Datasheet
Table Of Contents
- Notes regarding these materials
- General Precautions in the Handling of MPU/MCU Products
- How to Use This Manual
- Table of Contents
- Quick Reference by Address B-
- 1. Overview
- 2. Central Processing Unit (CPU)
- 2.1 Data Registers (R0, R1, R2 and R3)
- 2.2 Address Registers (A0 and A1)
- 2.3 Frame Base Register (FB)
- 2.4 Interrupt Table Register (INTB)
- 2.5 Program Counter (PC)
- 2.6 User Stack Pointer (USP) and Interrupt Stack Pointer (ISP)
- 2.7 Static Base Register (SB)
- 2.8 Flag Register (FLG)
- 2.8.1 Carry Flag (C Flag)
- 2.8.2 Debug Flag (D Flag)
- 2.8.3 Zero Flag (Z Flag)
- 2.8.4 Sign Flag (S Flag)
- 2.8.5 Register Bank Select Flag (B Flag)
- 2.8.6 Overflow Flag (O Flag)
- 2.8.7 Interrupt Enable Flag (I Flag)
- 2.8.8 Stack Pointer Select Flag (U Flag)
- 2.8.9 Processor Interrupt Priority Level (IPL)
- 2.8.10 Reserved Area
- 3. Memory
- 4. Special Function Registers (SFRs)
- 5. Reset
- 6. Processor Mode
- 7. Clock Generation Circuit
- 8. Protection
- 9. Interrupt
- 10. Watchdog Timer
- 11. DMAC
- 12. Timer
- 13. Serial I/O
- 14. A/D Converter
- 15. CRC Calculation Circuit
- 16. Programmable I/O Ports
- 16.1 Port Pi Direction Register (PDi Register, i = 1, 6 to 10)
- 16.2 Port Pi Register (Pi Register, i = 1, 6 to 10)
- 16.3 Pull-up Control Register 0 to Pull-up Control Register 2 (PUR0 to PUR2 Registers)
- 16.4 Port Control Register
- 16.5 Pin Assignment Control register (PACR)
- 16.6 Digital Debounce function
- 17. Flash Memory Version
- 17.1 Flash Memory Performance
- 17.2 Memory Map
- 17.3 Functions To Prevent Flash Memory from Rewriting
- 17.4 CPU Rewrite Mode
- 17.5 Register Description
- 17.6 Precautions in CPU Rewrite Mode
- 17.6.1 Operation Speed
- 17.6.2 Prohibited Instructions
- 17.6.3 Interrupts
- 17.6.4 How to Access
- 17.6.5 Writing in the User ROM Space
- 17.6.6 DMA Transfer
- 17.6.7 Writing Command and Data
- 17.6.8 Wait Mode
- 17.6.9 Stop Mode
- 17.6.10 Low Power Consumption Mode and On-chip Oscillator-Low Power Consumption Mode
- 17.7 Software Commands
- 17.8 Status Register
- 17.9 Standard Serial I/O Mode
- 17.10 Parallel I/O Mode
- 18. Electrical Characteristics
- 19. Usage Notes
- 19.1 SFR
- 19.2 PLL Frequency Synthesizer
- 19.3 Power Control
- 19.4 Protect
- 19.5 Interrupts
- 19.6 DMAC
- 19.7 Timer
- 19.8 Serial I/O
- 19.9 A/D Converter
- 19.10 Programmable I/O Ports
- 19.11 Electric Characteristic Differences Between Mask ROM
- 19.12 Mask ROM Version
- 19.13 Flash Memory Version
- 19.13.1 Functions to Inhibit Rewriting Flash Memory
- 19.13.2 Stop mode
- 19.13.3 Wait mode
- 19.13.4 Low power dissipation mode, on-chip oscillator low power dissipation mode
- 19.13.5 Writing command and data
- 19.13.6 Program Command
- 19.13.7 Operation speed
- 19.13.8 Instructions prohibited in EW0 Mode
- 19.13.9 Interrupts
- 19.13.10 How to access
- 19.13.11 Writing in the user ROM area
- 19.13.12 DMA transfer
- 19.13.13 Regarding Programming/Erasure Times and Execution Time
- 19.13.14 Definition of Programming/Erasure Times
- 19.13.15 Flash Memory Version Electrical Characteristics 10,000 E/W cycle product
- 19.13.16 Boot Mode
- 19.14 Noise
- 19.15 Instruction for a Device Use
- Appendix 1. Package Dimensions
- Appendix 2. Functional Difference
- Register Index
- REVISION HISTORY
5. Reset
page 33
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Figure 5.5.1.1 Power Supply Down Detection Interrupt Generation Block
Figure 5.5.1.2 Power Supply Down Detection Interrupt Generation Circuit Operation Example
Output of the digital filter
(2)
D42 bit in D4INT register
NOTES :
1. D40 bit in the D4INT register is set to “1” (voltage down
detection interrupt enabled).
2. Output of the digital filter is shown in Figure 5.5.1.1
.
Voltage down
detection
interrupt signal
No voltage down detection interrupt signals are
generated when the D42 bit is “1”.
sampling
VC13 bit in VCR1 register
VC
C
sampling sampling sampling
Set to “0” by program (not detected)
Voltage down detection interrupt generation circuit
Watchdog
timer interrupt
signal
VC27
VC13
Voltage Down Detection Circuit
D4INT clock(the
clock with which it
operates also in
wait mode)
D42
DF1, DF0
1/2
00b
01b
10b
11b
1/2
1/21/8
Non-maskable
interrupt signal
Oscillation stop,
re-oscillation
detection
interrupt signal
Voltage down
detection
interrupt signal
Watchdog Timer Block
This bit is set to “0”(not detected) by program.
Watchdog timer
underflow signal
D43
D41
CM02
WAIT instruction(wait mode)
D40
VCC
VREF
+
-
Noise
Rejection
(Rejection Range:200 ns)
Voltage down
detection signal
The Voltage down detection
signal becomes “H” when the
VC27 bit is set to “0” (disabled)
Noise Rejection
Circuit
Digital
Filter
CM10
The D42 bit is set to “0” (not detected)
by program. the VC27 bit is set to “0”
(voltage down detect circuit disabled),
the D42 bit is set to “0”.