LSI Logic Confidential
15-32
Serial I/O Port
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
15.5.3 SIO IDC Registers
DoMiNo supports both read and write in master and slave mode on the
IDC interface. The data rate is 100 kHz to 400 kHz.
Ten different registers control the IDC operation, and 12 registers are
devoted to DMA management (6 for TX, 6 for RX).
Note:
RSVD (Reserved) bits must always be written as 0 and are
undefined when read.
IDC Control Register 1 (IDC_CONTROL1)
Offset = 0xBE0080
Read/Write
Default = 0x0000 0000
SN
Send No-Acknowledge in Slave Receiver Mode
29
1 = A Nack is generated after the current byte is received
in slave receiver mode.
0 = A stop, start, or repeat start condition is detected.
This bit reads back as 0.
VD
Byte2Rd field has valid data
28
1 = Transfer data from bits [27:23] to the internal state
machine.
This bit clears itself and reads back as 0.
Byte2Rd
# of Bytes to read when Master Receiver
[27:24]
This field tells the internal state machine how many bytes
to read. The VD bit must be 1 to validate the data.
These bits read back as 0.
MM
Master Mode
23
1 = The transaction is a master read from the external
device.
0 = The transaction is a master write to the external
device.
31
30
29
28
27
24
23
22
21
20
19
18
17
16
Reserved
SN
VD
Byte2Rd
MM
LB
FR
FT
IE
RS
ME
SE
15
0
Reserved
Содержание DMN-8600
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