HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 288
HD64570
Manufacturer Part Number
HD64570
Description
Serial Communications Adaptor
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD64570.pdf
(469 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD64570CP
Manufacturer:
RENESAS
Quantity:
6 500
Company:
Part Number:
HD64570CP
Manufacturer:
HIT
Quantity:
5 510
Company:
Part Number:
HD64570CP
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
HD64570CP16
Manufacturer:
HIT
Quantity:
5 510
Company:
Part Number:
HD64570CP16
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
HD64570F
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
HD64570F16
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
HD64570F16
Manufacturer:
HITACHI/日立
Quantity:
20 000
Company:
Part Number:
HD64570F16V
Manufacturer:
INFINEON
Quantity:
12 000
- Current page: 288 of 469
- Download datasheet (3Mb)
The operation flow in memory-to-MSCI chained-block transfer mode is shown in figure 6.13. As
shown in the figure, a DMA transfer starts with loading the contents of the descriptor specified by
CPB and CDA into the SCA internal registers. The DMAC then transfers data to the MSCI
transmitter from the buffer corresponding to the descriptor specified by CPB and CDA. At this
time, the DMAC writes the 24-bit memory address of the buffer currently being read to the buffer
address register (BAR) and the number of bytes remaining unread in the buffer to the byte count
register (BCR). When data transfer starts, the DMAC writes the BP value of the corresponding
descriptor to BAR and the data length (DL) value of the corresponding descriptor to BCR.
The BAR value is incremented by 1 or 2 each time one byte or one word of data is transferred,
respectively. Similarly, the BCR value is decremented by 1 or 2 each time one byte or one word
of data is transferred, respectively. When the BCR value reaches 0000H, the DMAC terminates
data transfer and updates the CDA value to indicate the start address of the next descriptor (buffer
switching), after which data is read from the buffer specified by the descriptor. In this way, the
DMAC transfers data from the buffers specified by the descriptor by updating the descriptors.
Rev. 0, 07/98, page 272 of 453
CPB:
EDA:
CDA:
BAR:
BCR:
EDA (16 bits)
CDA (16 bits)
BAR (24 bits)
BCR (16 bits)
CPB (8 bits)
HD64570
Chain pointer base
Error descriptor address register
Current descriptor address register
Buffer address register
Byte count register
Figure 6.13 Memory-to-MSCI Chained-Block Transfer Mode
High-order 8 bits of the
descriptor address
Start address of the
read underflow descriptor
(low-order 16 bits)
Start address of the
descriptor being read
(low-order 16 bits)
Memory address of
the data being read
Byte count of the
data remaining in
the buffer being
transferred to the MSCI
System memory
Descriptor
: Empty buffer
: Data already transferred to MSCI
: Data to be transferred to MSCI
Buffer
Related parts for HD64570
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
(HD64 Series) Hitachi Single-Chip Microcomputer
Manufacturer:
Hitachi Semiconductor
Datasheet:
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
LOW FREQUENCY POWER AMPLIFIER
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon N-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON N-CHANNEL JUNCTION FET LOW FREQUECY LOW NOISE AMPLIFIER
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon P-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon P-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON SPEED POWER SWITCHING
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON P-CHANNEL MOS FET HIGH SPEED POWER SWITCHING
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON P-CHANNEL MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
SILICON P-CHANNEL MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet:
Part Number:
Description:
Silicon P-Channel MOS FET
Manufacturer:
HITACHI [Hitachi Semiconductor]
Datasheet: