- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45045 > M38268MCLXXXFP 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP100 PDF資料下載
參數(shù)資料
| 型號： | M38268MCLXXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 33/80頁 |
| 文件大?。?/td> | 1561K |
| 代理商： | M38268MCLXXXFP |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁當(dāng)前第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
3826 Group
38
D-A Converter
The 3826 group has an on-chip D-A converter with 8-bit resolution
and 2 channels (DAi (i=1, 2)). After the DTMF/DA1 selection bit or
CTCSS/DA2 selection bit is set to “0”, the D-A converter is per-
formed by setting the value in the D-A conversion register. The
result of D-A converter is output from DAi pin by setting the DTMF/
DA1 output enable bit or CTCSS/DA2 output enable bit to “1”.
When using the D-A converter, the corresponding port direction
register bit (P56/DA1, P57/DA2) should be set to “0” (input status)
and the pull-up resistor should be in the OFF state.
The output analog voltage V is determined by the value n (base
10) in the D-A conversion register as follows:
V=VREF n/256 (n=0 to 255)
Where VREF is the reference voltage.
At reset, the D-A conversion registers are cleared to “0016”, the
DTMF/DA1 output enable bit or CTCSS/DA2 output enable bit are
cleared to “0”, and DAi pin goes to high impedance state. The DA
output is not buffered, so connect an external buffer when driving
a low-impedance load.
s Note on applied voltage to VREF pin
When the P56/DA1 pin and P57/DA2 pin are used as I/O ports, be
sure to apply Vcc level to VREF pin.
When these pins are used as D-A conversion output pins, the Vcc
level is recommended for the applied voltage to VREF pin.
When the voltage below Vcc level is applied, the D-A conversion
accuracy may be worse.
Fig. 38 Structure of D-A control register
Fig. 39 Block diagram of D-A converter
DTMF/DA1 output enable bit
0 : Disabled
1 : Enabled
CTCSS/DA2 output enable bit
0 : Disabled
1 : Enabled
DTMF/DA1 selection bit
0 : DA1 function
1 : DTMF function
CTCSS/DA2 selection bit
0 : DA2 function
1 : CTCSS function
Low group ROM data selection bit
0 : Sine wave
1 : “0” fixed
High group ROM data selection bit
0 : Sine wave
1 : “0” fixed
High/Low group timer write control bit
0 : Write value in latch only
1 : Write value in latch and counter
CTCSS timer write control bit
0 : Write value in latch only
1 : Write value in latch and counter
b7
b0
D-A control register
(DACON : address 003616)
D-A2 conversion register (8)
R-2R resistor ladder
DA2 output enable bit
Data bus
P56/DA1
P57/DA2
5-bit adder
Selector
Low
group
ROM
5-bit 32
S
e
le
c
to
r
8-bit timer
D-A1 conversion register (8)
R-2R resistor ladder
DA1 output enable bit
XIN/2
Data bus
CTCSS
ROM
8-bit 64
10-bit timer
Selector
High
group
ROM
5-bit 32
*
S
e
le
c
to
r
S
e
le
c
to
r
* When DTMF is selected, the high-order 6 bits are automatically set
as the DTMF output.
The low-order 2 bits is set by writing data to the D-A1 conversion register.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M38267E8GP | 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PQFP100 |
| M38267M8LXXXGP | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP100 |
| M3826AMFLXXXFP | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP100 |
| M3826AEFGP | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP100 |
| M38268MCLXXXFP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP100 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M3826AEFFP#U0 | 制造商:Renesas 功能描述:MCU 8-bit 740 CISC 60KB EPROM 5V 100-Pin PQFP Tray |
| M3826AMFA-221FP#U0 | 制造商:Renesas Electronics Corporation 功能描述: |
| M3826-BK001 | 制造商:Alpha Wire 功能描述: |
| M3826-BK002 | 制造商:Alpha Wire 功能描述: |
| M3826-BK005 | 制造商:Alpha Wire 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。