X-Size Registers; Table 13-12 X-Size Registers Description - Motorola DragonBall MC9328MX1 Reference Manual

13.4.2.2 X-Size Registers

The X-Size registers (XSRA and XSRB) contain the number of bytes per row of the window. The value of
this register is used by the DMA controller to determine when to jump to the next row.
XSRA
XSRB
BIT 31 30 29
TYPE r r r
0 0 0
RESET
BIT 15 14 13
TYPE rw rw rw
0 0 0
RESET
Name
Reserved Reserved—These bits are reserved and should read 0.
Bits 31–16
XS X-Size—Contains the number of bytes per row that define the X-Size of the 2D memory.
Bits 15–0
MOTOROLA
X-Size Register A
X-Size Register B
28 27 26 25
r r r r
0 0 0 0
12 11 10 9
rw rw rw rw
0 0 0 0
Table 13-12. X-Size Registers Description
Description
DMA Controller
24 23 22 21 20
r r r r r
0 0 0 0 0
0x0000
8 7 6 5 4
XS
rw rw rw rw rw
0 0 0 0 0
0x0000
Programming Model
Addr
0x00209044
0x00209050
19 18 17 16
r r r r
0 0 0 0
3 2 1 0
rw rw rw rw
0 0 0 0
Settings
13-17