參數(shù)資料
型號: DSP16210
英文描述: TVS 400W 6.5V UNIDIRECT SMA
中文描述: DSP16210數(shù)字信號處理器
文件頁數(shù): 45/173頁
文件大小: 2621K
代理商: DSP16210
Data Sheet
July 2000
DSP16210 Digital Signal Processor
Lucent Technologies Inc.
DRAFT COPY
45
Hardware Architecture
(continued)
Modular I/O Units (MIOUs)
(continued)
I/O Buffer Configuration
The application allocates a portion of IORAM
0,1
for an input (output) buffer by programming the input (output)
base register
IBAS
0,1
(
OBAS
0,1
) and the input (output) limit register
ILIM
0,1
(
OLIM
0,1
). The base regis-
ter specifies the first IORAM
0,1
location in the buffer and the limit register specifies the last IORAM
0,1
location
in the buffer. The size of the input buffer is
ILIM
0,1
IBAS
0,1
+ 1. The size of the output buffer is
OLIM
0,1
OBAS
0,1
+ 1. MIOU
0,1
circularly advances
miwp
0,1
(
morp
0,1
) within the frame defined by
the input (output) base and input (output) limit registers.
Figure 17
illustrates the input and output buffer configura-
tion.
Figure 17. Input and Output Buffer Configuration in IORAM
0,1
The following example code segment initializes the
IBAS0
register:
#define ibase0 0x0100
#define WRibase0 0x0000
a3 = WRibase0 | ibase0
mcmd0 = a3
/* IORAM0 location 0x100 (parameter)
/* MIOU command to load IBAS0 (opcode)
/* OR to concatenate opcode and parameter
/* Issue command IBAS0_LD
*/
*/
*/
*/
MIOU
0,1
increments
miwp
0,1
each time it transfers an input sample from the peripheral to IORAM
0,1
. When
miwp
0,1
equals
ILIM
0,1
, MIOU
0,1
loads
miwp
0,1
with the contents of
IBAS
0,1
at the completion of the
following input transaction. MIOU
0,1
increments
morp
0,1
each time it transfers an output sample from
IORAM
0,1
. When
morp
0,1
equals
OLIM
0,1
, MIOU
0,1
loads
morp
0,1
with the contents of
OBAS
0,1
at
the completion of the following output transaction.
UNPROCESSED
OUTPUT DATA
OLIM0
morp0
OBAS0
ILIM0
miwp0
IBAS0
0x3FF
EAB
(IORAM0)
0xC03FF
YAB
(CORE)
0x000
0xC0000
SPACE FOR
FUTURE INPUT DATA
AVAILABLE
DATA STORAGE
AVAILABLE
DATA STORAGE
AVAILABLE
DATA STORAGE
PROCESSED
OUTPUT DATA
IORAM0
(PHIF16)
OLIM1
morp1
OBAS1
ILIM1
miwp1
IBAS1
0x3FF
EAB
(IORAM1)
0xD03FF
YAB
(CORE)
0x000
0xD0000
IORAM1
(SSIO)
VALID INPUT DATA
KEY:
INPUT BUFFER
OUTPUT BUFFER
UNPROCESSED
OUTPUT DATA
SPACE FOR
FUTURE INPUT DATA
AVAILABLE
DATA STORAGE
AVAILABLE
DATA STORAGE
PROCESSED
OUTPUT DATA
VALID INPUT DATA
AVAILABLE
DATA STORAGE
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