45300 Parallax Inc, 45300 Datasheet - Page 89
![BOARD PROTO SX48](/photos/9/25/92507/mfg_45300_sml.jpg)
45300
Manufacturer Part Number
45300
Description
BOARD PROTO SX48
Manufacturer
Parallax Inc
Type
MCUr
Specifications of 45300
Contents
Board
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
SX48
For Use With
130-28029 - KIT PARTS SMART SENSORS45111 - MANUAL FOR SX-KEY/BLITZ VER. 2.028850 - CARRIER BOARD BOARD OF EDU USB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
453001
Manufacturer:
LITTELFUSE/力特
Quantity:
20 000
Company:
Part Number:
453002
Manufacturer:
LITTELFU
Quantity:
1 000
- Current page: 89 of 184
- Download datasheet (2Mb)
10.2.2 Pull-Up Resistors
Every I/O pin has optional internal pull-up resisters that can be configured by writing to the
appropriate pull-up register (PLP_A, PLP_B, PLP_C, PLP_D and PLP_E). By configuring pull-up
resisters on input pins, the SX chip can be connected directly to open/drain circuitry without the need
for external pull-up resisters. The internal pull-up resisters are disabled by default. Pull-up resisters can
be activated for all pins, regardless of pin direction but really matter only when the associated pin is set
to input mode.
To configure the I/O pins to have internal pull-up resisters:
The following code snippet demonstrates this:
1) Set the MODE register to $0E (the value for pull-up register configuration).
2) Use the port configuration instruction to set the individual pull-up state of each I/O pin within
3) Set I/O pin directions as necessary.
each port. A high bit (1) disables the pull-up for the corresponding pin and a low bit (0) enables the
pull-up resister for a pin.
; Set output pins low
;
MOV
MOV
MOV
; Pull-Up Resistor Configuration
;
MODE $0E
MOV
MOV
MOV
MODE $0F
MOV
MOV
MOV
ra, #%0000
rb, #%00000000 ; Port B bits 0-7 low
rc, #%00000000 ; Port C bits 0-7 low
!ra,#%0000
!rb,#%11110000 ; Port B bits 4-7 normal, bits 0-3 pull-ups
!rc,#%00001111 ; Port C bits 4-7 pull-ups, bits 0-3 normal
!ra,#%1111
!rb,#%00001111 ; Port B bits 4-7 to output, bits 0-3 input
!rc,#%11110000 ; Port C bits 4-7 to input, bits 0-3 output
; Port A bits 0-3 low
; Set Mode for Pull-Up Resistor configuration
; Port A bits 0-3 to pull-ups
; Set Mode to allow Direction configuration
; Port A bits 0-3 to input
10 SX Special Features and Coding Tips
SX-Key/Blitz Development System Manual 2.0 Parallax, Inc. Page 89
Related parts for 45300
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![30008](/images/manufacturer_photos/0/5/515/parallax_inc_tmb.jpg)
Part Number:
Description:
Microcontroller Modules & Accessories DISCONTINUED BY PARALLAX
Manufacturer:
Parallax Inc
![70009](/photos/26/92/269208/70009-l_tmb.jpg)
Part Number:
Description:
BOOK UNDERSTANDING SIGNALS
Manufacturer:
Parallax Inc
Datasheet:
![27404](/photos/26/91/269197/27404-l_tmb.jpg)
Part Number:
Description:
COMPETITION RING FOR SUMOBOT
Manufacturer:
Parallax Inc
Datasheet:
![70016](/photos/8/99/89966/mfg_70016_tmb.jpg)
Part Number:
Description:
TEXT INFRARED REMOTE FOR BOE-BOT
Manufacturer:
Parallax Inc
Datasheet:
![28135](/images/manufacturer_photos/0/5/515/parallax_inc_tmb.jpg)
Part Number:
Description:
BOARD EXPERIMENT+LCD NX-1000
Manufacturer:
Parallax Inc
Datasheet:
![28023](/photos/9/30/93020/mfg_28023_tmb.jpg)
Part Number:
Description:
CONTROLLER 16SERVO MOTOR CONTROL
Manufacturer:
Parallax Inc
Datasheet:
![30010](/photos/9/30/93025/mfg_30010_tmb.jpg)
Part Number:
Description:
BASIC STAMP LOGIC ANALYZER
Manufacturer:
Parallax Inc
Datasheet:
![SX18AC/SO](/images/manufacturer_photos/0/5/515/parallax_inc_tmb.jpg)
Part Number:
Description:
IC MCU 2K FLASH 50MHZ SO-18
Manufacturer:
Parallax Inc
Datasheet: