參數(shù)資料
型號(hào): UPSD3233BV
廠商: 意法半導(dǎo)體
英文描述: Flash Programmable System Devices with 8032 Microcontroller Core
中文描述: 閃存可編程系統(tǒng)設(shè)備與8032微控制器內(nèi)核
文件頁數(shù): 80/170頁
文件大小: 2717K
代理商: UPSD3233BV
uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV
80/170
DDC1 Protocol
DDC1 is primitive and a point to point interface.
The monitor is always put at “Transmit only” mode.
In the initialization phase, 9 clock cycles on V
CLK
pin will be given for the internal synchronization.
During this period, the SDA pin will be kept at high
impedance state.
If DDC1 hardware mode is used, the following pro-
cedure is recommended to proceed DDC1 opera-
tion.
1.
Reset DDC1 enable (by default, DDC1 enable
is cleared as LOW after Power-on Reset).
2.
Set SWENB as high (the default value is zero.)
3.
Depending on the data size of EDID data, set
EX_DAT as LOW (128 bytes) or HIGH (256
bytes).
4.
By using bulky moving commands (DDCADR,
RAMBUF involved) to move the entire EDID
data to RAM buffer.
5.
Reset SWENB to LOW.
6.
Reset DDCADR to 00h.
7.
Set DDC1 enable as HIGH.
In case SWENB is set as high, interrupt service
routine is finished within 133 machine cycle in
40MHz System clock.
The maximum V
SYNC
(V
CLK
) frequency is 25Khz
(40μs). And the 9th clock of V
SYNC
(V
CLK
) is inter-
rupt period.
So the machine cycle be needed is calculated as
below. For example,
When 40MHz system clock, 40μs = 133 x (25ns x
12); 133 machine cycle.
12MHz system clock, 40μs = 40 x (83.3ns x 12);
40 machine cycle.
8MHz system clock, 40μs = 26 x (125ns x 12); 26
machine cycle.
Note:
If EX_DAT equals to LOW, it is meant the
lower part is occupied by DDC1 operation and the
upper part is still free to the system. Nevertheless,
the effect of the post increment just applies to the
part related to DDC1 operation. In other words, the
system program is still able to address the loca-
tions from 128 to 255 in the RAM buffer through
MOVX command but without the facility of the post
increment. For example, the case of accessing
200 of the RAM Buffer:
MOV R0, #200, and
MOVX A, @R0
Figure 42. Transmission Protocol in the DDC1 Interface
AI06652
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
B
tSU(DDC1)
tDOV
Hi-Z
SC
VCLK
DDC1INT
DDC1EN
SD
tH(VCLK)
tL(VCLK)
Max=40us
B
B
B
B
B
B
B
B
HiZ
相關(guān)PDF資料
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uPSD3233BV-40T6T Flash Programmable System Devices with 8032 Microcontroller Core
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uPSD3233BV-40U6T Flash Programmable System Devices with 8032 Microcontroller Core
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPSD3233BV-24T1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
UPSD3233BV-24T1T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
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UPSD3233BV-24T6T 功能描述:8位微控制器 -MCU Flash Programmable System Devices RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
UPSD3233BV-24U1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core