NXP Semiconductors PXN2020 - 12.3.2.8 Platform Flash Configuration Register for Port n (PFCRPn)

Flash Memory Array and Control
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor 12-17
12.3.2.8 Platform Flash Configuration Register for Port n (PFCRPn)
The PFLASH configuration register for port 0 (PFCRP0) is used to specify operation of port p0 of the flash
memory module. This register also has two bits (ARB and PRI) to control arbitration between the p0/p1
ports.
The PFLASH configuration register for port 1 (PFCRP1) is used to specify operation of port p1 of the flash
memory module.
The PFCRPn register is shown in Figure 12-10 and Table 12-11.
Table 12-10. ADR Field Descriptions
Field Description
SAD Shadow Address. The SAD bit qualifies the address captured during an ECC Event Error, Single Bit Correction,
or State Machine operation.
The SAD register is not writable.
0 Address Captured is from Main Array Space.
1 Address Captured is from Shadow Array Space.
ADDR[20:3] Address. The ADR register provides the first failing address in the event of ECC event error (MCR[EER] set),
single bit correction (MCR[SBC] set), as well as providing the address of a failure that may have occurred in a
state machine operation (MCR[PEG] cleared). ECC event errors take priority over single bit corrections, which
take priority over state machine errors. This is especially valuable in the event of a RWW operation, where the
read senses an ECC error or single bit correction, and the state machine fails simultaneously. This address is
always a Double Word address that selects 64 bits.
The ADR register is writable, and can be used in the UTest ECC Logic Check. If the ECC logic check is enabled
(UT0[EIE] = 1) then the ADR register will not update for ECC event error, single bit correction, or state machine
errors.
If MCR[EER] or MCR[SBC] are set, the ADR register is locked from writing. MCR[PEG] does not affect the
writability of the ADR register.
Offset: FLASH_REGS_BASE + 0x001C (PFCRP0)
FLASH_REGS_BASE + 0x0020 (PFCRP1) Access: User read/write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
LBCFG ARB PRI
0
M8PFE
0
M6PFE M5PFE M4PFE
0
M2PFE M1PFE M0PFE
W
Reset
1
00—
2
—
2
—
3
—
3
0000000000
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
APC WWSC RWSC
0
DPF
EN
0
IPFEN
0
PFLIM BFEN
W
Reset1111111100000000
1
Reset value for PFCRP0 = 0x0800_FF00, PFCRP1 = 0x3000_FF00.
2
Reset value for port 0 is LBCFG = 0b0000, port 1 is LBCFG = 0b0011.
3
ARB and PRI are only available in PFCRP0. ARB is reset to 1 and PRI is reset to 0. For PFCRP1, ARB and PRI
are both reserved, with a reset value of 0.
Figure 12-10. Platform Flash Configuration Register for Port n (PFCRPn)