NXP Semiconductors KL25 Series - Freescale Semiconductor, Inc

27.33.5 Flash Common Command Object Registers
(FTFA_FCCOBn)
The FCCOB register group provides 12 bytes for command codes and parameters. The
individual bytes within the set append a 0-B hex identifier to the FCCOB register name:
FCCOB0, FCCOB1, ..., FCCOBB.
Address: 4002_0000h base + 4h offset + (1d × i), where i=0d to 11d
Bit 7 6 5 4 3 2 1 0
Read
CCOBn
Write
Reset
0 0 0 0 0 0 0 0
FTFA_FCCOBn field descriptions
Field Description
7–0
CCOBn
The FCCOB register provides a command code and relevant parameters to the memory controller. The
individual registers that compose the FCCOB data set can be written in any order, but you must provide all
needed values, which vary from command to command. First, set up all required FCCOB fields and then
initiate the command’s execution by writing a 1 to the FSTAT[CCIF] bit. This clears the CCIF bit, which
locks all FCCOB parameter fields and they cannot be changed by the user until the command completes
(CCIF returns to 1). No command buffering or queueing is provided; the next command can be loaded
only after the current command completes.
Some commands return information to the FCCOB registers. Any values returned to FCCOB are available
for reading after the FSTAT[CCIF] flag returns to 1 by the memory controller.
The following table shows a generic flash command format. The first FCCOB register, FCCOB0, always
contains the command code. This 8-bit value defines the command to be executed. The command code is
followed by the parameters required for this specific flash command, typically an address and/or data
values.
NOTE: The command parameter table is written in terms of FCCOB Number (which is equivalent to the
byte number). This number is a reference to the FCCOB register name and is not the register
address.
FCCOB Number Typical Command Parameter Contents [7:0]
0 FCMD (a code that defines the flash command)
1 Flash address [23:16]
2 Flash address [15:8]
3 Flash address [7:0]
4 Data Byte 0
5 Data Byte 1
6 Data Byte 2
7 Data Byte 3
8 Data Byte 4
9 Data Byte 5
Memory Map and Registers
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
430 Freescale Semiconductor, Inc.