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參數(shù)資料
| 型號： | MC9328MX21SVMR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 46/88頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MPU I.MX21S 289-MAPBGA |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 系列： | i.MX21 |
| 核心處理器： | ARM9 |
| 芯體尺寸： | 32-位 |
| 速度： | 266MHz |
| 連通性： | 1 線，EBI/EMI，I²C，IrDA，MMC，智能卡，SPI，SSI，UART/USART，USB OTG |
| 外圍設(shè)備： | DMA，I²S，LCD，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 192 |
| 程序存儲器類型： | ROMless |
| 電壓 - 電源 (Vcc/Vdd)： | 1.45 V ~ 3.3 V |
| 振蕩器型： | 外部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 289-LFBGA |
| 包裝： | 帶卷 (TR) |
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MC9328MX21S Technical Data, Rev. 1.3
50
Freescale Semiconductor
Specifications
control register PST. When the PST bit is set to a one, it means that a DS2502 is present; if the bit is set to
a zero, then no device was found.
3.16.2
Write 0
The Write 0 function simply writes a zero bit to the DS2502. The sequence takes 117 us. The one-wire bus
is held low for 100us.
Figure 39. Write 0 Timing
The Write 0 pulse sequence is initiated when the WR0 control bit register is set. When the write is
complete, the WR0 register will be auto cleared.
3.16.3
Write 1/Read Data
The Write 1 and Read timing is identical. The time slot is first driven low. According to the DS2502
documentation, the DS2502 has a delay circuit which is used to synchronize the DS2502 with the bus
master (one-wire). This delay circuit is triggered by the falling edge of the data line and is used to decide
when the DS2502 should sample the line. In the case of a write 1 or read 1, after a delay, a 1 will be
transmitted / received. When a read 0 slot is issued, the delay circuit will hold the data line low to override
the 1 generated by the bus master (one-wire).
For the Write 1 or Read, the control register WR1/RD is set and auto-cleared when the sequence has been
completed. After a Read, the control register RDST bit is set to the value of the read.
Figure 40. Write 1 Timing
100us
one-wire
17us
BUS
Write 0 Slot 128us
AutoClear WR0
Set WR0
5us
Write “1” Slot 117us
Set WR1/RD
Auto Clear WR1/R
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
i.MX21
Product
Family
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC9328MX21VG | 制造商:Rochester Electronics LLC 功能描述:APPLICATIONS PROCESSOR - Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC9328MX21VH | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:i.MX family of microprocessors |
| MC9328MX21VK | 功能描述:處理器 - 專門應(yīng)用 DB I.MX21 PB-FR RoHS:否 制造商:Freescale Semiconductor 類型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:1 GHz 指令/數(shù)據(jù)緩存: 數(shù)據(jù) RAM 大小:128 KB 數(shù)據(jù) ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MAPBGA-432 |
| MC9328MX21VK | 制造商:Freescale Semiconductor 功能描述:Microprocessor |
| MC9328MX21VKR2 | 功能描述:處理器 - 專門應(yīng)用 DB I.MX21 PB-FR RoHS:否 制造商:Freescale Semiconductor 類型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:1 GHz 指令/數(shù)據(jù)緩存: 數(shù)據(jù) RAM 大小:128 KB 數(shù)據(jù) ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MAPBGA-432 |
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