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參數資料
| 型號： | CDP1878C |
| 廠商： | Intersil Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | CMOS Dual Counter-Timer(CMOS 雙路計時器／定時器) |
| 中文描述： | CMOS雙反定時器（的CMOS雙路計時器/定時器） |
| 文件頁數： | 1/13頁 |
| 文件大小： | 61K |
| 代理商： | CDP1878C |
4-91
March 1997
Features
Compatible with General Purpose and CDP1800
Series Microprocessor Systems
Two 16-Bit Down Counters and Two 8-Bit Control
Registers
5 Modes Including a Versatile Variable-Duty Cycle
Mode
Programmable Gate-Level Select
Two-Complemented Output Pins for Each Counter-
Timer
Software-Controlled Interrupt Output
Addressable in Memory Space or CDP1800-Series I/O
Space
Description
The CDP1878C is a dual counter-timer consisting of two 16-
bit programmable down counters that are independently
controlled by separate control registers. The value in the reg-
isters determine the mode of operation and control func-
tions. Counters and registers are directly addressable in
memory space by any general industry type microproces-
sors, in addition to input/output mapping with the CDP1800
series microprocessors.
Each counter-timer can be configured in five modes with the
additional flexibility of gate-level control. The control regis-
ters in addition to mode formatting, allow software start and
stop, interrupt enable, and an optional read control that
allows a stable readout from the counters. Each counter-
timer has software control of a common interrupt output with
an interrupt status register indicating which counter-timer
has timed out.
In addition to the interrupt output, true and complemented
outputs are provided for each counter-timer for control of
peripheral devices.
This type is supplied in 28-lead dual-in-line ceramic pack-
ages (D suffix), and 28-lead dual-in-line plastic packages (E
suffix).
Pinout
CDP1878C
(DIP)
TOP VIEW
Ordering Information
PART
NUMBER
TEMP. RANGE
PACKAGE
PKG. NO.
CDP1878CE
-40
o
C to +85
o
C PDIP
E28.6
CDP1878CD
-40
o
C to +85
o
C SBDIP
N28.6
INT
TAO
TAO
TAG
TACL
RD
IO/MEM
TPB/WR
TPA
CS
A0
A1
A2
V
SS
V
DD
DB7
DB6
DB5
DB4
DB3
DB1
TBO
TBO
TBG
TBCL
RESET
DB2
DB0
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TABLE 1. MODE DESCRIPTION
MODE
FUNCTION
APPLICATION
1 Timeout
Outputs change when clock
decrements counter to “0”
Event counter
2 Timeout
Strobe
One clockwide output pulse
when clock decrements
counter to “0”
Trigger pulse
3 Gate-Con-
trolled One
Shot
Outputs change when clock
decrements counter to “0”.
Retriggerable
Time-delay
generation
4 Rate Generator Repetitive clockwide output
pulse
Time-base
generator
5 Variable-Duty
Cycle
Repetitive output with
programmed duty cycle
Motor control
File Number
1341.2
CDP1878C
CMOS Dual Counter-Timer
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
Intersil Corporation 1999
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相關代理商/技術參數 |
參數描述 |
|---|---|
| CDP1878CD | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Dual Counter-Timer |
| CDP1878CE | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Dual Counter-Timer |
| CDP1878D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| CDP1878E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| CDP1879 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Real-Time Clock |
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