HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 271
HD64570
Manufacturer Part Number
HD64570
Description
Serial Communications Adaptor
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD64570.pdf
(469 pages)
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Bit 5 (BOFE: Buffer Overflow/Underflow Interrupt Enable): The function of this bit is
described below.
Bit 4 (COFE: Counter Overflow Interrupt Enable): The function of this bit is described
below.
Bits 3–0: Reserved. These bits always read 0 and must be set to 0.
Reserved. When read, the value of this bit is undefined. This bit can be set to 0 or 1.
Chained-block transfer mode
The EOME bit enables or disables a DMA frame end interrupt (DMIB) caused by the EOM bit
of DSR as follows:
EOME = 0: Disables an interrupt (DMIB) caused by the EOM bit
EOME = 1: Enables an interrupt (DMIB) caused by the EOM bit
Single-block transfer mode
Reserved. When read, the value of this bit is undefined. This bit can be set to 0 or 1.
Chained-block transfer mode
The BOFE bit enables or disables a buffer overflow/underflow interrupt (DMIA) caused by the
BOF bit of DSR as follows:
BOFE = 0: Disables an interrupt (DMIA) caused by the BOF bit
BOFE = 1: Enables an interrupt (DMIA) caused by the BOF bit
Single-block transfer mode
Reserved. When read, the value of this bit is undefined. This bit can be set to 0 or 1.
Chained-block transfer mode
The COFE bit enables or disables a counter overflow interrupt (DMIA) caused by the COF bit
of DSR as follows:
COFE = 0: Disables an interrupt (DMIA) caused by the COF bit
COFE = 1: Enables an interrupt (DMIA) caused by the COF bit
Rev. 0, 07/98, page 255 of 453
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