
MB91460P Series
86
DS07-16615-2E
4.3.
Flash access timing settings in CPU mode
The Data Flash can be accessed up to CLKB = 100 MHz. For timing and wait state setup, please refer to the
Although the data flash is located in the address space of external bus, there is no dependency between external
bus timing and data flash timing.
4.4.
Auto Program Algorithms
The auto program algorithms can only be applied in direct access mode, while the “Program” sequence can be
generated by hardware if the Command Sequencer Mode is used.
The data flash supports command sequences similar to the main flash:
PA: Program Address
PD: Program Data. Data to be programmed at location PA.
RA: Read Address
RD: Data to read at location RA.
SA: Sector Address (points into the sector to be erased)
It is recommended that the addresses “AA8” and “554” point to the sector which is to be programmed.
For example, to program a byte into sector SAS, the following sequence should be used:
Address PA=0xFFFBFF83 is inside sector SAS.
1. write
addr=0xFFFBFAA8
data=0xAA
2. write
addr=0xFFFBF554
data=0x55
3. write
addr=0xFFFBFAA8
data=0xA0
4. write
addr=0xFFFBFF83 =PA
data=PD
Note: The address for the write sequence (1., 2., 3. write) points into the “Dummy addresses for auto algorithm”
here. For polling of toggle bits, an address pointing inside the programmed sector has to be used, for example
the programmed address (PA) itself.
1s t
bus
Write cycle
2 n d
bu s
Write cycle
3rd
bus
Write cycle
4th
bus
Write cycle
5th
bu s
Write cycle
6th
bu s
Write cycle
Command
Sequenc
e
Bus
Write
Cycle
Address
D a t a
Address
D a t a
Address
D a t a
Address
D a t a
Address
Data
Read/Reset
1
XXX
F0
RA
RD
Read/Reset
3
AA8
AA
554
55
AA8
F0
RA
RD
Program
4
AA8
AA
554
55
AA8
A0
PA
PD
Chip Erase
6
AA8
AA
554
55
AA8
80
AA8
AA
554
55
AA8
10
Sector Erase
6
AA8
AA
554
55
AA8
80
AA8
AA
554
55
SA
30
Sector Erase Suspend
Sector Erase Suspend by input of address “XXX" and data “B0”
Sector Erase Resume
Sector Erase Resume by input of address “XXX" and data “30”
Un l o c k
Bypass
set
3
AA8
AA
554
55
AA8
20
Un l o c k
Bypass
program
2
XXX
A0
PA
PD
Un l o c k
Bypass
Reset
2
XXX
90
XXX
F0/
00