參數(shù)資料
型號(hào)： EM6821TQ52B
英文描述： Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0&degC to 70°C; Package: 8-EPSOIC
中文描述： 微控制器
文件頁(yè)數(shù)： 16/69頁(yè)
文件大小： 852K
代理商： EM6821TQ52B
EM6821
10/01, Revision A/386
Copyright
2001, EM Microelectronic-Marin SA
23
www.emmicroelectronic.com
6.6.5 Detailed Functional Description
Master or Slave mode is selected in the control register RegSCntl1.
In Slave mode, the serial clock comes from an external device and is input via the PSP[3] terminal as a
synchronous clock (SCLKIn) to the serial interface. The serial clock is ignored as long as the Start bit is not set.
After setting Start, only the eight following active edges of the serial clock input PSP[3] are used to shift the
serial data in and out. After eight serial clock edges the Start bit is reset. The PSP[1] terminal is a copy of the
(Start OR Status) bit values, it can be used to indicate to the external master, that the interface is ready to
operate or it can be used as a chip select signal in case of an external slave.
In Master mode, the synchronous serial clock is generated internally from the system clock. The frequency is
selected from one out of three sources ( MS0 and MS1 bits in RegSCntl1) . The serial shifting clock is only
generated during Start = high and is output to the SCLK terminal as the Master Clock (SCLKOut). When Start
is low, the serial clock output on PSP[3] is 0.
An interrupt request IRQSerial is generated after the eight shift operations are done. This signal is set by the
last negative edge of the serial interface clock on PSP[3] (master or slave mode) and is reset to 0 by the next
write of Start or by any reset. This interrupt can be masked with register RegIRQMask3. For more details
about the interrupt handling see chapter 10.
Serial data input on PSP[0] is sampled by the positive or negative serial shifting clock edge, as selected by the
Control Register POSnNeg bit. Serial data input is shifted in LSB first or MSB first, as selected by the Control
Register MSBnLSB bit.
6.6.6 Output Modes
Serial data output is given out in two different ways (Refer also to
Figure 16 and Figure 17).
- OM[1] = 1, OM[0] = 0 :
The serial output data is generated with the
selected shift register clock (POSnNeg). The
first data bit is available directly after the Start
bit is set.
-OM[1] = 0, OM[0] = 1 :
The serial output data is re-synchronized by
the positive serial interface clock edge,
independent of the selected clock shifting
edge. The first data bit is available on the first
positive serial interface clock edge after
Start=‘1’.
Table 6.6.6 Output Mode Selection in RegSCntl2
OM[1]
OM[0]
Output mode
Description
0
Tristate
Output disable (tristate on PSP[3:0])
01
Serial-
Synchronized
Re-synchronized positive edge data shift out
1
0
Serial-Direct
Direct shift pos. or neg. edge data out
1
Parallel
Parallel port SP output
Tristate output is selected by default.
Figure 16. Direct or Re-Synchronized Output
bit4
bit5
bit6
bit7
bit0
bit1
bit2
bit3
SIN
SOUT
+ve/-ve Edge
Direct
Shift Out
bit3
bit2
bit1
bit0
bit7
bit6
bit5
bit4
M
U
X
bit4
bit5
bit6
bit7
bit0
bit[n
]
bit1
bit2
bit3
+ve Edge clock
SIN
SOUT
+ve/-ve Edge
Re-synchronised
shift out
M
U
X
bit3
bit2
bit1
bit0
bit7
bit6
bit5
bit4
MSBnLSB
相關(guān)PDF資料
PDF描述
EM6821TQ52D Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-SOIC
EM73MA89B Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-EPSOIC T&R
EM78156E Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0&degC to 70°C; Package: 14-SOIC
EM78458 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0&degC to 70°C; Package: 16-QFN
EM78459 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 14-SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EM685 制造商:Distributed By MCM 功能描述:UTILITY MOTOR
EM68C16CWVB-25H 制造商:Etron 功能描述:DDRII SDRAM,1Gb,64M*16,Pb & Halogen free
EM6A8160TSA 制造商:ETRON 制造商全稱(chēng):ETRON 功能描述:4M x 16 DDR Synchronous DRAM (SDRAM)
EM6A8160TSA-5G 制造商:ETRON 制造商全稱(chēng):ETRON 功能描述:4M x 16 DDR Synchronous DRAM (SDRAM)
EM6A9160 制造商:ETRON 制造商全稱(chēng):ETRON 功能描述:8M x 16 DDR Synchronous DRAM (SDRAM)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*