參數(shù)資料
型號(hào): HD4074849
廠商: Hitachi,Ltd.
元件分類: 其它接口
英文描述: TERMINAL
中文描述: IGBT模塊
文件頁(yè)數(shù): 40/125頁(yè)
文件大?。?/td> 471K
代理商: HD4074849
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HD404849 Series
40
Internal Oscillator Circuit
A block diagram of the clock generation circuit is shown in figure 25. As shown in table 22, a ceramic or
crystal oscillator can be connected to OSC
1
and OSC
2
, and a 32.768-kHz oscillator can be connected to X1
and X2. The system oscillator can also be operated by an external clock. Bit 1 (SSR1) of the system clock
select register (SSR: $029) must be set according to the fre quency of the oscillator connected to OSC
1
and
OSC
2
(figure 26).
Note:
If the system clock select register (SSR: $029) setting does not match the oscillator frequency,
subsystems using the 32.768-kHz oscillation will malfunction.
OSC
2
OSC
1
X1
X2
System
oscillator
Sub-
system
oscillator
1/4
division
circuit
Timing
generator
circuit
System
clock
selection
CPU with ROM,
RAM, registers,
flags, and I/O
Peripheral
function
interrupt
Time-base
interrupt
Time-base
clock
selection
1/8 or 1/4
division
circuit
Timing
generator
circuit
Timing
generator
circuit
1/8
division
circuit
f
W
t
Wcyc
f
SUB
t
subcyc
LSON
TMA3
f
cyc
t
cyc
f
OSC
f
X
CPU
PER
CLK
Note:
*
*
1/8 or 1/4 division ratio can be selected by setting bit 2 of the system
clock select register (SSR: $029).
Figure 25 Clock Generation Circuit
相關(guān)PDF資料
PDF描述
HD4074849FS CONTACT
HD4074849H CONTACT
HD4074849TF TERMINAL
HD404864 Low-Voltage AS Microcomputers with On-Chip LCD Circuit(片上LCD電路的低壓微計(jì)算機(jī))
HD4074869 Low-Voltage AS Microcomputers with On-Chip LCD Circuit(片上LCD電路的低壓微計(jì)算機(jī))
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD4074849FS 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD4074849H 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD4074849TF 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer
HD4074889 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Low-Voltage AS Microcomputers with On-Chip LCD Circuit
HD4074889H 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Low-Voltage AS Microcomputers with On-Chip LCD Circuit