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參數(shù)資料
| 型號(hào)： | M38D29GFFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 6.25 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁(yè)數(shù)： | 34/138頁(yè) |
| 文件大?。?/td> | 2880K |
| 代理商： | M38D29GFFP |
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Rev.3.02
Apr 10, 2008
Page 127 of 131
REJ03B0177-0302
38D2 Group
2. Executing STP Instruction
Execution of the STP instruction sets the LCD enable bit (bit 3 of
the LCD mode register) and bits 0 to 5 and bit 7 of the LCD
power control register to “0” and the LCD panel turns off. To
make the LCD panel turn on after returning from the stop mode,
set these bits to “1”.
3. VL3 Pin
To use the LCD drive control circuit while VL3 is set to the
voltage equal to VCC, apply the VCC voltage to the VL3 pin and
write “1” to the VL3 connection bit of LCD power control
register (address 003816)).
4. LCD Drive Power Supply
Power supply capacitor may be insufficient with the division
resistance for LCD power supply, and the characteristic of the
LCD panel. In this case, there is the method of connecting the
bypass capacitor about 0.1
0.33μF to VL1VL3 pins. The
example of a strengthening measure of the LCD drive power
supply is shown below.
Fig. 105 Strengthening measure example of LCD drive
power supply
Notes on ROM Correction Function
1. Returning to Main Program
To return to the main program from the correction program, use
the JMP instruction (3-byte instruction).
2. Using ROM Correction Function
If the ROM correction function is used, be sure to enable the
ROM correction enable bit after setting the ROM correction
register.
3. Address
Do not set addresses other than the ROM area in the ROM
correction address registers. Also, do not set the same address in
the ROM correction address 1 register and the ROM correction
address 2 register.
4. ROM Correction Process
Include the ROM correction process in the program beforehand.
5. Using No ROM Correction Function
If the ROM correction function is not used, the ROM correction
vector can be used as normal RAM/ROM. When using as normal
RAM/ROM, be sure to set bits 1 and 0 of the ROM correction
enable register to “0” (disabled).
Notes on Clock Generating Circuit
1. Oscillation Circuit Constants
The oscillation circuit constants vary depending on the resonator.
Use values recommended by the oscillator manufacturer.
A feed-back resistor is implemented between the XIN and XOUT
pins (an external feed-back resistor may be required depending
on conditions). As no feed-back resistor is implemented between
XCIN and XCOUT, add a feedback resistor of about 10 M
Ω.
2. Transition between Modes
When the MCU transits between on-chip oscillator mode, XIN
mode, or low-speed mode, both the XIN and XCIN oscillations
must be stabilized. Be especially careful when turning the power
on and returning from stop mode. Refer to the clock state
transition diagram for a transition between each mode. Also, set
the frequency in the condition that f(XIN)
≥ 3 × (XCIN).
When XIN mode is not used (the XIN-XOUT oscillation or
external clock input to XIN is not performed), connect XIN to
VCC through a resistor.
3. Oscillation Stabilization
Before executing the STP instruction, set the values * to generate
the wait time required for oscillation stabilization to timer 1 latch
and timer 2 latch (low-order 8 bits of timer 1 and high-order 8
bits of timer 2).
*Referential values
(Set values according to your oscillator and system)
OSCSEL = “L” in the flash memory and QzROM versions:
..................................................................... 000516 or more
OSCSEL = “H” in the QzROM version:
.....................................................................01FF16 or more
4. Low-Speed Mode, XIN Mode
To use low-speed mode or XIN mode, wait until oscillation
stabilizes after enabling the XIN-XOUT and XCIN-XCOUT
oscillation, then switch to the mode.
Connect by the shortest
possible wiring.
Connect the bypass capacitor
to the VL1
VL3 pins as short
as possible.
(Referential value:0.1
0.33 μF)
VL3
VL2
VL1
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