TMP92CF30
2009-06-12
92CF30-190
3.10.1 Control Registers
The SDRAMC has the following control registers.
SDRAM Access Control Register
7
6
5
4
3
2
1
0
Bit symbol
SRDS
−
SMUXW1 SMUXW0
SPRE SMAC
Read/Write R/W
R/W
Reset State
1
0
0
0
0
0
SDACR
(0250H)
Function Read
data
shift
function
0: Disable
1: Enable
Always
write “0”
Address multiplex
type
00: Type A (A9- )
01: Type B (A10- )
10: Type C (A11- )
11: Reserved
Read/Write
commands
0: Without
auto
precharge
1: With auto
precharge
SDRAM
controller
0: Disable
1: Enable
SDRAM Command Interval Setting Register
7 6 5 4 3 2 1 0
Bit symbol
STMRD
STWR
STRP
STRCD
STRC2
STRC1
STRC0
Read/Write
R/W
Reset State
1
1
1
1
1
0
0
TRC
SDCISR
(0251H)
Function
TMRD
0: 1 CLK
1: 2 CLK
TWR
0: 1 CLK
1: 2 CLK
TRP
0: 1 CLK
1: 2 CLK
TRCD
0: 1 CLK
1: 2 CLK
000: 1 CLK
001: 2 CLK
010: 3 CLK
011: 4 CLK
100: 5 CLK
101: 6 CLK
110: 7 CLK
111: 8 CLK
SDRAM Refresh Control Register
7 6 5 4 3 2 1 0
Bit symbol
−
SSAE
SRS2
SRS1
SRS0
SRC
Read/Write R/W
R/W
Reset
State
0 1 0 0 0 0
Refresh interval
SDRCR
(0252H)
Function Always
write “0”
Self
Refresh
auto exit
function
0:Disable
1:Enable
000: 47 states
001: 78 states
010: 156 states
011: 312 states
100: 468 states
101: 624 states
110: 936 states
111: 1248 states
Auto
Refresh
0:Disable
1:Enable
Содержание TLCS-900/H1 Series
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