122-32000 Parallax Inc, 122-32000 Datasheet - Page 180

• Manufacturer Part Number: 122-32000
• Description: MANUAL PROPELLER
• Manufacturer: Parallax Inc

Specifications of 122-32000

• Accessory Type: Manual
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: Propeller Education (PE) Kit
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

_CLKMODE
Pre-defined, one-time settable constant for specifying application-level clock mode settings.
CON
Explanation
_CLKMODE
constant symbol whose value is determined by the top object file of an application. The clock
mode setting is a byte whose value is described by a combination of the
XTAL
constants. Note that not every combination is valid; Table 4-4 shows all valid combinations.
1. All constants are also available in Propeller Assembly.
2. All necessary resistors/capacitors are included in Propeller chip.
Page 180 · Propeller Manual v1.0
RCFAST
RCSLOW
XINPUT
XTAL1
XTAL2
XTAL3
PLL1X
PLL2X
PLL4X
PLL8X
PLL16X
Clock Mode
Constant
_CLKMODE =
Setting
•
x and
Expression
Constants shown in table Table 4-3. This will be the clock mode upon application
start-up.
1
is used to specify the desired nature of the System Clock. It is a pre-defined
PLL
Resistance
xx constants at compile time. Table 4-3 illustrates the clock mode setting
Infinite
Infinite
Infinite
500 Ω
2 kΩ
1 kΩ
XO
n/a
n/a
n/a
n/a
n/a
– Spin Language Reference
Expression
is an integer expression made up of one or two Clock Mode Setting
2
6 pF (pad only) External clock-oscillator (DC to 80 MHz); XI pin only, XO disconnected
Table 4-3: Clock Mode Setting Constants
Capacitance
XI/XO
36 pF
26 pF
16 pF
n/a
n/a
n/a
n/a
n/a
n/a
n/a
2
Internal fast oscillator (~12 MHz). May be 8 MHz to 20 MHz. (Default)
Internal slow oscillator (~20 KHz). May be 13 KHz to 33 KHz.
External low-speed crystal (4 MHz to 16 MHz)
External medium-speed crystal (8 MHz to 32 MHz)
External high-speed crystal (20 MHz to 80 MHz)
Multiply external frequency times 1
Multiply external frequency times 2
Multiply external frequency times 4
Multiply external frequency times 8
Multiply external frequency times 16
Description
RC
xxxx,
XINPUT
,