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| 型号： | M38D59GC-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件页数： | 38/142页 |
| 文件大小： | 2004K |
| 代理商： | M38D59GC-XXXFP |
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Rev.3.04
May 20, 2008
Page 132 of 134
REJ03B0158-0304
38D5 Group
Notes on Flash Memory Mode
CPU Rewrite Mode
(1) Operating Speed
During CPU rewrite mode, set the system clock
φ to 4.0 MHz or
less using the main clock division ratio selection bits (bits 6 and
7 of address 003B16).
(2) Prohibited Instructions
During CPU rewrite mode, the instructions which reference data
in the flash memory cannot be used.
(3) Interrupts
During CPU rewrite mode, interrupts cannot be used because
they reference data in the flash memory.
(4) Watchdog Timer
If the watchdog timer has been running already, the internal reset
by underflow will not occur because the watchdog timer is
continuously cleared during program or erase operation.
(5) Reset
Reset is always valid. If CNVSS = “H” when a reset is released,
boot mode is active. The program starts from the address stored
in addresses FFFC16 and FFFD16 in boot ROM area.
Notes on Watchdog Timer
1. Watchdog Timer Underflow
The watchdog timer does not operate in stop mode, but it
continues counting during the wait time to release the stop state
and in wait mode. Write to the watchdog timer control register so
that the watchdog timer will not underflow during these periods.
2. Stopping On-Chip Oscillator Oscillation
When the on-chip oscillator is selected by the watchdog timer
count source selection bit 2, the on-chip oscillator forcibly
oscillates and it cannot be stopped. Also, in this time, set the STP
instruction function selection bit to “1” at this time.
Select “0” (
φSOURCE) for the watchdog timer count source
selection bit 2 at the system which on-chip oscillator is stopped.
3. Watchdog Timer Control Register
Bits 7 to 5 can be rewritten only once after a reset. After writing,
rewriting is disabled because they are locked. These bits are set
to “0” after a reset.
Notes on Differences between Flash Memory Version
and QzROM Version
The flash memory and QzROM versions differ in their
manufacturing processes, built-in ROM, memory size, and
layout patterns. Because of these differences, characteristic
values, operation margins, noise immunity, and noise radiation
and oscillation circuit constants may vary within the specified
range of electrical characteristics.
When switching to the QzROM version, implement system
evaluations equivalent to those performed in the flash memory
version.
Confirm page 11 about the differences of functions.
Notes on Power Source Voltage
When the power supply voltage value of the MCU is less than
the value indicated in the recommended operating conditions, the
MCU may not operate normally and perform unstable operation.
In a system where the power source voltage drops slowly when
the power source voltage drops or the power is turned off, reset
the MCU when the power source voltage is less than the
recommended operating conditions, and design the system so
that this unstable operation does not cause errors to it.
Notes on Handling Power Source Pins
Before using the MCU, connect a capacitor suitable for high
frequencies as a bypass capacitor between the following:
The power source pin (VCC pin) and the GND pin (VSS pin)
The power source pin (VCC pin) and the analog power source
input pin (AVSS pin). As a bypass capacitor, a ceramic capacitor
of 0.01
F to 0.1 F is recommended.
Also, use the shortest possible wiring to connect a bypass
capacitor between the power source pin and the GND pin and
between the power source pin and the analog power source pin.
Notes on Memory
1. RAM
The RAM content is undefined at a reset. Be sure to set the initial
value before use.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M38D59GFFP#U0 | 功能描述:IC 740/38D5 MCU QZ-ROM 80QFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 标准包装:250 系列:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR) |
| M38D59GFHP#U0 | 功能描述:IC 740/38D5 MCU QZ-ROM 80LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 标准包装:250 系列:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR) |
| M38D59T-RLFS | 功能描述:BOARD EMULATOR FOR 38D5 GROUP RoHS:否 类别:编程器，开发系统 >> 内电路编程器、仿真器以及调试器 系列:- 产品变化通告:Development Systems Discontinuation 19/Jul/2010 标准包装:1 系列:* 类型:* 适用于相关产品:* 所含物品:* |
| M38DC-15 | 制造商:M/A-COM Technology Solutions 功能描述:MIXER(SPEC UX1015) - Bulk |
| M38K00F1-16FP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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