參數(shù)資料
型號: HD4074329
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
中文描述: 4位HMCS400系列微電腦(4位單片微計算機(jī))
文件頁數(shù): 62/94頁
文件大小: 573K
代理商: HD4074329
HD404328 Series
62
Table 29
LCD Control Register
LCR
LCR
LCR
Bit 2
Display in Watch Mode or
Subactive Mode
Bit 1
Power Switch On/Off
Bit 0
Blank/Display
0
Off
0
Off
0
Blank
1
Note:
On
1
On
1
Display
When using an LCD in watch mode or subactive mode, use the divided output of a 32-kHz oscillator
as the LCD clock and set bit 2 of the LCR to 1. If using the divided output of the system clock as the
LCD clock, always set bit 2 of the LCR to 0.
LCD Duty Cycle/Clock Control Register (LMR: $014):
Four-bit write-only register which selects the
display duty cycle and LCD clock source, as shown in table 30. The dependence of frame frequency on
duty cycle is shown in table 31.
Table 30
LCD Duty Cycle/Clock Control Register
LMR
Bit 3
Bit 2
Bit 1
Bit 0
Duty Selection/Input Clock Selection
0
0
1/4 duty cycle
1
1/3 duty cycle
1
0
1/2 duty cycle
1
Static
0
0
CL0 (32.768/64 kHz when using a 32.768-kHz oscillator)
1
CL1 (f
cyc
/256)
CL2 (f
cyc
/2048)
CL3 (refer to table 31)
1
0
1
Note:
f
cyc
is the divided system clock output.
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