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參數(shù)資料
| 型號： | M37273E8SP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | Single Chip 8 Bits Microcomputer(8位單片機(jī)) |
| 中文描述： | 單芯片8位單片機(jī)（8位單片機(jī)） |
| 文件頁數(shù)： | 56/138頁 |
| 文件大?。?/td> | 1327K |
| 代理商： | M37273E8SP |
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56
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
8.10.7 Reference Voltage Generating Circuit
and Comparator
The composite video signal clamped by the clamping circuit is input
to the reference voltage generating circuit and the comparator.
(1) Reference voltage generating circuit
This circuit generates a reference voltage (slice voltage) by using
the amplitude of the clock run-in pulse in line specified by the
data slice line specification circuit. Connect a capacitor between
the V
HOLD
pin and the V
SS
pin, and make the length of wiring as
short as possible so that a leakage current may not be gener-
ated.
(2) Comparator
The comparator compares the voltage of the composite video
signal with the voltage (reference voltage) generated in the refer-
ence voltage generating circuit, and converts the composite video
signal into a digital value.
Fig. 8.10.10 Clock Run-in Detect Register
8.10.8 Start Bit Detecting Circuit
This circuit detects a start bit at line decided in the data slice line
specification circuit.
The detection of a start bit is described below.
A sampling clock is generated by dividing the reference clock out-
put by the timing signal.
A clock run-in pulse is detected by the sampling clock.
After detection of the pulse, a start bit pattern is detected from the
comparator output.
8.10.9 Clock Run-in Determination Circuit
This circuit determinates clock run-in by counting the number of pulses
in a window of the composite video signal.
The reference clock count value in one pulse cycle is stored in bits 3
to 7 of the clock run-in detect register (address 00E4
16
). Read out
these bits after the occurrence of a data slicer interrupt (refer to
“8.10.12 Interrupt Request Generating Circuit”).
Figure 8.10.10 shows the structure of clock run-in detect register.
b7 b6 b5 b4 b3 b2 b1 b0
Clock run-in detect register (CRD) [Address 00E4
16
]
R W
Clock Run-in Detect Register
0
to
2
3
to
7
0
R —
Test bits
Number of reference clocks to
be counted in one clock run-in
pulse period.
Clock run-in detection bit
(CRD3 to CRD7)
0
R —
Read-only
B
After reset
Functions
Name
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M37273EFSP | Single Chip 8 Bits Microcomputer(8位單片機(jī)) |
| M37273M8 | Single Chip 8 Bits Microcomputer(8位單片機(jī)) |
| M37273MF | Single Chip 8 Bits Microcomputer(8位單片機(jī)) |
| M372F3200DJ3-C | 32M x 72 DRAM DIMM with ECC Using 16Mx4, 4K & 8K Refresh, 3.3V |
| M372F3280DJ3-C | 32M x 72 DRAM DIMM with ECC Using 16Mx4, 4K & 8K Refresh, 3.3V |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37273E8SS | 功能描述:EPROM MCU/8BIT CMOS EMULATION CH RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:適配器板 適用于相關(guān)產(chǎn)品:RCB230，RCB231，RCB212 配用:26790D-ND - RCB BREAKOUT BOARD RS232 CABLE |
| M37273EF8SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37273EFRSS | 功能描述:EMULATION MCU/8BIT CMOS EMULATIO RoHS:否 類別:編程器，開發(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)品目錄頁面:1429 (CN2011-ZH PDF) |
| M37273EFSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37273ERSS | 功能描述:EMULATION MCU/8BIT CMOS EMULATIO RoHS:否 類別:編程器，開發(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)品目錄頁面:1429 (CN2011-ZH PDF) |
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