HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 104

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

4.2.5
The read-only interrupt status register 1 indicates the status of interrupt request sources. All bits
are cleared to 0 at a reset.
Bit 7 (DMIB3: DMA Channel 3 Interrupt B):
DMIB3 = 0: DMAC channel 3 is not requesting a DMIB interrupt.
DMIB3 = 1: DMAC channel 3 is requesting a DMIB interrupt.
Rev. 0, 07/98, page 88 of 453
DMA channel 3 interrupt B
0:
1:
DMA channel 3 interrupt A
0:
1:
DMA channel 2 interrupt B
0:
1:
DMA channel 2 interrupt A
0:
1:
Read/Write
Initial value
Bit name
Note: Initial values are the values after a hardware reset.
Not requested
Requested
Not requested
Requested
Not requested
Requested
Not requested
Requested
Interrupt Status Register 1 (ISR1)
DMIB3 DMIA3 DMIB2
7
R
0
6
R
0
5
R
0
DMIA2 DMIB1 DMIA1 DMIB0 DMIA0
4
R
0
3
R
0
2
R
0
DMA channel 0 interrupt B
0:
1:
DMA channel 1 interrupt A
0:
1:
DMA channel 1 interrupt B
0:
1:
DMA channel 0 interrupt A
0:
1:
Not requested
Requested
Not requested
Requested
Not requested
Requested
Not requested
Requested
1
R
0
R
0
0