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8 The Parallax Assembler
Table 16 - Parallax Assembler DEVICE Options
Setting
Description
Default
SX18/SX18L
SX28/SX28L
SX48
SX52
OSCHS3/OSCXTMAX
OSCHS2/OSCXT5
OSCHS1/OSCXT4
OSCXT2/OSCXT3
OSCXT1
OSCLP2
OSCLP1/OSCXTMIN
OSCRC
OSC4MHZ
OSC1MHZ
OSC128KHZ
OSC32KHZ
Specifies the device type
High speed crystal/res., 1MHz…75MHz *
High speed crystal/res., 1MHz…50MHz *
High speed crystal/res., 1MHz…50MHz *
Normal crystal/res., 1MHz…24MHz *
Normal crystal/res., 32kHz…10MHz *
Low power crystal/res., 32kHz…1MHz *
Low power crystal/resonator, 32kHz *
External RC circuit
Specifies internal oscillator @ 4MHz
Specifies internal oscillator @ 1 MHz
Specifies internal oscillator @ 128 kHz
Specifies internal oscillator @ 32 kHz
SX18
OSCHS2
4 MHz
IFBD
XTLBUFD / DRIVEOFF
Disables the internal feedback resistor, i.e. an external feedback resistor is
required between the OSC1 and OSC2 pins
Disables the crystal drive (on OSC2 pin). Use this option to lower power
consumption when using a crystal-oscillator-pack connected only to OSC1
pin.
internal feedback
resistor enabled
enabled
DRT18MS
DRT60MS
DRT960MS
DRT60US
BOR42
BOR26
BOR22
Device reset timer waits 18 ms
Device reset timer waits 60 ms
Device reset timer waits 960 ms
Device reset timer waits 60 us
Brownout to trigger at < 4.2 volts
Brownout to trigger at < 2.6 volts
Brownout to trigger at < 2.2 volts
DRT18MS
no brownout
TURBO
STACKX_OPTIONX
CARRYX
Specifies turbo mode (1:1 execution)
Stack is extended to 8 levels and Option register is extended to 8 bits
ADD and SUB instructions use Carry flag as input*
1:4 execution
2 levels/6 bits
Carry flag ignored
SYNC
WATCHDOG
PROTECT
Input Syncing enabled
Watchdog Timer enabled
Code Protect enabled
Input Syncing
disabled
Watchdog disabled
Code Protect
disabled
SLEEPCLOCK
Clock is enabled during sleep
No clock during sleep
* Many instructions are adversely affected by the carry flag when CARRYX is specified. See Appendix B (chapter 1) and
Appendix C (chapter 0) for more information.
Shaded areas indicate SX48/52-only directives.
Page 80 • SX-Key/Blitz Development System Manual 2.0 • Parallax, Inc.