Fujitsu 8FX User Manual

MB95630H Series
MN702-00009-2v0-E FUJITSU SEMICONDUCTOR LIMITED 481
CHAPTER 22 UART/SIO
22.7 Registers
22.7.3 UART/SIO Serial Status and Data Register ch. n
(SSRn)
The UART/SIO serial status and data register ch. n (SSRn) indicates the
transmission/reception status and error status of the UART/SIO.
■ Register Configuration
■ Register Functions
[bit7:6] Undefined bits
Their read values are always "0". Writing values to these bits has no effect on operation.
[bit5] PER: Parity error flag bit
This bit detects the parity error in receive data.
This bit is set to "1" when a parity error occurs during a receive operation reception. Writing "0" to the RERC
bit in the SMC2n register clears this bit.
When a parity error is detected at the same time as clearing this bit by writing "0" to the RERC bit, setting
this bit to "1" is given priority.
[bit4] OVE: Overrun error flag bit
This bit detects the overrun error in receive data.
This bit is set to "1" when an overrun error occurs during a receive operation reception. Writing "0" to the
RERC bit in the SMC2n register clears this bit.
When an overrun error is detected at the same time as clearing this bit by writing "0" to the RERC bit, setting
this bit to "1" is given priority.
[bit3] FER: Framing error flag bit
This bit detects the framing error in receive data.
This bit is set to "1" when a framing error occurs during a receive operation reception. Writing "0" to the
RERC bit in the SMC2n register clears this bit.
When a framing error is detected at the same time as clearing this bit by writing "0" to the RERC bit, setting
this bit to "1" is given priority.
bit 7 6 5 4 3 2 1 0
Field — — PER OVE FER RDRF TCPL TDRE
Attribute — — R R R R R/W R
Initial value 0 0 0 0 0 0 0 1
bit5 Details
Reading "0" Indicates that no parity error has occurred.
Reading "1" Indicates that a parity error has occurred.
bit4 Details
Reading "0" Indicates that no overrun error has occurred.
Reading "1" Indicates that an overrun error has occurred.
bit3 Details
Reading "0" Indicates that no framing error has occurred.
Reading "1" Indicates that a framing error has occurred.

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English