AN211
Rev 0.5 | 20/24
www.cmostek.com
5.2 Chip Hardware Options
LOCK
Enable : Code dumped on a Writer is locked to 0xFF for security
Disable : Code dumped on a Writer is not locked
SB
Enable : Code dumped on a Writer is scrambled for security
Disable : Code dumped on a Writer is not scrambled
MOVCL
Enable : MOVC instruction executed from external program memory is disabled for security.
Disable : MOVC is always enabled.
EN6T
Enable : MCU runs at 6T mode (each machine-cycle has 6 clocks).
Disable : MCU runs at 12T mode (each machine-cycle has 12 clocks)
HWBS
Enable : When power-on, MCU will boot from ISP-memory if ISP-memory exists
Disable : (No action)
OSCDN
Enable : Used under 16MHz for EMI reduction. (The gain of oscillating amplifier is reduced.)
Disable : The gain of crystal oscillator is enough for higher Fosc oscillating
AUX_RAM
Enable : The internal auxiliary RAM access is disabled when the ERAM bit =0 ( AUXR.bit1 ) and when ERAM bit =1 the
internal auxiliary RAM access is enable
Disable : The internal auxiliary RAM access is enable when the ERAM bit =0 ( AUXR.bit1 ) and when ERAM bit =1 the
internal auxiliary RAM access is disabled
FZWDTCR
Enable : The WDTCR register will be initialized to its reset value only by power-on reset
Disable : The WDTCR register will be initialized to its reset value by all reset (including power-on, H/W, S/W and WDT
reset)
ENLVR
Enable : Enable Low-Voltage Reset (LVR) , the LVR is around 2.4V for 3.3V device and 3.7V @12MHz for 5.0V device
Disable : Disable LVR
LVFWP
Enable : Enable LVFWP (Low-Voltage Flash-Write Protection) while IAP or ISP programming
Disable : Disable LVFWP
ENROSC
Enable : MCU will used the internal 6MHz oscillator
Disable : MCU will used the external oscillator
HWENW
Enable : Automatically enable Watch-dog Timer by hardware when MCU is powered up
