参数资料
型号: MB89PV630C-SH
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 10 MHz, MICROCONTROLLER, CDIP64
封装: CERAMIC, MDIP-64
文件页数: 140/153页
文件大小: 7326K
代理商: MB89PV630C-SH
MB89630 SERIES HARDWARE MANUAL
2-64
(c) Serial status and data register (SSD)
This register is used to indicate the current status of the UART. When the data communication length is 9
bits, the most significant data (bit 8) is included.
[Bit 7] RDRF:
The RDRF flag is used to indicate the data status of the serial input data register (SIDR).
When the SIDR register is read after reading the SSD register with the RDRF flag set to 1, the RDRF
flag is cleared. When this flag is set to 1, the receiver interrupt request is output.
[Bit 6] ORFE:
The ORFE flag is used to indicate that an overrun or framing error has occurred. This flag is initialized
to 0 at reset.
If this flag is set, data is not transferred from the receive shift register to the SIDR register.
When the SIDR register is read after reading the SSD register with the ORFE flag set to 1, the ORFE
flag is cleared. When this flag is set to 1, the receiver interrupt request is output.
The status of input data is specified by the RDRF and ORFE flags as follows:
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