參數(shù)資料
型號(hào)： HD4074654
廠商： Hitachi,Ltd.
英文描述： 4-Bit Single-Chip Microcomputer
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 81/109頁(yè)
文件大小： 430K
代理商： HD4074654
HD404654 Series
81
System Clock Select Registers 1 and 2 (SSR1: $029, SSR2: $02A):
Four-bit write-only registers.
These registers must be set to the value specified in figures 67 and 68 depending on the frequency of the
oscillator connected to the OSC
1
and OSC
2
pins. Note that if the combination of the oscillation frequency
and the values in these registers is different from that specified in figures 67 and 68, the DTMF output
frequencies will differ from the correct frequencies as listed in Table 26.
Bit
Initial value
Read/Write
Bit name
3
—
—
Not used
2
—
—
Not used
0
0
W
SSR10
1
0
W
SSR11
System clock select register 1 (SSR1: $029)
SSR22
0
0
0
0
1
400 kHz
800 kHz
2 MHz
4 MHz
3.58 MHz
SSR11
0
0
1
1
SSR10
0
1
0
1
System clock
selection
: Don’t care
×
×
×
Figure 67 System Clock Select Register 1 (SSR1)
Bit
Initial value
Read/Write
Bit name
3
—
—
Not used
2
0
W
SSR22
0
—
—
Not used
1
—
—
Not used
SSR22
0
Serial clock select register 2 (SSR2: $02A)
System clock selection
Selected from 400 kHz, 800 kHz,
2 MHz, 4 MHz
*
1
3.58 MHz
Note:
*
Refer to system clock select register 1 (SSR1).
Figure 68 System Clock Select Register 2 (SSR2)
相關(guān)PDF資料
PDF描述
HD4074654H 4-Bit Single-Chip Microcomputer
HD4074654S 4-Bit Single-Chip Microcomputer
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD4074654H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD4074654S 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD4074678H 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074709C 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074709FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
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