Rainbow Electronics T89C5121 - Manual (Page 41)

41
A/T8xC5121
4164G–SCR–07/06
Table 18. SCIIR Register
SCIIR (S:AEh, SCRS = 0)
Smart Card UART Interrupt
Identification Register (read only)
Reset Value = 0X00 0000b
7 6 5 4 3 2 1 0
SCTBI - CIccERR CVccERR SCWTI SCTI SCRI SCPI
Bit
Number Bit Mnemonic Description
7 SCTBI
SCIB transmit buffer interrupt
This bit is set by hardware when the Transmit Buffer is copied to the transmit
shift register of the Smart Card UART.
It is cleared by hardware when this register is read.
6 -
Reserved
The value read from this bit is indeterminate. Do not change this bit or write 0.
5 CIccERR
Card current status
This bit is set when the output current goes out of the current range.
It is cleared by hardware when this register is read.
4 CVccERR
Card voltage status
This bit is set when the output voltage goes out of the voltage range specified
by CVcc field.
It is cleared by hardware when this register is read.
3 SCWTI
Smart card wait Timeout interrupt
This bit is set by hardware when the Smart Card Timer 0 times out.
It is cleared by hardware when this register is read.
2 SCTI
Smart card transmit interrupt
This bit is set by hardware when the Smart Card UART completes a
character transmission.
It is cleared by hardware when this register is read.
1 SCRI
Smart card receive interrupt
This bit is set by hardware when the Smart Card UART completes a
character reception.
It is cleared by hardware when this register is read.
0 SCPI
Smart card parity error interrupt
This bit is set at the same time as SCTI or SCRI if a parity error is detected.
It is cleared by hardware when this register is read.