF
7
0
0
1
0
1
After reset: 00H
Table 20-3. RESF Status When Reset Request Is Generated
Figure 20-5. Format of Reset Control Flag Register (RESF)
Internal reset request is not generated, or RESF is cleared.
Internal reset request is generated.
Internal reset request is not generated, or RESF is cleared.
Internal reset request is generated.
Cleared (0)
RESET Input
6
0
Note
R
5
0
Cleared (0)
Reset by POC
Internal reset request by low-voltage detector (LVI)
Internal reset request by watchdog timer (WDT)
WDTRF
4
Set (1)
Held
Reset by WDT
3
0
CHAPTER 20 RESET FUNCTION
Held
Set (1)
Start Function)
(Except Reset
by LVI Default
Reset by LVI
2
0
1
0
Cleared (0)
Reset by LVI
Default Start
Function
LVIRF
0
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