參數(shù)資料
型號： ST7285C
廠商： 意法半導(dǎo)體
英文描述： 8-BIT MCU FOR RDS WITH 48K ROM, 3K RAM, ADC, TWO TIMERS, TWO SPIs, I2C AND SCI INTERFACES
中文描述： 8位微控制器48,000鐵路發(fā)展策略光盤，3K內(nèi)存，ADC，兩個定時器，2個SPI，I2C和脊髓損傷接口
文件頁數(shù)： 27/117頁
文件大?。?/td> 748K
代理商： ST7285C
27/117
ST7285C
I/O PORTS
(Cont’d)
4.1.3 I/O Port Implementation
On the ST7285C, the pull down is always absent,
the pull up exists only where an interrupt facility is
present (Ports C4, C5, D4, D5, F0, F1, F2, F3,
G3). On port A, the analog inputs are directly con-
trolled by the ADC.The I/O port register configura-
tions are reduced to the following.
4.1.3.1 Ports A0-A7, B0-B7, C0-C3, C6, C7, D0-
D3, D6, D7,E0-E7, F4-F7, G0-G2, G4-G7, H0-H5
These ports do not offer interrupt capabilities.
Note: Open drain I/O is implemented on I2C pins
(pins 19 and 20) and high voltage pins (PH3/4/5).
The design uses special I/O devices without P
channel, thus forbidding the push pull configura-
tion.
In this case there is neither pull up register nor op-
tion register. These registers do not exist and so
cannot be read or written to.
4.1.3.2 Ports C4, C5, D4, D5, F0-F3, G3
These ports offer interrupt capabilities.
In this case there is no pull up register since the
pull-up is present only when the interrupt feature is
selected. This register does not exist and so can-
not be read or written to.
Switching these I/O ports from one state to anoth-
er should be done in such a sequence as to pre-
vent unwanted side effects. Recommended safe
transitions are illustrated inFigure 14. Other tran-
sitions are potentially risky and should be avoided,
since they are likely to present unwanted side-ef-
fects such as spurious interrupt generation.
Figure 14. Recommended I/O State Transition Diagram
DDR
0
1
MODE
input
output
OPTION
no pull-up, no pull-down, no interrupt
push-pull (or open drain: see note)
DDR
OR
MOD
E
OPTION
0
0
input
no pull-up, no pull-down,
no interrupt
interrupt, pull-up
open-drain, no pull-up
push-pull, no pull-up,
no pull-down
0
1
1
0
input
output
1
1
output
11
00
01
Interrupt
pull-up
push-pull
no pull-up
no pull-down
open-drain
no pull-up
INPUT
OUTPUT
OUTPUT
10
no pull-up
no interrupt
no pull-down
(Reset state)
INPUT
XX
= DDR, OR
相關(guān)PDF資料
PDF描述
ST72T85A5Q6 8-BIT MCU FOR RDS WITH 48K ROM, 3K RAM, ADC, TWO TIMERS, TWO SPIs, I2C AND SCI INTERFACES
ST730C08L3 PHASE CONTROL THYRISTORS
ST730C08L3L PHASE CONTROL THYRISTORS
ST730C12L0 PHASE CONTROL THYRISTORS
ST730C12L0L PHASE CONTROL THYRISTORS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST7-28B56 功能描述:電源變壓器 SPLIT BOBBIN HORZ MOUNT XFMR RoHS:否 制造商:Triad Magnetics 功率額定值:12 VA 初級電壓額定值:115 V / 230 V 次級電壓額定值:12 V / 24 V 安裝風(fēng)格:SMD/SMT 一次繞組:Dual Primary Winding 二次繞組:Dual Secondary Winding 長度:2.5 in 寬度:2 in 高度:1.062 in
ST72A 制造商:DGS 功能描述:
ST72C104G1B6 功能描述:8位微控制器 -MCU Flash 4K SPI 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
ST72C104G1M1 制造商:STMicroelectronics 功能描述:8-BIT MICROCONTROLLER - Bulk
ST72C104G1M6 功能描述:8位微控制器 -MCU Flash 4K SPI 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(jìn)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(jìn)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

*
*
*