MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
13-4
Freescale Semiconductor
13.2
External Signal Description
shows a list of signals required for flash.
13.2.1
Voltage for Flash Only (V
FLASH)
V
FLASH
is a supply required for reads of the flash core. This voltage is specified as 3.3V with a tolerance
of
0.3 V.
13.2.2
Program and Erase Voltage for Flash Only (V
PP
)
V
PP
is a supply required for program and erase of the flash core. This voltage is specified as 5 V with a
tolerance of -0.5 V/+0.25 V during program and erase operations. V
PP
is required at all times, even during
normal reads of flash memory. During read operations, V
PP
can be as high as 5.3 V and as low as 3.0 V.
13.3
Memory Map/Register Description
The FBIU occupies a 512-MB portion of the address space. The actual flash array is multiply-mapped
within this space.
The MPC5553/MPC5554 internal flash has a feature that allows the internal flash timing to be modified
to emulate an external memory, hence the name, external emulation mode. The upper five address lines
are used to provide additional timing control that allows the FBIU response timing on the system bus
(which must be controlled in order to provide for timing emulation of alternate memory types). Refer to
.
Figure 13-3. FBIU Address Scheme
This feature allows calibration parameters to be tested using an external memory; and then in production,
the internal flash access timing is modified to match timing of the external memory. The access time of the
internal flash is lengthened based on the address range being accessed. To access an area with a slower
access time, the address is modified per
Table 13-1. Signal Properties
Name
Function
Reset State
V
FLASH
Flash read power supply
NA
V
PP
Flash program/erase power supply
NA
Table 13-2. Internal Flash External Emulation Mode
Address Range
YYYYY
Wait States
0x0000_0000
0x001F_FFFF
00000
0
0x0100_0000
0x011F_FFFF
01000
8
Flash Array Access or
0bYYYYY_0000_0000_0000_0000_0000_0000 -
Flash Shadow Row Access
YYYYY - additional primary wait-states
0bYYYYY_1111_1111_1111_1111_1111_1111
Summary of Contents for MPC5553
Page 5: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 2 Freescale Semiconductor...
Page 21: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 xvi Freescale Semiconductor...
Page 47: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 1 26 Freescale Semiconductor...
Page 163: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 4 20 Freescale Semiconductor...
Page 179: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 5 16 Freescale Semiconductor...
Page 561: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 13 38 Freescale Semiconductor...
Page 615: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 14 54 Freescale Semiconductor...
Page 707: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 17 68 Freescale Semiconductor...
Page 755: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 18 48 Freescale Semiconductor...
Page 873: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 19 118 Freescale Semiconductor...
Page 984: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 Freescale Semiconductor 21 41...
Page 985: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 21 42 Freescale Semiconductor...
Page 1019: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 22 34 Freescale Semiconductor...
Page 1129: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 25 90 Freescale Semiconductor...