參數(shù)資料
型號(hào): EM6617VVVST11A
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 0.032768 MHz, RISC MICROCONTROLLER
封裝: STICKY TAPE
文件頁(yè)數(shù): 42/66頁(yè)
文件大?。?/td> 759K
代理商: EM6617VVVST11A
EM6617-1
EM Microelectronic-Marin SA , 3/99 Rev. B/258
42
15. Strobe Output
The Strobe output is used to indicate either the EM6617-1 reset condition, a write operation on port B (WritePB)
or the sleep mode. The selection is done in register
RegLcdCntl1
. Per default, the reset condition is output on
the Strobe terminal.
For a port B write operation the strobe signal goes high for half a system clock period. Data can be latched on
the falling edge of the strobe signal. This function is used to indicate when data on port B output terminals is
changing.
The reset signal on the Strobe output is a copy of the internal CPU reset signal. The Strobe pin remains active
high as long as the CPU gets the reset.
Both the reset condition and the port B write operation can be output simultaneously on the Strobe pin.
The strobe output select latches are reset by initial power on reset only.
Table 13.1.1. Strobe Output Selection
StrobeOutSel1
StrobeOutSel0
Strobe
Terminal
Output
System
Reset
System Reset
and
WritePB
WritePB
Sleep
0
0
0
1
1
1
0
1
15.1 Strobe register
Table 15.1.1 register OPTPCandStr
Bit
Name
Power on
value
0
0
0
0
R/W
Description
3
2
1
0
NoPdPC
NchOpDPC
StrobeOutSel1
StrobeOutSel0
R/W
R/W
R/W
R/W
no pull-down on PortC
N-Channel Open Drain on PortC
Strobe output selection
Strobe output selection
Default : System reset on STROBE output
Figure 31 . Strobe Output
Reset, WritePB
StrobeOutSel1
StrobeOutSel0
Sleep
WritePB
Reset
3
0
1
2
1
0
Terminal
Strobe
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