參數(shù)資料
型號: CDP1805ACE
廠商: INTERSIL CORP
元件分類: 微控制器/微處理器
英文描述: CMOS 8-Bit Microprocessor with On-Chip RAM and Counter/Timer
中文描述: 8-BIT, 5 MHz, MICROPROCESSOR, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 14/30頁
文件大?。?/td> 301K
代理商: CDP1805ACE
14
Because of the Schmitt Trigger input, an RC oscillator can
be used as shown in Figure 9. The frequency is approxi-
mately 1/RC (see Figure 10).
STPC
R
÷
32
TPA
STM
SPMI
INH
OUT
8-BIT
DOWN
COUNTER
LOAD
READ
SCMI
SPM2
SCM2
DTC
GEC
COUNTER
UNDERFLOW
ETQ
LDC
TO INTERRUPT LATCH
C
Q FF
D
Q
Q
Q OUTPUT
EF2
EF1
FIGURE 7. TIMER/COUNTER DIAGRAM
Pin numbers refer to 40 pin DIP.
FIGURE 8. TYPICAL 5MHz CRYSTAL OSCILLATOR
Pin numbers refer to 40 pin DIP.
FIGURE 9. RC NETWORK FOR OSCILLATOR
1
39 XTAL
C
IN
XTAL
5MHz PARALLEL
RESONANT
CRYSTAL
15pF
C
27pF
1M
RF
CLOCK
1
39 XTAL
C
R
CLOCK
FIGURE 10. NOMINAL COMPONENT VALUES AS A FUNCTION
OF FREQUENCY FOR THE RC OSCILLATOR
CONTROL MODES
CLEAR
WAIT
MODE
L
L
Not Allowed
L
H
Reset
H
L
Pause
H
H
Run
10M
1M
100K
10K
1
1M
10
100
1K
10K
100K
R
)
FREQUENCY (Hz)
V
DD
= 5V AT 25
o
C
C=1
μ
pF
C=01
μ
F
C=001
F
C=1000pF
CDP1805AC, CDP1806AC
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CDP1806ACE CMOS 8-Bit Microprocessor with On-Chip RAM and Counter/Timer
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