Figure618 . x_fstart register, Table620 . x_fstart field descriptions, 19 dma function code register (fun_code) – Freescale Semiconductor POWERPC MPC860T User Manual
Page 50: Figure619 . fun_code register, Dma function code register (fun_code) -18, X_fstart register -18, Fun_code register -18, X_fstart field descriptions -18, Freescale semiconductor, inc, Table 6-20 describes x_fst art þelds
6-18
MPC860T (Rev. D) Fast Ethernet Controller Supplement
MOTOROLA
PRELIMINARYÑSUBJECT TO CHANGE WITHOUT NOTICE
Table 6-20 describes X_FSTART Þelds.
6.2.19 DMA Function Code Register (FUN_CODE)
The FUN_CODE register, shown in Figure 6-19, contains the function code and byte order
Þelds to be used during each transfer between the DMA and the SDMA interface. These
bits can be written/read by the user.
Bits
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
Ñ
Reset
0000_0000_0000_0000
R/W
Read/write
Addr
0xEEC
Bits
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Field
Ñ
1
X_FSTART
Ñ
Reset
0000_0
1
Microcode dependent
00
R/W
Read/write
Addr
0xEEE
Figure 6-18. X_FSTART Register
Table 6-20. X_FSTART Field Descriptions
Bits
Name
Description
0Р21
С
Reserved. Note that all bits read back as 0 except for 21 which returns a 1.
22Ð29
X_FSTART
Address of Þrst transmit FIFO location.
30Р31
С
Reserved. Should be written to zero by the host processor.
Bits
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
Field
Ñ DATA_BO0 DATA_BO1
DESC_BO0
DESC_BO1
FC1 FC2 FC3
Ñ
Reset
UndeÞned
R/W
Read/write
Addr
0xF34
Bits
16
17
18
19
20
21
22
23
24 25 26 27 28 29 30 31
Field
Ñ
Reset
UndeÞned
R/W
Read/write
Addr
0xF36
Figure 6-19. FUN_CODE Register
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