[Mac撚] 用家/買機集中討論(19) MBP愈出愈貴
國際牌關愛座
1001 回覆
11 Like
5 Dislike
所以佢有三個負皮
再推
所以唔洗咁上心
我之前講過
1. win進步咗
2. Mac退步咗
3. Mac愈嚟愈貴
4. XPS靚仔過MacBook
5. 15”唔好哂錢上i9
6. 我Win/Mac雙修
7. 翻新機幾抵
8. 13”輕便過15”
都有人負皮
你就知呢度有啲狗係on9
我之前講過
1. win進步咗
2. Mac退步咗
3. Mac愈嚟愈貴
4. XPS靚仔過MacBook
5. 15”唔好哂錢上i9
6. 我Win/Mac雙修
7. 翻新機幾抵
8. 13”輕便過15”
都有人負皮
你就知呢度有啲狗係on9
第八點都負就真心on9
可能佢地覺我我咁樣即係踩緊15”
令Apple賺少咗
令Apple賺少咗
我近排都研究緊呢個問題，不過我一部type-C Mac都無響手測試
我睇過資料話USB type-C個power delivery standard係會響行power嗰條pin/線之內，用一個低速signal protocol去俾兩端device去溝通用電狀態，包括voltage，wattage，amperage，有無插AC mains
言下之意，響MBP插尿袋呢個case，假設雙方都跟足spec做，MBP會根據你有無外插火牛去決定叉尿袋定係由尿袋拎電
我睇過資料話USB type-C個power delivery standard係會響行power嗰條pin/線之內，用一個低速signal protocol去俾兩端device去溝通用電狀態，包括voltage，wattage，amperage，有無插AC mains
言下之意，響MBP插尿袋呢個case，假設雙方都跟足spec做，MBP會根據你有無外插火牛去決定叉尿袋定係由尿袋拎電
hmm諗真d其實我有type-C Mac，係iMac 2017
佢本身，我個OWC dock，同埋隻G-RAID，三樣野都有TB3 port同各自有火牛
我三個port都叉到我隻type-C PD尿袋
但係因為無一個係可以甩火牛用所以唔知MB/MBP會點
(同一個尿袋插Nintendo Switch係永遠啱方向，會叉switch無試過掉轉)
佢本身，我個OWC dock，同埋隻G-RAID，三樣野都有TB3 port同各自有火牛
我三個port都叉到我隻type-C PD尿袋
但係因為無一個係可以甩火牛用所以唔知MB/MBP會點
(同一個尿袋插Nintendo Switch係永遠啱方向，會叉switch無試過掉轉)
有冇辦法令個keyboard有倉頡碼？係咪有塊透明嘢可以舖上去？
明白
因為我google 過好似無乜人問呢樣嘢，我以為係我d keyword 有問題
thanks 坦巴
因為我google 過好似無乜人問呢樣嘢，我以為係我d keyword 有問題
thanks 坦巴
google搵唔到係因為真係亂撚到冚家鏟，同埋已經進入electric engineering範疇
https://www.digikey.hk/en/articles/techzone/2017/mar/designing-in-usb-type-c-and-using-power-delivery-for-rapid-charging
For the designer, other notable aspects of the USB PD Specification are the ability of host and peripheral to “negotiate” voltage and current levels using VBUS pins (i.e. without relying on data lines) and the ability to deliver power in either direction without recourse to connector switching. This capability allows, for example, a display connected to mains power to be used to charge a laptop while simultaneously presenting information from the portable computer. Finally, the ability for individual devices to negotiate the exact amount of power they need at any time improves system efficiency.
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USB power delivery design
When considering a USB-based design that makes the most of the technology’s power supply capabilities, it’s worth taking a moment to understand how it handles data and power transfer. This has changed considerably from the initial implementation whereby a PC supplied power to a peripheral and data was exchanged both ways.
In today’s implementations, a Downstream Facing Port (DFP) sends data, can source VBUS power and is typically a host or a hub; an Upstream Facing Port (UFP) receives data, sinks (consumes) VBUS power and connects to a host (for example, a display); and a Dual-Role-Data (DRD) port can act as either a DFP or a UFP. In the case of DRD, the port’s role is determined by whether it acts as a power source (DFP) or sink (UFP) at start-up, but its function can be dynamically changed during operation if required. A DRD port is typically used in a smartphone or tablet computer.
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When considering power flow, ports can also take on a Dual-Role-Power (DRP) configuration. For example, a portable computer may feature a DRP port that’s used to charge its battery, but may later be used to power an external device such as a hard disk drive. Life gets just a little more complex for the designer here because there are subclasses of a DRP, namely a sourcing device and a sinking host. A sourcing device can supply power, but is unable to act as a DFP. Similarly, a sinking device can receive power, but can’t act as a UFP.
