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Intel® PXA26x Processor Family Developer’s Manual 6-59
Memory Controller
:
13:12 — Reserved
11:7
MCATTx_
ASST
Code for the command assertion time – See Table 6-30 for a description of this code and
its affects on the command assertion.
6:0
MCATTx_
SET
Minimum Number of memory clocks to set up address before command assertion for
MCATT for socket x is equal to MCATTx_SET + 2.
Table 6-29. MCIOx Register Bitmap
0x4800 0038
0x4800 003C
MCIO0
MCIO1
Processor
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
IOx_
HOLD
Reserved
IOx_
ASST
IOx_
SET
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bits Name Description
31:20 — Reserved
19:14
MCIOx_
HOLD
Minimum Number of memory clocks to set up address before command assertion for MCIO
for socket x is equal to MCIOx_HOLD + 2.
13:12 — Reserved
11:7
MCIOx_
ASST
Code for the command assertion time. See Table 6-30 for a description of this code and its
affects on the command assertion.
6:0 MCIOx_SET
Minimum Number of memory clocks to set up address before command assertion for MCIO
for socket x is equal to MCIOx_SET + 2.
Table 6-30. Card Interface Command Assertion Code Table
MCMEMx_ASST
MCATTx_ASST
MCIOx_ASST
x_ASST_WAIT
x_ASST_HOLD
x_ASST_WAIT +
x_ASST_HOLD
(nPIOW asserted) (nPIOR asserted) (nPIOW asserted) (nPIOR asserted)
Programmed
Bit Value
Code
decimal
value
# MEMCLKs
(minimum)
to wait before
checking for
nPWAIT=’1’
# MEMCLKs
(minimum)
to assert
command
(nPIOW) after
nPWAIT=’1’
# MEMCLKs
(minimum)
to assert
command
(nPIOR) after
nPWAIT=’1’
# MEMCLKs
(minimum)
command
assertion time
# MEMCLKs
(minimum)
command
assertion time
(Code) (Code) (Code + 2) (2*Code + 3) (2*Code + 4) (3*Code + 5) (3*Code + 6)
00000023456
00001135689
00010 2 4 7 8 11 12
00011 3 5 9 10 14 15
00100 4 6 11 12 17 18
Table 6-28. MCATTx Register Bitmap