MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 210

• 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

(4) Power-fail comparison mode register (PFM)
(5) Power-fail comparison threshold register (PFT)
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Caution If data is written to PFM, a wait cycle is generated. For details, see CHAPTER 27 CAUTIONS
Caution If data is written to PFT, a wait cycle is generated. For details, see CHAPTER 27 CAUTIONS FOR
The power-fail comparison mode register (PFM) is used to compare the A/D conversion result (value of the
ADCR register) and the value of the power-fail comparison threshold register (PFT).
PFM can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
The power-fail comparison threshold register (PFT) is a register that sets the threshold value when comparing the
values with the A/D conversion result.
8-bit data in PFT is compared to the higher 8 bits (FF1BH) of the 10-bit A/D conversion result.
PFT can be set by an 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
FOR WAIT.
WAIT.
Figure 13-8. Format of Power-Fail Comparison Threshold Register (PFT)
Address: FF6EH
Symbol
Address: FF6FH
Symbol
Figure 13-7. Format of Power-Fail Comparison Mode Register (PFM)
PFM
PFT
PFEN
PFEN
PFT7
7
0
1
0
1
7
Stops power-fail comparison (used as a normal A/D converter)
Enables power-fail comparison (used for power-fail detection)
Higher 8 bits of
ADCR
Higher 8 bits of
ADCR < PFT
Higher 8 bits of
ADCR
Higher 8 bits of
ADCR < PFT
PFCM
PFCM
After reset: 00H
After reset: 00H
PFT6
6
6
CHAPTER 13 A/D CONVERTER
PFT
PFT
User’s Manual U17890EJ2V0UD
PFT5
5
0
5
Power-fail comparison enable
Interrupt request signal (INTAD) generation
No INTAD generation
No INTAD generation
INTAD generation
PFT4
R/W
R/W
4
0
4
Power-fail comparison mode selection
PFT3
3
0
3
PFT2
2
0
2
PFT1
1
0
1
PFT0
0
0
0