MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 296

• Manufacturer Part Number: MC-78F0712-KIT
• Description: KIT REF SYSTEM 78K0 UPD78F0712
• Manufacturer: Renesas Electronics America

Specifications of MC-78F0712-KIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18.1 Register for Confirming Reset Source
(RESF) is used to store which source has generated the reset request.
294
Many internal reset generation sources exist in the
RESF can be read by an 8-bit memory manipulation instruction.
RESET input, reset input by power-on-clear (POC) circuit, and reading RESF clear RESF to 00H.
The status of RESF when a reset request is generated is shown in Table 18-2.
Address: FFACH
Symbol
RESF
Flag
WDTRF
LVIRF
Note The value after reset varies depending on the reset source.
Caution Do not read data by a 1-bit memory manipulation instruction.
WDTRF
LVIRF
7
0
0
1
0
1
After reset: 00H
Reset Source
Table 18-2. RESF Status When Reset Request Is Generated
Figure 18-5. 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.
6
0
Note
Cleared (0)
RESET Input
CHAPTER 18 RESET FUNCTION
R
User’s Manual U17890EJ2V0UD
5
0
Internal reset request by low-voltage detector (LVI)
Internal reset request by watchdog timer (WDT)
WDTRF
Cleared (0)
Reset by POC
4
PD78F0711 and 78F0712
3
0
Set (1)
Held
Reset by WDT
2
0
. The reset control flag register
Held
Set (1)
Reset by LVI
1
0
LVIRF
0