HD64570F Renesas Electronics America, HD64570F Datasheet - Page 258
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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6.2.2
One set of three 8-bit subregisters, serving as the source address registers (SAR: SARL, SARH,
SARB) or chain pointer base (CPB) depending on the transfer mode, is provided for each of
channels 0, 1, 2, and 3 (figure 6.2).
Single-Block Transfer Mode: In single-block transfer mode, the three 8-bit sub-registers serve
as the source address registers (SAR: SARL, SARH, SARB) for specifying the 24-bit source
address of the data to be transferred. SARB, SARH, and SARL specify bits 23–16, 15–8, and 7–0
of the source address, respectively. This register can directly access a maximum of 16 Mbytes of
memory space.
This register must be set in DMA initial state.
After reset, the value of this register is undefined.
Rev. 0, 07/98, page 242 of 453
• Channels: 0, 2
• Channels: 1, 3
Single-block transfer
mode
Chained-block
transfer mode
Single-block transfer
mode
Chained-block
transfer mode
Channels 0, 2: Chain Pointer Base (CPB)
Channels 1, 3: Source Address Register (SAR: SARL, SARH, SARB)/Chain
Pointer Base (CPB)
Figure 6.1 Destination Address Register/Buffer Address Register
23
23
Not used
DARB
BARB
BARB
B
B
16 15
16 15
Not used
DARH
BARH
BARH
H
H
8 7
8 7
Not used
DARL
BARL
BARL
L
L
0
0
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