mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 384

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

Memory Controller
Anywhere from 0 to 30 wait states can be programmed for TA generation. The WEx signals
are available for each byte that is written to memory. Also, an OE signal is provided to
eliminate external glue logic. On system reset, a global chip-select (CS0) is asserted to
provide a boot ROM chip-select before the system is fully configured.
NOTE: SCY is the number of wait cycles from the option register.
TRLX
0
1
OPTION REGISTER
ACCESS
ATTRIBUTES
TYPE
Read
Write
Read
Write
EBDF CSNT
—
00
01
—
00
01
—
—
0
1
0
1
Table 15-2. GPCM Strobe Signal Behavior
Freescale Semiconductor, Inc.
ACS
00
10
11
00
10
11
00
10
11
00
10
11
00
10
11
00
10
11
00
10
11
00
10
11
For More Information On This Product,
(1+1/4)*Clock
(1+1/2)*Clock
(1+1/4)*Clock
(1+1/2)*Clock
(1+1/4)*Clock
(1+1/2)*Clock
(1+1/4)*Clock
(1+1/2)*Clock
ASSERTED
ADDRESS
1/4*Clock
1/2*Clock
1/4*Clock
1/2*Clock
1/4*Clock
1/2*Clock
1/4*Clock
1/2*Clock
TO CSx
MPC823 REFERENCE MANUAL
0
0
0
0
0
0
0
0
Go to: www.freescale.com
ASSERTED
1+3/4*Clock
1+3/4*Clock
ADDRESS
3/4*Clock
3/4*Clock
TO OE
—
—
ASSERTED
1+3/4*Clock
1+3/4*Clock
1+3/4*Clock
1+3/4*Clock
1+3/4*Clock
1+3/4*Clock
ADDRESS
3/4*Clock
3/4*Clock
3/4*Clock
3/4*Clock
TO WEx
—
—
SIGNAL BEHAVIOR
ASSERTED
-1/4*Clock
-1/4*Clock
-1/4*Clock
-1/4*Clock
3/4*Clock
3/4*Clock
3/4*Clock
3/4*Clock
3/4*Clock
3/4*Clock
TO WEx
DATA
—
—
1+1/2*Clock
1+3/8*Clock
ADD/DATA
NEGATED
1/4* Clock
1/2*Clock
1/4*Clock
3/8*Clock
1/4*Clock
1/4*Clock
INVALID
CSx
TO
1+1/2*Clock
1+3/8*Clock
ADD/DATA
NEGATED
1/4*Clock
1/2*Clock
3/8*Clock
1/4*Clock
INVALID
WEx
TO
—
—
MOTOROLA
NUMBER
2+2*SCY
3+2*SCY
2+2*SCY
3+2*SCY
4+2*SCY
3+2*SCY
4+2*SCY
CYCLES
TOTAL
2+SCY
OF