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参数资料
| 型号： | M38D5XGXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 6.25 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件页数： | 37/142页 |
| 文件大小： | 2004K |
| 代理商： | M38D5XGXFP |
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Rev.3.04
May 20, 2008
Page 131 of 134
REJ03B0158-0304
38D5 Group
3. Executing STP Instruction
Executing the STP instruction sets the LCD enable bit (bit 4 of
LCD mode register1 (address 001316)) to “0” and the LCD panel
turns off. To turn the LCD panel on after returning from stop
mode, set the LCD enable bit to “1”.
4. 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 (bit 1 of LCD mode register 2
(address 001416)).
5. LCD Drive Power Supply
Fig. 106 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
.
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 F)
VL3
VL2
VL1
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