HD64570F Renesas Electronics America, HD64570F Datasheet - Page 267
HD64570F
Manufacturer Part Number
HD64570F
Description
IC SCA SRL COMM ADAPTER 88QFP
Manufacturer
Renesas Electronics America
Datasheet
1.HD64570F.pdf
(469 pages)
Specifications of HD64570F
Applications
ISDN
Interface
Serial
Voltage - Supply
4.5 V ~ 5.5 V
Package / Case
88-QFP
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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HD64570F16
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6.2.8
The DMA mode register (DMR), provided for each of channels 0, 1, 2, and 3, specifies DMA
transfer mode and number of DMA frames (single or multiple). This register also enables or
disables the frame end interrupt counter (FCT).
This register must be set in DMA initial state.
Bits 7–5: Reserved. These bits always read 0 and must be set to 0.
Bit 4 (TMOD: DMA Transfer Mode): Specifies the DMAC operation mode in either single-
block transfer mode or chained-block transfer mode as follows. This bit is reset to 0.
TMOD = 0: Specifies single-block transfer mode
TMOD = 1: Specifies chained-block transfer mode
Notes: 1.
Single-block
transfer mode
Chained-block
transfer mode
Read/Write
Initial value
DMA Mode Register (DMR)
DMA transfer mode
0:
1:
2.
Single-block transfer
Chained-block transfer
Reserved. When read, this bit is undefined and can be set to 0 or 1.
Reserved. These bits always read 0 and must be set to 0.
—
—
7
0
*2
—
—
6
0
*2
—
—
5
0
*2
Number of DMA frames
•
0:
1:
Frame end interrupt counter (FCT)
enable/disable
•
Set this bit to 0
•
0:
1:
Chained-block transfer
Single frame
Multi-frame
Single-block transfer
Chained-block transfer
Frame end interrupt counter (FCT) disabled
Frame end interrupt counter (FCT) enabled
TMOD
R/W
4
0
—
—
3
0
*2
R/W
Rev. 0, 07/98, page 251 of 453
—
NF
2
0
*1
CNTE
R/W
1
0
—
—
0
0
*2
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