參數(shù)資料
型號(hào)： HD404628R
廠商： Hitachi,Ltd.
英文描述： AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
中文描述： 由于微機(jī)安裝有雙音多頻發(fā)電機(jī)斷路器（微計(jì)算機(jī)帶雙音多頻發(fā)生器電路）
文件頁數(shù)： 44/155頁
文件大?。?/td> 549K
代理商： HD404628R
HD404629R Series
44
Internal Oscillator Circuit
A block diagram of the clock generation circuit is shown in figure 26. As shown in table 22, a ceramic
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 0 and 1 (SSR1) of the system
clock select register (SSR: $029) must be set according to the frequency of the oscillator connected to
OSC
1
and OSC
2
(figure 27).
Note:
If the system clock select register (SSR: $029) setting does not match the oscillator frequency,
DTMF generator and subsystems using the 32.768-kHz oscillation will malfunction.
OSC
2
OSC
1
X1
X2
System
clock
oscillator
Sub-
system
clock
oscillator
1/4
division
circuit
Timing
generation
circuit
System
clock
selection
circuit
CPU with ROM,
RAM, registers,
flags, and I/O
Internal
Peripheral
module
interrupts
(other than timer A)
Timer A
interrupt
Clock
Time-base
clock
selection
circuit
1/8 or 1/4
division
circuit
Timing
generator
circuit
Timing
generation
circuit
1/8
division
circuit
f
W
t
Wcyc
f
SUB
t
subcyc
LSON
TMA3 bit
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 26 Clock Generation Circuit
相關(guān)PDF資料
PDF描述
HD4074629 AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD404629R AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD404638R 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
HD40A4638R 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
HD40A4639R 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404628RFS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404628RH 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a DTMF Generator Circuit
HD404628RTF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404628TF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404629FS 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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