参数资料
型号: IS82C54-1096
厂商: Intersil
文件页数: 5/22页
文件大小: 0K
描述: IC OSC PROG TIMER 10MHZ 28PLCC
标准包装: 750
类型: 可编程计时器
频率: 10MHz
电源电压: 4.5 V ~ 5.5 V
电流 - 电源: 10mA
工作温度: -40°C ~ 85°C
封装/外壳: 28-LCC(J 形引线)
包装: 管件
供应商设备封装: 28-PLCC(11.51x11.51)
安装类型: 表面贴装
13
82C54
MODE 2: RATE GENERATOR
This Mode functions like a divide-by-N counter. It is typically
used to generate a Real Time Clock Interrupt. OUT will
initially be high. When the initial count has decremented to 1,
OUT goes low for one CLK pulse. OUT then goes high
again, the Counter reloads the initial count and the process
is repeated. Mode 2 is periodic; the same sequence is
repeated indefinitely. For an initial count of N, the sequence
repeats every N CLK cycles.
GATE = 1 enables counting; GATE = 0 disables counting. If
GATE goes low during an output pulse, OUT is set high
immediately. A trigger reloads the Counter with the initial
count on the next CLK pulse; OUT goes low N CLK pulses
after the trigger. Thus the GATE input can be used to
synchronize the Counter.
After writing a Control Word and initial count, the Counter will
be loaded on the next CLK pulse. OUT goes low N CLK
pulses after the initial count is written. This allows the
Counter to be synchronized by software also.
Writing a new count while counting does not affect the current
counting sequence. If a trigger is received after writing a new
count but before the end of the current period, the Counter will
be loaded with the new count on the next CLK pulse and
counting will continue from the end of the current counting
cycle.
MODE 3: SQUARE WAVE MODE
Mode 3 is typically used for Baud rate generation. Mode 3 is
similar to Mode 2 except for the duty cycle of OUT. OUT will
initially be high. When half the initial count has expired, OUT
goes low for the remainder of the count. Mode 3 is periodic;
the sequence above is repeated indefinitely. An initial count
of N results in a square wave with a period of N CLK cycles.
GATE = 1 enables counting; GATE = 0 disables counting. If
GATE goes low while OUT is low, OUT is set high
immediately; no CLK pulse is required. A trigger reloads the
Counter with the initial count on the next CLK pulse. Thus
the GATE input can be used to synchronize the Counter.
After writing a Control Word and initial count, the Counter will
be loaded on the next CLK pulse. This allows the Counter to
be synchronized by software also.
Writing a new count while counting does not affect the
current counting sequence. If a trigger is received after
writing a new count but before the end of the current half-
cycle of the square wave, the Counter will be loaded with the
new count on the next CLK pulse and counting will continue
from the new count. Otherwise, the new count will be loaded
at the end of the current half-cycle.
NN
N
0
2
0
1
0
3
0
2
0
1
0
3
0
3
NNN
N
0
2
0
2
0
3
0
2
0
1
0
3
0
3
NN
N
0
3
0
2
0
1
0
5
0
4
0
3
0
4
WR
CLK
GATE
OUT
CW = 14
LSB = 3
WR
CLK
GATE
OUT
CW = 14
LSB = 3
WR
CLK
GATE
OUT
CW = 14
LSB = 4
LSB = 5
FIGURE 11. MODE 2
NN
N
0
2
0
4
0
2
0
4
0
2
0
4
0
2
0
4
0
4
0
2
NN
N
0
4
0
2
0
5
0
2
0
5
0
4
0
2
0
5
0
5
0
2
NN
N
0
2
0
4
0
2
0
2
0
2
0
4
0
2
0
4
0
4
0
2
WR
CLK
GATE
OUT
CW = 16 LSB = 4
WR
CLK
GATE
OUT
WR
CLK
GATE
OUT
CW = 16 LSB = 5
CW = 16 LSB = 4
FIGURE 12. MODE 3
相关PDF资料
PDF描述
M83723/83A1624N CONN RCPT 24POS WALL MT W/PINS
IS82C54-10 IC OSC PROG TIMER 10MHZ 28PLCC
VI-B5J-MX-B1 CONVERTER MOD DC/DC 36V 75W
IP82C54-10 IC OSC PROG TIMER 10MHZ 24DIP
VE-B4B-IU-F2 CONVERTER MOD DC/DC 95V 200W
相关代理商/技术参数
参数描述
IS82C54-10Z 功能描述:计时器和支持产品 PERIPH PRG-CNTR 5V 1 0MHZ 28PLCC IND RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel
IS82C54-10Z96 功能描述:计时器和支持产品 W/ANNEAL PERIPH PRG- CNTR 5V 10MHZ RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel
IS82C54-12 制造商:Rochester Electronics LLC 功能描述:- Bulk
IS82C5496 功能描述:计时器和支持产品 PERIPH PRG-CNTR 5V 8MHZ 28PLCC INDEL RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel
IS82C5496S2485 制造商:Rochester Electronics LLC 功能描述:- Bulk