------------------------------------------------
If both ports are DRP capable, the outcome of the connection can be influenced by two optional features: “Try.SRC” (which sets the port as a DFP) and “Try.SNK” (UFP). Such settings can be quite important depending on the application. For example, it would make little sense for a smartphone to start charging a portable computer.
https://www.digikey.hk/en/articles/techzone/2017/mar/designing-in-usb-type-c-and-using-power-delivery-for-rapid-charging
For the designer, other notable aspects of the USB PD Specification are the ability of host and peripheral to “negotiate” voltage and current levels using VBUS pins (i.e. without relying on data lines) and the ability to deliver power in either direction without recourse to connector switching. This capability allows, for example, a display connected to mains power to be used to charge a laptop while simultaneously presenting information from the portable computer. Finally, the ability for individual devices to negotiate the exact amount of power they need at any time improves system efficiency.
------------------------------------------------
USB power delivery design
When considering a USB-based design that makes the most of the technology’s power supply capabilities, it’s worth taking a moment to understand how it handles data and power transfer. This has changed considerably from the initial implementation whereby a PC supplied power to a peripheral and data was exchanged both ways.
In today’s implementations, a Downstream Facing Port (DFP) sends data, can source VBUS power and is typically a host or a hub; an Upstream Facing Port (UFP) receives data, sinks (consumes) VBUS power and connects to a host (for example, a display); and a Dual-Role-Data (DRD) port can act as either a DFP or a UFP. In the case of DRD, the port’s role is determined by whether it acts as a power source (DFP) or sink (UFP) at start-up, but its function can be dynamically changed during operation if required. A DRD port is typically used in a smartphone or tablet computer.
------------------------------------------------
When considering power flow, ports can also take on a Dual-Role-Power (DRP) configuration. For example, a portable computer may feature a DRP port that’s used to charge its battery, but may later be used to power an external device such as a hard disk drive. Life gets just a little more complex for the designer here because there are subclasses of a DRP, namely a sourcing device and a sinking host. A sourcing device can supply power, but is unable to act as a DFP. Similarly, a sinking device can receive power, but can’t act as a UFP.
------------------------------------------------
If both ports are DRP capable, the outcome of the connection can be influenced by two optional features: “Try.SRC” (which sets the port as a DFP) and “Try.SNK” (UFP). Such settings can be quite important depending on the application. For example, it would make little sense for a smartphone to start charging a portable computer.
坦巴真係
連electric engineering 都識
連electric engineering 都識
用MacBook一次過惡補埋電子知識
有冇人覺得外觀上追求完美主義搞到散熱好差？我買咗13寸corei5都覺得好熱，佢機底一個散熱孔都冇，得關節位有，死得啦，要嚮冷氣出風口用先掂
仲有 keyboard 每粒之間散熱
Mac 不嬲散熱差
Mac 不嬲散熱差
邊鳩度識
我本身心諗，無理由咁大個USB-IF standards body可以咁on9，Switch叉MBP咁白痴既情況都整得出，所以以為自己一定有野誤解左，同埋純粹因為好奇，查緊type-C尿袋behaviour嗰時越查越入
到目前為止，我個理解結論係: 原來engineer真係可以好撚on9，千祈唔好俾決策權呢班友
我本身心諗，無理由咁大個USB-IF standards body可以咁on9，Switch叉MBP咁白痴既情況都整得出，所以以為自己一定有野誤解左，同埋純粹因為好奇，查緊type-C尿袋behaviour嗰時越查越入
到目前為止，我個理解結論係: 原來engineer真係可以好撚on9，千祈唔好俾決策權呢班友
in 同out 一個樣既問題
呢個咁撚亂既表係概括大部分type-C device應該行既mode
留意laptop係出現左兩次
究竟一部同時可以type-C PD in同out既laptop，包括MBP，係點樣決定企響呢個表中間做DRP定係右面做sink，係driver同circuitry兩樣都要俾option
而究竟呢個option係唔係user accessible，經唔經security enclave，權限，有無GUI去control等等... Apple似乎未有定案
關於type-C好多野都係一舊雲咁亂撚咁黎
其實係apple ge 問題定係intel ge 問題
想話買個keyboard，官方好定第三方好？我見官方網有中文keyboard，但apple shop係冇，咩事
第三方有咩好嘢選擇？
第三方有咩好嘢選擇？
Store不嬲得base model 