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7906 参数 Datasheet PDF下载

7906图片预览
型号: 7906
PDF下载: 下载PDF文件 查看货源
内容描述: 16位单片机 [16-BIT SINGLE-CHIP MICROCOMPUTER]
分类和应用: 计算机
文件页数/大小: 531 页 / 3056 K
品牌: RENESAS [ RENESAS TECHNOLOGY CORP ]
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APPENDIX  
Appendix 2. Control registers  
b7 b6 b5 b4 b3 b2 b1 b0  
At reset R/W  
UART0 transmit/receive control register 0 (Address 3416  
UART1 transmit/receive control register 0 (Address 3C16  
)
)
Function  
Reference  
Bit  
0
Bit name  
b1 b0  
11-7  
BRG count source select bits  
0
0
0
1
RW  
RW  
RW  
RO  
0 0 : Clock f2  
0 1 : Clock f16  
1 0 : Clock f64  
1 1 : Clock f512  
1
2
3
0 : The CTS function is selected.  
1 : The RTS function is selected.  
CTS/RTS function select bit  
(Note 1)  
Transmit register empty flag  
0 : Data is present in the transmit register.  
(Transmission is in progress.)  
1 : No data is present in the transmit register.  
(Transmission is completed.)  
0
0
0
RW  
RW  
RW  
0 : The CTS/RTS function is enabled.  
1 : The CTS/RTS function is disabled.  
4
5
6
CTS/RTS enable bit  
0 : Reception interrupt  
1 : Reception error interrupt  
UARTi receive interrupt mode  
select bit  
CLK polarity select bit  
(This bit is used in the clock  
synchronous serial I/O mode.)  
(Note 2)  
0 : At the falling edge of the transfer clock, transmit  
data is output; at the rising edge of the transfer  
clock, receive data is input.  
When not in transferring, pin CLKis level is H.”  
1 : At the falling edge of the transfer clock, transmit  
data is output; at the falling edge of the transfer  
clock, receive data is input.  
When not in transferring, pin CLKis level is L.”  
0 : LSB (Least Significant Bit) first  
1 : MSB (Most Significant Bit) first  
0
RW  
7
Transfer format select bit  
(This bit is used in the clock  
synchronous serial I/O mode.)  
(Note 2)  
Notes 1: Valid when the CTS/RTS enable bit (bit 4) is 0and CTSi/RTSi separate select bit (bit 0 or 1 at address AC16) is 0.”  
2: Fix these bits to 0in the UART mode or when serial I/O is disabled.  
b7 b6 b5 b4 b3 b2 b1 b0  
UART0 transmit/receive control register 1 (Address 3516)  
UART1 transmit/receive control register 1 (Address 3D16)  
Function  
Bit  
0
Bit name  
At reset R/W  
Reference  
0 : Transmission disabled  
1 : Transmission enabled  
0
RW  
Transmit enable bit  
11-9  
Transmit buffer empty flag  
Receive enable bit  
0 : Data is present in the transmit buffer register.  
1 : No data is present in the transmit buffer register.  
1
2
1
0
RO  
0 : Reception disabled  
1 : Reception enabled  
RW  
Receive complete flag  
Overrun error flag  
0 : No data is present in the receive buffer register.  
1 : Data is present in the receive buffer register.  
3
4
5
6
7
0
0
0
0
0
RO  
RO  
RO  
RO  
RO  
0 : No overrun error  
1 : Overrun error detected  
Framing error flag  
(Valid in UART mode)  
(Note)  
0 : No framing error  
1 : Framing error detected  
Parity error flag  
(Valid in UART mode)  
(Note) 0 : No parity error  
1 : Parity error detected  
0 : No error  
1 : Error detected  
Error sum flag  
(Valid in UART mode)  
(Note)  
Note: Bits 5 to 7 are invalid in the clock synchronous serial I/O mode.  
7906 Group Users Manual Rev.2.0  
20-16  
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