參數(shù)資料
型號： DS89C21TMX
元件分類： 收發(fā)器
英文描述： Transceiver
中文描述： 收發(fā)器
文件頁數(shù)： 7/48頁
文件大?。?/td> 934K
代理商： DS89C21TMX
DS89C430/DS89C440/DS89C450
7 of 48
Note 15:
The clock divide and crystal multiplier control bits in the PMR register determine the system clock frequency and the minimum/
maximum external clock speed. The term “1/t
CLCL
” used in the
AC Characteristics
variable timing table is determined from the
following table. The minimum/maximum external clock speed columns clarify that [(external clock speed) x (multipliers)] cannot
exceed the rated speed of the device. In addition, the use of the crystal multiplier feature establishes a minimum external speed.
External Clock Speed
4X/
2X
CD1
CD0
Number of External Clock
Cycles per System Clock
(1/t
CLCL
)
1
2
Reserved
4
1/1024
Min
Max
1
0
X
X
X
0
0
0
1
1
0
0
1
0
1
10MHz
5MHz
—
8.25MHz
16.5MHz
—
See AC Characteristics
See AC Characteristics
See AC Characteristics
See AC Characteristics
Note 16:
External MOVX instruction times are dependent upon the setting of the MD2, MD1, and MD0 bits in the clock control register. The
terms “t
STC1
, t
STC2
, t
STC3
” used in the variable timing table above are calculated through the use of the table given below.
MD2
0
0
0
0
1
1
1
1
MD1
0
0
1
1
0
0
1
1
MD0
0
1
0
1
0
1
0
1
MOVX Instruction Time
2 Machine Cycles
3 Machine Cycles
4 Machine Cycles
5 Machine Cycles
6 Machine Cycles
7 Machine Cycles
8 Machine Cycles
9 Machine Cycles
t
STC1
0 t
CLCL
2 t
CLCL
6 t
CLCL
10 t
CLCL
14 t
CLCL
18 t
CLCL
22 t
CLCL
26 t
CLCL
t
STC2
0 t
CLCL
1 t
CLCL
1 t
CLCL
1 t
CLCL
5 t
CLCL
5 t
CLCL
5 t
CLCL
5 t
CLCL
t
STC3
0 t
CLCL
0 t
CLCL
0 t
CLCL
0 t
CLCL
4 t
CLCL
4 t
CLCL
4 t
CLCL
4 t
CLCL
t
STC4
0 t
CLCL
0 t
CLCL
0 t
CLCL
0 t
CLCL
1 t
CLCL
1 t
CLCL
1 t
CLCL
1 t
CLCL
t
STC5
0 t
CLCL
1 t
CLCL
1 t
CLCL
1 t
CLCL
1 t
CLCL
1 t
CLCL
1 t
CLCL
1 t
CLCL
Note 17:
Maximum load capacitance (to meet the above timing) for Port 0, ALE,
PSEN
,
WR,
and
RD
is limited to 60pF. XTAL1 and XTAL2 load
capacitance are dependent upon the frequency of the selected crystal.
Figure 1. Nonpage Mode Timing
ALE
Port 0
Port 2
LSB
DATA
XTAL1
PSEN
RD
MSB
MSB
MSB
MSB
MSB
WR
LSB
LSB
LSB
LSB
DATA
MOVX
MOVX
OPCODE
t
CLCL
t
AVLL2
t
AVLL
t
LHLL
t
WLWH
t
LLAX2
t
LLWL
t
LLPL
t
PXIX
t
LLAX
t
LLIV
t
AVIV0
t
PLPH
t
PLIV
t
AVLL3
t
LLAX3
t
RLRH
t
PLAZ
t
WHLH
t
WHQX
t
QVWX
t
AVIV2
t
AVDV2
t
AVWL2
t
PXIZ
t
LLDV
t
AVDV0
t
RHDX
t
RHDZ
t
RLDV
t
AVWL0
相關(guān)PDF資料
PDF描述
DSDK101 Low-Cost Demo Kit Motherboard
E.FL-LP-040 CABLE ; Connector type A:MFD-Titan; Connector type B:MFD-Titan; Length, lead:5m
E15R8-FREQ-OUT14 CRYSTAL OSCILLATOR, CLOCK, 30 MHz - 200 MHz, ECL OUTPUT
E1L51-AW0A4-05 T-1 3/4 SINGLE COLOR LED, WHITE, 5 mm
E1SBA10-9.8304MTR QUARTZ CRYSTAL RESONATOR, 9.8304 MHz
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS89C21TMX/NOPB 功能描述:RS-422接口集成電路 RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率: 工作電源電壓:5 V 電源電流:35 mA 工作溫度范圍: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-16 封裝:Tube
DS89C386 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Twelve Channel CMOS Differential Line Receiver
DS89C386TMEA 功能描述:總線接收器 RoHS:否 制造商:Texas Instruments 接收機數(shù)量:4 接收機信號類型:Differential 接口類型:EIA/TIA-422-B, V.11 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-16 封裝:Reel
DS89C386TMEA/NOPB 功能描述:總線接收器 RoHS:否 制造商:Texas Instruments 接收機數(shù)量:4 接收機信號類型:Differential 接口類型:EIA/TIA-422-B, V.11 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-16 封裝:Reel
DS89C386TMEAX 制造商:Texas Instruments 功能描述:Twelve Receiver RS-422 48-Pin SSOP T/R
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*