参数资料
型号: ST7FLCD1G9M1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDSO28
封装: ROHS COMPLIANT, SO-28
文件页数: 51/96页
文件大小: 846K
代理商: ST7FLCD1G9M1
ST7FLCD1
IC Single-Master Bus Interface
Error Case:
AF: Detection of a non-acknowledge bit. In this case, the EVF and AF bits are set by hardware with
an interrupt if the ITE bit is set. To resume, set the START or STOP bit.
Note:
The SCL line is not held low if AF = 1.
EV1:
EVF = 1, SB = 1, cleared by reading the SR register followed by writing to the DR register.
EV2:
EVF = 1, cleared by reading the SR register followed by writing to the CR register (for
example PE = 1).
EV2-1: EVF = 1, AF = 1, cleared by reading the SR register followed by writing STOP = 1 in the CR
register.
EV3:
EVF = 1, BTF = 1, cleared by reading the SR register followed by reading the DR register.
EV3-1: Same as EV3, but ACK bit in CR register must be cleared before reading the DR register in
order to send a NAK pulse after the “Data N” byte.
EV3-2: Same as EV3, but STOP = 1 must be written in the CR register.
EV4:
EVF = 1, BTF = 1, cleared by reading the SR register followed by writing to the DR register.
Figure 30: Transfer Sequencing
Figure 31: Event Flags and Interrupt Generation
Master Receiver:
Master Transmitter:
Slave Not Responding:
S
Address
A
Data1
A
Data2
A
.....
Data N-1
A
Data N
NA
P
EV1
EV2
EV3
EV3-1
EV3-2
S
Address
A
Data1
A
Data2
A
.....
DataN
A
P
EV1
EV2
EV4
S
Address
NA
P
EV1
EV2-1
Legend:
S = Start, P = Stop, A = Acknowledge,
NA = Non-acknowledge
EVx = Event (with interrupt if ITE = 1)
BTF
SB
AF
EVF
Interrupt
ITE
*
* EVF can also be set by EV6 or an error from the SR2 register.
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