參數(shù)資料
型號(hào): UPD4990AC-A
元件分類: 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDIP14
封裝: DIP-14
文件頁數(shù): 50/51頁
文件大?。?/td> 211K
代理商: UPD4990AC-A
3
CHAPTER
1
INTRODUCTION
1.4
BLOCK
DIAGRAM
CLK
OE
DATA
IN
COMMAND
Register
CS
CLK
Select signal
generator circuit
C3 C2 C1 C0
PS
RH
CLK
48 Bit Shift Register
YEAR
MONTH
D/W
DAY
HOUR
MIN
SEC
MPX
1/2
15
OSC
XTAL
DATA OUT
N-ch
OPEN DRAIN
1 Hz
Time Counter
15 Stage Binary Divider
DATA
SELECTOR
C3'
C2'
C1'
C0'
C2
C1
C0
CS
STB
DECODER
TEST
STOP
1/2
6
SEC
1 Hz
64 Hz
RESET
MPX
TP
N-ch
OPEN DRAIN
MPX
PS
D/W
CS
TP
RH
Multiplexer
Preset
Day of the Week
Chip Select
Timing Pulse
Register Hold
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