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Memory Controller
TLFA—Timer Loop Field A
This field specifies the number of times a loop defined in the UPMA RAM word is executed
for a periodic timer service.
0001 = The loop is executed 1 time.
0010 = The loop is executed 2 times.
0011 = The loop is executed 3 times.
0100 = The loop is executed 4 times.
0101 = The loop is executed 5 times.
0110 = The loop is executed 6 times.
0111 = The loop is executed 7 times.
1000 = The loop is executed 8 times.
1001 = The loop is executed 9 times.
1010 = The loop is executed 10 times.
1011 = The loop is executed 11 times.
1100 = The loop is executed 12 times.
1101 = The loop is executed 13 times.
1110 = The loop is executed 14 times.
1111 = The loop is executed 15 times.
0000 = The loop is executed 16 times.
15.3.1.6 MACHINE B MODE REGISTER. The machine B mode register (MBMR) contains
the configuration for the user-programmable B machine. See Figure 15-1 (page 15-3) for
more information.
MBMR
BIT
0
1
2
FIELD
RESET
R/W
ADDR
BIT
16
17
18
FIELD
G0CLB
RESET
0
R/W
R/W
ADDR
Note: The UPM refresh is done in a round robin manner. If more than one chip-select
uses the same UPM, the refreshes will progress through each one. For example,
if you have three chip-selects using UPMA, you would need to set the periodic
timer A period to one-third the normal refresh.
15-22
3
4
5
6
7
PTB
0
R/W
(IMMR & 0xFFFF0000) + 0x174
19
20
21
22
23
GPLB4
RLFB
DIS
1
0
R/W
R/W
(IMMR & 0xFFFF0000) + 0x176
MPC823e REFERENCE MANUAL
8
9
10
11
12
PTBE
AMB
RES
0
0
0
R/W
R/W
R/W
24
25
26
27
28
WLFB
0
R/W
13
14
15
DSB
RES
0
0
R/W
R/W
29
30
31
TLFB
0
R/W
MOTOROLA
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