M306N4FGTFP Renesas Electronics America, M306N4FGTFP Datasheet - Page 89

• Manufacturer Part Number: M306N4FGTFP
• Description: IC M16C MCU FLASH 100QFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/6Nr

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: -

M16C/6N Group (M16C/6N4)
Rev.2.40
REJ09B0009-0240
Table 8.4 Pin Status During Wait Mode
___________
______ _______ _________ _________
A0 to A19, D0 to D15,
_______
CS0 to CS3, BHE
RD, WR, WRL, WRH
HLDA, BCLK
ALE
I/O ports
CLKOUT
8.4.2 Wait Mode
In wait mode, the CPU clock is turned off, so are the CPU (because operated by the CPU clock) and the
watchdog timer. However, if the PM22 bit in the PM2 register is 1 (on-chip oscillator clock for the watchdog
timer count source), the watchdog timer remains active. Because the main clock, sub clock and on-chip
oscillator clock all are on, the peripheral functions using these clocks keep operating.
8.4.2.1 Peripheral Function Clock Stop Function
8.4.2.2 Entering Wait Mode
8.4.2.3 Pin Status During Wait Mode
8.4.2.4 Exiting Wait Mode
If the CM02 bit in the CM0 register is 1 (peripheral function clocks turned off during wait mode), the f1, f2,
f8, f32, f1SIO, f8SIO, f32SIO, fAD, fCAN0, and fCAN1 clocks are turned off when in wait mode, with the
power consumption reduced that much. However, fC32 remains on.
The MCU is placed into wait mode by executing the WAIT instruction.
When the CM11 bit = 1 (CPU clock source is the PLL clock), be sure to set the CM11 bit in the CM1
register to 0 (CPU clock source is the main clock) before going to wait mode. The power consumption of
the chip can be reduced by setting the PLC07 bit in the PLC0 register to 0 (PLL stops).
Table 8.4 lists the Pin Status During Wait Mode.
The MCU exits wait mode by a hardware reset, NMI interrupt or peripheral function interrupt.
If the MCU exits wait mode by a hardware reset or NMI interrupt, set the peripheral function interrupt
priority bits ILVL2 to ILVL0 to 000b (interrupt disabled) before executing the WAIT instruction.
The peripheral function interrupts are affected by the CM02 bit. If the CM02 bit is 0 (peripheral function
clocks not turned off during wait mode), peripheral function interrupts can be used to exit wait mode. If
the CM02 bit is 1 (peripheral function clocks turned off during wait mode), the peripheral functions using
the peripheral function clocks stop operating, so that only the peripheral functions clocked by external
signals can be used to exit wait mode.
Table 8.5 lists the Interrupts to Exit Wait Mode and Use Conditions.
Apr 14, 2006
_______
When fC selected
When f8, f32
selected
Pin
________
page 65 of 376
Retains status before wait mode
“H”
“H”
“L”
Retains status before wait mode
Does not become a CLKOUT pin
Memory Expansion Mode
Microprocessor Mode
______
______
Does not become a bus control pin
Retains status before wait mode
Does not stop
•CM02 bit = 0: Does not stop
•CM02 bit = 1: Retains status before
Single-chip Mode
8. Clock Generation Circuit
wait mode