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參數(shù)資料
| 型號(hào)： | M38749MFT-XXXGP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁(yè)數(shù)： | 54/92頁(yè) |
| 文件大小： | 1292K |
| 代理商： | M38749MFT-XXXGP |
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58
3874 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
D-A CONVERTER
The 3874 group has an on-chip D-A converter with 8-bit resolution
and 1 channel. The D-A conversion is performed by setting the
value in the A-D/D-A conversion register. The result of D-A con-
verter is output from DA pin by setting the DA output enable bits to
“1”. When using the D-A converter, the corresponding port direc-
tion register bit (P80/DA) should be set to “0” (input status).
The output analog voltage V is determined by the value n (base
10) in the A-D/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
DA output enable bits are cleared to “0”, and P80/DA pin becomes
high impedance. The DA output is not buffered, so connect an ex-
ternal buffer when driving a low-impedance load. When using D-A
converter, set 4.0 V or more to VCC.
s Note
When reading the A-D/D-A conversion register, the A-D conver-
sion result is read, and the set value for D-A conversion is not
read.
Fig. 61 Block diagram of D-A converter
Fig. 62 Equivalent connection circuit of D-A converter
P80/DA
Data bus
D-A conversion register (8)
R-2R resistor ladder
DA output enable bit
AVSS
VREF
“0”
“1”
MSB
“0”
“1”
R
2R
R
2R
R
2R
R
2R
R
2R
R
2R
R
2R
LSB
2R
P80/DA
D-A conversion
register
DA output enable bit
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38749T-RPD | 功能描述:EMULATION POD FOR 38000 SERIES 3 RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 配件 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關(guān)產(chǎn)品:1-Wire? 設(shè)備 產(chǎn)品目錄頁(yè)面:1429 (CN2011-ZH PDF) |
| M3874-BK001 | 制造商:Alpha Wire 功能描述: |
| M3874-BK002 | 制造商:Alpha Wire 功能描述: |
| M3874-BK005 | 制造商:Alpha Wire 功能描述: |
| M3874-BK199 | 制造商:Alpha Wire 功能描述: |
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