M30624FGAFP#U5 Renesas Electronics America, M30624FGAFP#U5 Datasheet - Page 613
M30624FGAFP#U5
Manufacturer Part Number
M30624FGAFP#U5
Description
IC M16C MCU FLASH 100QFP
Manufacturer
Renesas Electronics America
Series
M16C™ M16C/60r
Datasheets
1.M30622SAFPU5.pdf
(277 pages)
2.M30622SAFPU5.pdf
(617 pages)
3.M30622SAFPU5.pdf
(308 pages)
4.M30624FGAFPU5.pdf
(275 pages)
Specifications of M30624FGAFP#U5
Core Processor
M16C/60
Core Size
16-Bit
Speed
16MHz
Connectivity
SIO, UART/USART
Peripherals
DMA, PWM, WDT
Number Of I /o
85
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
20K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 10x10b, D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
100-QFP
Cpu Family
M16C
Device Core Size
16/32Bit
Frequency (max)
16MHz
Interface Type
SIM/UART
Total Internal Ram Size
20KB
# I/os (max)
87
Number Of Timers - General Purpose
11
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.2V
On-chip Adc
10-chx10-bit
On-chip Dac
2-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
-20C to 85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
100
Package Type
PQFP
For Use With
867-1000 - KIT QUICK START RENESAS 62PM3062PT3-CPE-3 - EMULATOR COMPACT M16C/62P/30P
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M30624FGAFP#U5M30624FGAFP#D3
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
M30624FGAFP#U5M30624FGAFP#D5
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- M30622SAFPU5 PDF datasheet
- M30622SAFPU5 PDF datasheet #2
- M30622SAFPU5 PDF datasheet #3
- M30624FGAFPU5 PDF datasheet #4
- Current page: 613 of 617
- Download datasheet (9Mb)
Appendix 5
2-294
1.6 Providing of watchdog timer function by software
Figure 1.6.1. Watchdog timer by software
If a microcomputer runs away because of noise or others, it can be detected by a software watchdog timer
and the microcomputer can be reset to normal operation. This is equal to or more effective than program
runaway detection by a hardware watchdog timer. The following shows an example of a watchdog timer
provided by software.
In the following example, to reset a microcomputer to normal operation, the main routine detects errors of
the interrupt processing routine and the interrupt processing routine detects errors of the main routine.
This example assumes that interrupt processing is repeated multiple times in a single main routine process-
ing.
<The main routine>
<The interrupt processing routine>
• Assigns a single byte of RAM to a software watchdog timer (SWDT) and writes the initial value N in the
SWDT once at each execution of the main routine. The initial value N should satisfy the following condi-
tion:
N+1
As the main routine execution cycle may change because of an interrupt processing or others, the initial
value N should have a margin.
• Watches the operation of the interrupt processing routine by comparing the SWDT contents with counts
of interrupt processing after the initial value N has been set.
• Detects that the interrupt processing routine has failed and determines to branch to the program initial-
ization routine for recovery processing in the following case:
If the SWDT contents do not change after interrupt processing.
• Decrements the SWDT contents by 1 at each interrupt processing.
• Determines that the main routine operates normally when the SWDT contents are reset to the initial
value N at almost fixed cycles (at the fixed interrupt processing count).
• Detects that the main routine has failed and determines to branch to the program initialization routine for
recovery processing in the following case:
If the SWDT contents are not initialized to the initial value N but continued to decrement and if they reach
0 or less.
(Counts of interrupt processing executed in each main routine)
N
Interrupt processing
Main processing
(SWDT)
routine errors
Main routine
(SWDT)
FSET I
=N?
=N
N
Interrupt processing routine
(SWDT)
Interrupt processing
Main routine
(SWDT)
errors
0?
(SWDT) – 1
0
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Return
REIT
0
M16C / 62A Group
Mitsubishi microcomputers
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