- 您现在的位置：买卖IC网 > PDF目录98145 > ST72T774S9T1 (STMICROELECTRONICS) 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP44 PDF资料下载
参数资料
| 型号： | ST72T774S9T1 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | TQFP-44 |
| 文件页数： | 10/144页 |
| 文件大小： | 1280K |
| 代理商： | ST72T774S9T1 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页
ST72774/ST727754/ST72734
107/144
DDC INTERFACE (Cont’d)
4.8.5.2 DDC/CI - Factory Alignment Interface
4.8.5.2.1 Functional Description
Refer to the CR, SR1 and SR2 registers in Section
4.8.6. for the bit definitions.
The DDC/CI interface works as an I/O interface
between the microcontroller and the DDC2Bi,
EDDC or Factory alignment protocols. It receives
and transmits data in Slave I2C mode using an
interrupt or polled handshaking.
The interface is connected to the I2C bus by a data
pin (SDAD) and a clock pin (SCLD) configured as
open drain.
The DDC/CI interface has five internal register
locations.
Two of them are used for initialization of the
interface:
– Own Address Register OAR
– Control register CR
The following four registers are used during data
transmission/reception:
– Data Register DR
– Control Register CR
– Status Register 1 SR1
– Status Register 2 SR2
The interface decodes an I2C or DDC2Bi address
stored by software in the OAR register and/or the
EDDC address (60h/61h) as its default hardware
address.
After a reset, the interface is disabled.
4.8.5.2.2 I2C Modes
s
General description
In I2C mode, the interface can operate in the
following modes:
– Slave transmitter/receiver
Both start and stop conditions are generated by
the master. The I2C clock (SCL) is always
received by the interface from a master, but the
interface is able to stretch the clock line.
The interface is capable of recognizing both its
own programmable address (7-bit) and its default
hardware address (Enhanced DDC address: 60h/
61h). The Enhanced DDC address detection may
be enabled or disabled by software. It never
recognizes the Start byte (01h) whatever its own
address is.
s
Slave Mode
As soon as a start condition is detected, the
address is received from the SDA line and sent to
the shift register; then it is compared with the
programmable address of the interface or the
Enhanced DDC address (if selected by software).
Address not matched: the interface ignores it
and waits for another Start condition.
Address matched: the following events occur in
sequence:
– Acknowledge pulse is generated if the ACK bit is
set.
– EVF and ADSL bits are set.
– An interrupt is generated if the ITE bit is set.
Then the interface waits for a read of the SR1
register, holding the SCL line low (see Figure 67
Transfer sequencing EV1).
Next, the DR register must be read to determine
from the least significant bit if the slave must enter
Receiver or Transmitter mode.
相关PDF资料 |
PDF描述 |
|---|---|
| ST7294C6B6 | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDIP28 |
| ST72T94C6M6 | 8-BIT, OTPROM, MICROCONTROLLER, PDSO28 |
| ST72C171K2B6 | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32 |
| ST72E85A5G0 | 8-BIT, UVPROM, 4.332 MHz, MICROCONTROLLER, CQFP80 |
| ST72F321J9T7 | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST730 | 制造商:IRF 制造商全称:International Rectifier 功能描述:PHASE CONTROL THYRISTORS Hockey Puk Version |
| ST7-30 | 制造商:SUPERWORLD 制造商全称:Superworld Electronics 功能描述:POWER TRANSFORMER |
| ST-7300 | 制造商:GC Electronics 功能描述: |
| ST730186-3 | 制造商:KEMET Corporation 功能描述: 制造商:KET 功能描述: |
| ST730268-1 | 制造商:KEMET Corporation 功能描述: 制造商:KET 功能描述: |
发布紧急采购，3分钟左右您将得到回复。