參數(shù)資料
型號： HD404339FS
廠商： Hitachi,Ltd.
英文描述： 4-bit HMCS400-Series microcomputer with large-capacity memory
中文描述： 4位HMCS400系列的大容量存儲器微機(jī)
文件頁數(shù)： 26/78頁
文件大小： 337K
代理商： HD404339FS
HD404339 Series
26
Oscillator Circuit
Figure 18 shows a block diagram of the clock generation circuit. The system clock frequency of the
oscillator connected to OSC
1
and OSC
2
can be selected by system clock selection registers 1 and 2 (SSR1,
2: $027, $028) as shown in figures 20 and 21.
The system clock division ratio can be set by software to be 1/4, 1/8, 1/16, or 1/32. The subsystem clock
division ratio can be set by software to be 1/4 or 1/8.
OSC
2
OSC
1
X1
X2
System
oscillator
Sub-
system
oscillator
1/4, 1/8,
1/16, or
1/32
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
Notes: 1.
2.
The system clock division ratio can be selected by setting bit 1 or 0 of the system
clock select register 2 (SSR2: $028).
The system clock division ratio can be selected by setting bit 2 of the system
clock select register 1 (SSR1: $027).
*
1
*
2
Figure 18 Clock Generation Circuit
相關(guān)PDF資料
PDF描述
HD4074339FS 4-bit HMCS400-Series microcomputer with large-capacity memory
HD4074339 4-bit HMCS400-Series microcomputer with large-capacity memory
HD4074339S 4-bit HMCS400-Series microcomputer with large-capacity memory
HD4043312FS 4-bit HMCS400-Series microcomputer with large-capacity memory
HD4043312S 4-bit HMCS400-Series microcomputer with large-capacity memory
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404339S 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit HMCS400-Series microcomputer with large-capacity memory
HD404339SERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HD404341FP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404341FT 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404341R 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit microcomputers
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