參數(shù)資料
型號: UPD4990AC-A
元件分類: 時鐘/數(shù)據(jù)恢復(fù)及定時提取
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDIP14
封裝: DIP-14
文件頁數(shù): 32/51頁
文件大小: 211K
代理商: UPD4990AC-A
33
CHAPTER 6 APPLICATION CIRCUIT & SOFTWARE
This section is shown some application circuits and softwares for some CPUs.
6.1
COM-75X (4 BIT SINGLE CHIP CPU)
Fig. 6-1 is a example of circuit and List 6-1 is a example of software.
Fig. 6-1 Application Circuit for
COM-75X
C0
C1
C2
OUT ENBL
DATA IN
CLK
DATA OUT
STB
SO
SCK
SI
P30
VSS
PD4990A
VSS
COM-75X
10 k
× 3
VDD
VDD1
(System power supply)
+5 V
VDD2
(Back up power supply)
System ON
OFF
: 5 V/
: 2 to 5 V
CS
Power
Fail
XTAL
20 pF
30 pF
TP
10 k
+5 V
TP OUT
X: 32.768 kHz
10 k
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