參數(shù)資料
型號(hào)： UPD4992GS
廠商： NEC Corp.
英文描述： 8-Bit Parallel I/O Calendar Clock
中文描述： 8位并行I / O時(shí)鐘日歷
文件頁(yè)數(shù)： 6/16頁(yè)
文件大小： 101K
代理商： UPD4992GS
μ
PD4992
6
PIN FUNCTION
Pin symbol
Pin name
Pin number
Function
CS
1
Chip select input
2
Internal register can be accessed when CS
1
= L
and CS
2
= H
CS
2
Chip select input
17
WR
Write signal input
3
Writes the contents of data bus to the register
selected by address input at the rising edge
RD
Read signal input
7
Outputs the contents of the register selected by
address input to the data bus at the rising edge
D
0
to D
7
Data input/output
8, 9, 11 to 16
Data input/output bus
A
0
to A
2
Address input
4 to 6
Address input to select internal register
TP
Timing pulse output
1
Interval signal and timing pulse output (N ch open
drain output)
X
IN
Crystal resonator connection pin
19
Crystal resonator and capacitor are connected to
these pins.
X
OUT
Crystal resonator connection pin
18
V
DD
Power supply pin
20
2.4 V to 5.5 V
V
SS
GND
10
Connect to GND
External components (crystal resonator, capacitors) must be located as close as the IC, and separated as far as
from high speed clock wiring.
X
V
DD
X
IN
X
OUT
C
2
C
1
X: 32.768 kHz
C
1
, C
2
: 10 to 30 pF
5 V or 0 V
相關(guān)PDF資料
PDF描述
UPD4992GS-T1 8-Bit Parallel I/O Calendar Clock
UPD4992GS-T2 8-Bit Parallel I/O Calendar Clock
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