參數(shù)資料
型號(hào): ML87V3104TB
廠商: OKI ELECTRIC INDUSTRY CO LTD
元件分類: 顯示控制器
英文描述: 640 X 240 PIXELS CRT OR FLAT PNL GRPH DSPL CTLR, PQFP100
封裝: 14 X 14 MM, 0.50 MM PITCH, PLASTIC, TQFP-100
文件頁數(shù): 19/69頁
文件大?。?/td> 444K
代理商: ML87V3104TB
FEDL87V3104-03
OKI Semiconductor
ML87V3104
26/69
4. General Purpose I/O Port
The ML87V3104 has two general purpose ports (PORT1, PORT0). It is possible to specify the input/output
directions independently for these ports. The output level of the output port can be set by writing data in the data
register. Further, the input level of the input port can be read out from the data register. When set as an input port,
writing to the data register will not be valid.
Control registers:
PTDDIR
[#0Eh; bit1-0]:
General purpose port input/output mode (‘0’: output, ‘1’: input)
PTDREG [#0Fh; bit1-0]:
General purpose port data register (‘0’: L level, ‘1’: H level)
Bit 1 corresponds to PORT1 and bit 0 corresponds to PORT0.
PTDDIR[n]
PORTn
0
Output
PTDREG[n]
→ PORTn
1
Input
PTDREG[n]
← PORTn
Pin 59
PTDREG[0]
PTDDIR[0]
PORT0
Host Data
Pin 60
PTDREG[1]
PTDDIR[1]
PORT1
Host Data
Fig. F4.1 General purpose ports
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