M306N4FGTFP Renesas Electronics America, M306N4FGTFP Datasheet - Page 372
M306N4FGTFP
Manufacturer Part Number
M306N4FGTFP
Description
IC M16C MCU FLASH 100QFP
Manufacturer
Renesas Electronics America
Series
M16C™ M16C/6Nr
Datasheets
1.M30622SAFPU5.pdf
(308 pages)
2.M306N4FGGPU3.pdf
(94 pages)
3.M306N4FGGPU3.pdf
(414 pages)
Specifications of M306N4FGTFP
Core Processor
M16C/60
Core Size
16-Bit
Speed
20MHz
Connectivity
CAN, I²C, IEBus, SIO, UART/USART
Peripherals
DMA, WDT
Number Of I /o
85
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
10K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 26x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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M16C/6N Group (M16C/6N4)
Rev.2.40
REJ09B0009-0240
23.6 Interrupts
23.6.1 Reading Address 00000h
23.6.2 Setting SP
23.6.3 NMI Interrupt
Do not read the address 00000h in a program. When a maskable interrupt request is accepted, the CPU
reads interrupt information (interrupt number and interrupt request priority level) from the address
00000h during the interrupt sequence. At this time, the IR bit for the accepted interrupt is set to 0.
If the address 00000h is read in a program, the IR bit for the interrupt which has the highest priority among
the enabled interrupts is set to 0. This causes a problem that the interrupt is canceled, or an unexpected
interrupt request is generated.
Set any value in the SP (USP, ISP) before accepting an interrupt. The SP (USP, ISP) is set to 0000h after
reset. Therefore, if an interrupt is accepted before setting any value in the SP (USP, ISP), the program
may go out of control.
Especially when using NMI interrupt, set a value in the ISP at the beginning of the program. For the first
and only the first instruction after reset, all interrupts including NMI interrupt are disabled.
•
•
•
•
•
_______
The NMI interrupt cannot be disabled. If this interrupt is unused, connect the NMI pin to VCC via a
resistor (pull-up).
The input level of the NMI pin can be read by accessing the P8_5 bit in the P8 register. Note that the
P8_5 bit can only be read when determining the pin level in NMI interrupt routine.
Stop mode cannot be entered into while input on the NMI pin is low. This is because while input on the
NMI pin is low the CM10 bit in the CM1 register is fixed to 0.
Do not go to wait mode while input on the NMI pin is low. This is because when input on the NMI pin
goes low, the CPU stops but CPU clock remains active; therefore, the current consumption in the chip
does not drop. In this case, normal condition is restored by an interrupt generated thereafter.
The low and high level durations of the input signal to the NMI pin must each be 2 CPU clock cycles +
300 ns or more.
Apr 14, 2006
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page 348 of 376
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23. Usage Notes
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