122-32000 Parallax Inc, 122-32000 Datasheet - Page 23
122-32000
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
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Each cog has its own RAM, called Cog RAM, which contains 512 registers of 32 bits each.
The Cog RAM is all general purpose RAM except for the last 16 registers, which are special
purpose registers, as described in Table 1-3. The Cog RAM is used for executable code, data,
variables, and the last 16 locations serve as interfaces to the System Counter, I/O pins, and
local cog peripherals.
When a cog is booted up, locations 0 ($000) through 495 ($1EF) are loaded sequentially from
Main RAM / ROM and its special purpose locations, 496 ($1F0) through 511 ($1FF) are
cleared to zero. After loading, the cog begins executing instructions, starting at location 0 of
Cog RAM. It will continue to execute code until it is stopped or rebooted by either itself or
another cog, or a reset occurs.
Note 1: Only accessible as a Source Register (i.e.
Note 2: Reserved for future use.
Cog RAM Map
Table 1-3: Cog RAM Special Purpose Registers
$1F0
$1F1
$1F2
$1F3
$1F4
$1F5
$1F6
$1F7
$1F8
$1F9
$1FA
$1FB
$1FC
$1FD
$1FE
$1FF
Address Name
PAR
CNT
INA
INB
OUTA
OUTB
DIRA
DIRB
CTRA
CTRB
FRQA
FRQB
PHSA
PHSB
VCFG
VSCL
MOV DEST, SOURCE
Read-Only
Read-Only
Read-Only
Read-Only
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Type
1
1
1
1
Propeller Manual v1.0 · Page 23
Boot Parameter
System Counter
Input States for P31 - P0
Input States for P63- P32
Output States for P31 - P0
Output States for P63 – P32
Direction States for P31 - P0
Direction States for P63 - P32
Counter A Control
Counter B Control
Counter A Frequency
Counter B Frequency
Counter A Phase:
Counter B Phase
Video Configuration
Video Scale
).
Description
2
2
2
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