參數(shù)資料
型號： PIC16C621A
廠商： Allegro MicroSystems, Inc.
元件分類： 8位微控制器
英文描述： 8-bit Microcontroller(8位微控制器)
中文描述： 8位微控制器（8位微控制器）
文件頁數(shù)： 4/8頁
文件大小： 89K
代理商： PIC16C621A
PIC16C621A
8-BIT
MICROCONTROLLER
4
Table 2 — Microcontroller terminal descriptions
DIP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
SSOP
1
2
3
4
5, 6
7
8
9
10
11
12
13
14
15, 16
17
18
19
20
Function
Input
Input
Input
Input
Power
Output
I/O
Output
Output
Output
Output
Output
Output
Power
Output
Input
Input
Input
Description
Mode select 1
Mode select 2
Step in
Reset
Ground
Monitor out
Shift clock
Serial data out
Strobe out
Phase B
PFD B
Phase A
PFD A
Supply
Osc/clock out
Osc/clock in
Direction control
Mode select 0
Comments, connections, etc.
Static and/or dynamic control of stepping mode
Static and/or dynamic control of stepping mode
Governs full-step rate (
÷
8 for A3955;
÷
16 for A3957)
Resets DIR., MS2, MS1, and MS0 to 0000 (detent)
Logic power return
Signals full-step rotor alignment (active low)
Pull up for A3955; pull down for A3957
Shifts 8-bit serial data to 74HC595 serial input
Latches 8-bit data into 74HC595 (latch clock in)
Controls current direction in phase B
Phase B recirculation control
Controls current direction in phase A
Phase A recirculation control
(V
DD
) Recommended range: 4.5 V to 5.5 V
Crystal oscilator connection
Crystal oscillator connection/external clock input
Determines direction of step motor rotation
Static and/or dynamic control of stepping mode
FUNCTIONAL DESCRIPTION (cont’d)
Mode-select inputs
These three inputs (MS2, MS1, and MS0) determine
the stepping format, disable/enable motor power, and reset
the controller/sequencer. In conjunction with the direction
input, the mode inputs control the sixteen operating states
listed. Deactivating stepper power in any position except
‘detent’ (i.e., a single phase activated) results in the motor
rotor advancing, or retracting, from its intermediate
position and alignment with a natural (i.e., minimum-
reluctance flux field) orientation. The absolute position
may be affected by inertia, load, fractional position,
ringing, etc. and cannot be determined without feedback.
Phase currents must be maintained to immobilize the
rotor/load in any intermediate position.
Step (clock) input
The sequencer stepping-clock frequency is a multiple
of the actual stepping rate. The A3955 requires a step-
ping-clock input frequency equal to eight times the
intended stepping rate for the motor; the A3957 requires a
stepping clock rate that is sixteen times the actual stepping
rate of the motor. However, neither design necessitates
that the step frequency be varied should the operating
mode(s) be switched during operation. Shifting from one
stepping format does not mandate a simultaneous (and
equivalent) change in the clock frequency.
Using a 20 MHz crystal (maximum limit for the
PIC16C621A) allows a 50 kHz stepping clock for the
A3955, and this equates to 6 250 full steps per second (50
kHz/8). For the A3957 this 50 kHz stepping clock trans-
相關(guān)PDF資料
PDF描述
PIC18F6310 64/80-Pin Flash Microcontrollers with nanoWatt Technology
PIC18F8310 64/80-Pin Flash Microcontrollers with nanoWatt Technology
PIC18F66J60 64/80/100-Pin, High-Performance, 1 Mbit Flash Microcontrollers with Ethernet
PIC18F66J65 64/80/100-Pin, High-Performance, 1 Mbit Flash Microcontrollers with Ethernet
PIC18F67J60 64/80/100-Pin, High-Performance, 1 Mbit Flash Microcontrollers with Ethernet
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16C621A/JW 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16C621A-04/P 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16C621A-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C621 DIP18
PIC16C621A-04/SO 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16C621A-04/SS 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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

*
*
*