CDR3 Flash (UC3F) EEPROM
MPC561/MPC563 Reference Manual, Rev. 1.2
21-22
Freescale Semiconductor
Blocks of the UC3F EEPROM that are protected (PROTECT[M] = 1, SBEN[N] = 1 and SBPROTECT[N]
= 1) will not be programmed. Also, if EPEE = 0, no programming voltages will be applied to the array. If
B0EPEE = 0, no programming voltages will be applied to block 0 or small block 0 depending on the state
of SBEN[0] and the configuration of the array.
21.3.7.1
Program Sequence
The UC3F EEPROM module requires a sequence of writes to the high voltage control register
(UC3FCTL) and to the program data latch in order to enable the high voltage to the array or shadow
information for program operation. The required hardware program sequence follows.
1. Write PROTECT[0:7] and SBPROTECT[0:1] to disable protection on blocks to be programmed.
2. Write BLOCK[0:7] and SBBLOCK[0:1] to select the array blocks to be programmed, SES = 1 and
PE = 0 in the UC3FCTL register.
NOTE
BLOCK[0:7] and SBBLOCK[0:1] in conjunction with SBEN[0:1]
determine which blocks/small blocks in the array are enabled for
programming operation. Just because a BLOCK or SBBLOCK bit is
enabled (set to 1), no programming can occur in the corresponding
block/small block unless the programming operation specifically targets an
address location within that block/small block to program. If BLOCK or
SBBLOCK is not set to 1, no address locations in that corresponding block
or small block can be programmed.
3. Programming write — A successful write to the array location to be programmed. This write
updates the program data latch with the information to be programmed. In addition, the addressof
the first programming write is latched in the UC3F memory interface block. All accesses of the
array after the first write are to the same address regardless of the address provided. Thus the
locations accessed after the first programming write are limited to the location to be programmed.
The last write to the program data latch is saved for programming.
NOTE
If a byte of the program data latch has not received a programming write, no
programming voltages will be applied to the corresponding byte in the array.
Once EHV has been set, writes to the program data latch are disabled until
EHV is cleared to 0.
4. Write EHV = 1 in the UC3FCTL register.
NOTE
The values of the EPEE and B0EPEE inputs are latched with the assertion
of EHV to determine the array protection state for the program operation. It
is assumed that the EPEE and B0EPEE inputs are setup prior to the assertion
of EHV.
5. Read the UC3FCTL register until HVS = 0.
6. Read the UC3FCTL, confirm PEGOOD = 1.
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...