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HT56RU25 Folha de dados(PDF) 62 Page - Holtek Semiconductor Inc

Nome de Peças HT56RU25
Descrição Electrónicos  DAC?갏SO7816, UART, A/D
Download  155 Pages
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Fabricante Electrônico  HOLTEK [Holtek Semiconductor Inc]
Página de início  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT56RU25 Folha de dados(HTML) 62 Page - Holtek Semiconductor Inc

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Rev. 1.10
62
2014-05-19
Rev. 1.10
63
2014-05-19
HT56RU25
内置
DAC、ISO7816 及 UART 接口的
低功耗
A/D 型智能卡 OTP 单片机
Bit 5
HBBn:I2C 总线忙标志位
0:I2C 总线闲
1:I2C 总线忙
HBBn 位是 I2C 总线的忙标志位。当检测到 START 信号时,I2C 总线将处于忙状
态,此时
HBBn 位为 1。当检测到 STOP 信号时,I2C 总线将处于闲状态,HBBn
位为
0。
Bit 4
HTXn:选择 I2C 从机设备为发送器或接收器
0:从机设备为接收器
1:从机设备为发送器
Bit 3
TXAKn:I2C 总线发送确认标志位
0:从机发送确认标志
1:从机不发送确认标志
TXAKn 位是发送确认标志位。单片机接收 8 位数据之后会将该位在第九个时钟
传到总线上。如果单片机想要接收更多的数据,则应在接收数据之前将
TXAKn
位设置为
0。
Bit 2
SRWn:I2C 从机读写标志位
0:从机设备应处于接收模式
1:从机设备应处于发送模式
SRWn 位是从机读写标志位。决定主机是否希望传输或接收来自 I2C 总线的数
据。当传输地址和从机的地址相同时,
HAASn 位会被设置为高,主机将检测
SRWn 位来决定进入发送模式还是接收模式。如果 SRWn 位为高时,主机会请
求从总线上读数据,此时设备处于发送模式。当
SRWn 位为 0 时,主机往总线
上写数据,设备处于接收模式以读取该数据。
Bit 1
未定义,读为“
0”
Bit 0
RXAKn:I2C 总线接收确认标志位
0:从机接收确认标志
1:从机不接收确认标志
RXAKn 位是接收确认标志位。如果RXAKn 位被重设为0,即8位数据传输之后,
设备在第九个时钟有接收到一个正确的确认位。如果单片机处于发送状态,发
送方会检查
RXAKn 位来判断接收方是否愿意继续接收下一个字节。因此直到
RXAKn 为 1 时,发送才停止发送数据。这时,发送方将释放 SDAn 线,主机发
出停止信号。
SIMn 控制寄存器 2 – SIMnCTL2 (n=0 或 1),用于 SPI 模式
Bit
7
6
5
4
3
2
1
0
Name
CKPOLn CKEGn MLSn CSENn WCOLn TRFn
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
0
0
Bit 7~6
未定义,读为“
0”
Bit 5
CKPOLn:决定 SPI 时钟线的初始状态
0:当 SPI 时钟线无效时 SCKn 线为高
1:当 SPI 时钟线无效时 SCKn 线为低
CKPOLn 位决定的是时钟线的初始状态,如果该位设为高则在无效时钟周期内
SCKn 线的电平将处于低。如果该位设为低则在无效时钟周期内 SCKn 线将处于
高电平。


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