C8051F85X86X Datasheet, PDF (59/290 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

10.5. Flash Control Registers
C8051F85x/86x
Register 10.1. PSCTL: Program Store Control
Bit
7
6
5
4
3
2
1
0
Name
Reserved
PSEE
PSWE
Type
R
RW
RW
Reset
0
0
0
0
0
0
0
0
SFR Address: 0x8F
Table 10.2. PSCTL Register Bit Descriptions
Bit
Name
Function
7:2
Reserved Must write reset value.
1
PSEE Program Store Erase Enable.
Setting this bit (in combination with PSWE) allows an entire page of flash program mem-
ory to be erased. If this bit is logic 1 and flash writes are enabled (PSWE is logic 1), a
write to flash memory using the MOVX instruction will erase the entire page that contains
the location addressed by the MOVX instruction. The value of the data byte written does
not matter.
0: Flash program memory erasure disabled.
1: Flash program memory erasure enabled.
0
PSWE Program Store Write Enable.
Setting this bit allows writing a byte of data to the flash program memory using the MOVX
write instruction. The flash location should be erased before writing data.
0: Writes to flash program memory disabled.
1: Writes to flash program memory enabled; the MOVX write instruction targets flash
memory.
Preliminary Rev 0.6
59