HD64570 Datasheet, PDF (102/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

4.2.4 Interrupt Status Register 0 (ISR0)
The read-only interrupt status register 0 indicates the status of interrupt request sources. All bits
are cleared to 0 at a reset.
7
6
5
4
3
2
1
0
Bit name TXINT1RXINT1TXRDYR1 XRDY1TXINT0RXINT0TXRDY0RXRDY0
Read/Write
Initial value
R
R
R
R
R
R
R
R
0
0
0
0
0
0
0
0
MSCI channel 1 TXINT
0: Not requested
1: Requested
MSCI channel 1 RXINT
0: Not requested
1: Requested
MSCI channel 1 TXRDY
0: Not requested
1: Requested
MSCI channel 1 RXRDY
0: Not requested
1: Requested
Note: Initial values are the values after a hardware reset.
MSCI channel 0 RXRDY
0: Not requested
1: Requested
MSCI channel 0 TXRDY
0: Not requested
1: Requested
MSCI channel 0 RXINT
0: Not requested
1: Requested
MSCI channel 0 TXINT
0: Not requested
1: Requested
Bit 7 (TXINT1: MSCI Channel 1 TXINT):
TXINT1 = 0: MSCI channel 1 is not requesting a TxINT interrupt.
TXINT1 = 1: MSCI channel 1 is requesting a TxINT interrupt.
Rev. 0, 07/98, page 86 of 453