PEB20534H-10 SIEMENS [Siemens Semiconductor Group], PEB20534H-10 Datasheet - Page 69

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PEB20534H-10

Manufacturer Part Number
PEB20534H-10
Description
DMA Supported Serial Communication Controller with 4 Channels DSCC4
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet

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Table 13 shows how many bytes can be valid in the first 32-bit word depending on ADD
for both little endian mode and big endian mode. Of course, the total number of valid
bytes depends on the ’NO’ bit field value in the corresponding transmit descriptor.
Table 13
ADD
00
01
10
11
Example A: NO = 3
00
Example B: NO = 2
01
Example C: NO = 8
10
Example D: NO = 1
11
Semiconductor Group
Valid Bytes
4, if NO > 3
3, if NO > 2
2, if NO > 1
1, if NO > 0
Number of
Meaning of ADD in Little/Big Endian Mode
3
2
2
4
2
1
byte 3 byte 2 byte 1 byte 0 byte 0 byte 1 byte 2 byte 3
byte 2 byte 1 byte 0
byte 1 byte 0
byte 0
byte 1 byte 0
byte 5 byte 4 byte 3 byte 2 byte 2 byte 3 byte 4 byte 5
byte 0
-
-
-
11
Little Endian (Intel)
byte 2 byte 1 byte 0 byte 0 byte 1 byte 2
byte 1 byte 0
-
-
-
10
byte 7 byte 6 byte 6 byte 7
69
-
-
-
-
01
DMA Controller and Central FIFOs
-
-
-
-
-
-
00
-
-
-
-
-
-
Big Endian (Motorola)
11
byte 0 byte 1 byte 2
byte 0 byte 1
-
-
-
-
10
Data Sheet 09.98
byte 0 byte 1
byte 0 byte 1
PEB 20534
-
-
-
01
byte 0
byte 0
-
-
-
00

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