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參數(shù)資料
| 型號(hào)： | ST72P63BH4T1 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, ROHS COMPLIANT, LQFP-48 |
| 文件頁(yè)數(shù)： | 140/145頁(yè) |
| 文件大小： | 2984K |
| 代理商： | ST72P63BH4T1 |
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ST7263BDx ST7263BHx ST7263BKx ST7263BE
94/145
IC bus interface (Cont’d)
IC Status Register 1 (SR1)
Read Only
Reset value: 0000 0000 (00h)
Bit 7 = EVF Event flag.
This bit is set by hardware as soon as an event oc-
curs. It is cleared by software reading SR2 register
in case of error event or as described in Figure 45.
It is also cleared by hardware when the interface is
disabled (PE=0).
0: No event
1: One of the following events has occurred:
– BTF=1 (byte received or transmitted)
– ADSL=1 (Address matched in Slave mode
while ACK=1)
– SB=1 (Start condition generated in Master
mode)
– AF=1 (No acknowledge received after byte
transmission)
– STOPF=1 (Stop condition detected in Slave
mode)
– ARLO=1 (Arbitration lost in Master mode)
– BERR=1 (Bus error, misplaced Start or Stop
condition detected)
– Address byte successfully transmitted in Mas-
ter mode.
Bit 6 = Reserved. Forced to 0 by hardware.
Bit 5 = TRA Transmitter/Receiver.
When BTF is set, TRA=1 if a data byte has been
transmitted. It is cleared automatically when BTF
is cleared. It is also cleared by hardware after de-
tection of Stop condition (STOPF=1), loss of bus
arbitration (ARLO=1) or when the interface is disa-
bled (PE=0).
0: Data byte received (if BTF=1)
1: Data byte transmitted
Bit 4 = BUSY Bus busy.
This bit is set by hardware on detection of a Start
condition and cleared by hardware on detection of
a Stop condition. It indicates a communication in
progress on the bus. The BUSY flag of the I2CSR1
register is cleared if a Bus Error occurs.
0: No communication on the bus
1: Communication ongoing on the bus
Note:
– The BUSY flag is NOT updated when the inter-
face is disabled (PE=0). This can have conse-
quences when operating in Multimaster mode;
i.e. a second active I2C master commencing a
transfer with an unset BUSY bit can cause a con-
flict resulting in lost data. A software workaround
consists of checking that the I2C is not busy be-
fore enabling the I2C Multimaster cell.
Bit 3 = BTF Byte transfer finished.
This bit is set by hardware as soon as a byte is cor-
rectly received or transmitted with interrupt gener-
ation if ITE=1. It is cleared by software reading
SR1 register followed by a read or write of DR reg-
ister. It is also cleared by hardware when the inter-
face is disabled (PE=0).
– Following a byte transmission, this bit is set after
reception of the acknowledge clock pulse. In
case an address byte is sent, this bit is set only
after the EV6 event (See Figure 45). BTF is
cleared by reading SR1 register followed by writ-
ing the next byte in DR register.
– Following a byte reception, this bit is set after
transmission of the acknowledge clock pulse if
ACK=1. BTF is cleared by reading SR1 register
followed by reading the byte from DR register.
The SCL line is held low while BTF=1.
0: byte transfer not done
1: byte transfer succeeded
Bit 2 = ADSL Address matched (Slave mode).
This bit is set by hardware as soon as the received
slave address matched with the OAR register con-
tent or a general call is recognized. An interrupt is
generated if ITE=1. It is cleared by software read-
ing SR1 register or by hardware when the inter-
face is disabled (PE=0).
The SCL line is held low while ADSL=1.
0: Address mismatched or not received
1: Received address matched
Bit 1 = M/SL Master/Slave.
This bit is set by hardware as soon as the interface
is in Master mode (writing START=1). It is cleared
by hardware after detecting a Stop condition on
the bus or a loss of arbitration (ARLO=1). It is also
cleared when the interface is disabled (PE=0).
0: Slave mode
1: Master mode
70
EVF
0
TRA
BUSY
BTF
ADSL
M/SL
SB
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參數(shù)描述 |
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| ST72T101G1M6 | 功能描述:8位微控制器 -MCU OTP EPROM 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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 |
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| ST72T101G2M6 | 功能描述:8位微控制器 -MCU RO 511-ST72C104G2M6 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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 |
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