45181 Parallax Inc, 45181 Datasheet - Page 168
45181
Manufacturer Part Number
45181
Description
SX TECH TOOL KIT NO POWER
Manufacturer
Parallax Inc
Series
SXr
Type
Microcontrollerr
Datasheet
1.45180.pdf
(184 pages)
Specifications of 45181
Contents
SX Book, SX Key, SX Tech Board, Samples, Resonators, Cable and Manual
Product
Microcontroller Basic Stamps
Operating Supply Voltage
5 V
For Use With/related Products
SX MCUs
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 168 of 184
- Download datasheet (2Mb)
15 Appendix E: SX Data Sheet
15.3.2 Port B Registers
There are eight registers used to configure the I/O pins of Port B. The TRIS_B register configures the
data direction of the Port B pins as input or output. The LVL_B register configures the input pins as TTL
or CMOS voltage level. The PLP_B register enables/disables pull up resistors on Port B input pins. The
ST_B register enables/disables the Schmitt-Trigger inputs on Port B input pins. The WKEN_B register
enables/disables the multi-input wake up for interrupts on Port B input pins. The WKED_B register
selects rising/falling edge detection on Port B input pins. The WKPND_B register contains the state of
the MIWU pins. The CMP_B registers configures and provides the results from the comparator pins. To
access these registers you must first write a particular value to the MODE register. Please refer to
32 – SX20/28 Mode Register to find the values required in the MODE register to access the Port B
Registers. Note: All the bits in the following registers are set to ‘1’ on power up.
15.3.2.1
A bit set to ‘1’ in this register sets the corresponding I/O port pin to input (high z) mode.
A bit set to ‘0’ in this register sets the corresponding I/O port pin to output mode.
15.3.2.2
A bit set to ‘1’ in this register sets the input level of the corresponding port pin to TTL.
A bit set to ‘0’ in this register sets the input level of the corresponding port pin to CMOS.
15.3.2.3
A bit set to ‘1’ in this register disables the weak pull-up resistor on the corresponding port pin. A bit set
to ‘0’ in this register enables the weak pull-up resistor on the corresponding port pin.
Page 168 SX-Key/Blitz Development System Manual 2.0 Parallax, Inc.
TRIS_B – Data Direction Register
LVL_B - TTL/CMOS Select Register
PLP_B – Pull-Up Resistor Enable Register
RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0
RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0
RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0
7
7
7
6
6
6
5
5
5
TRIS_B
4
4
4
LVL_B
PLP_B
3
3
3
2
2
2
1
1
1
0
0
0
Table
Related parts for 45181
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Terminals 3 Pin Single Row Header (long)
Manufacturer:
Parallax Inc
Part Number:
Description:
Headers & Wire Housings 16 Pin Single Row Header
Manufacturer:
Parallax Inc
Part Number:
Description:
Microcontroller Modules & Accessories DISCONTINUED BY PARALLAX
Manufacturer:
Parallax Inc
Part Number:
Description:
BOOK UNDERSTANDING SIGNALS
Manufacturer:
Parallax Inc
Datasheet:
Part Number:
Description:
COMPETITION RING FOR SUMOBOT
Manufacturer:
Parallax Inc
Datasheet:
Part Number:
Description:
TEXT INFRARED REMOTE FOR BOE-BOT
Manufacturer:
Parallax Inc
Datasheet:
Part Number:
Description:
Microcontroller Modules & Accessories DISCONTINUED BY PARALLAX
Manufacturer:
Parallax Inc
Part Number:
Description:
BOOK UNDERSTANDING SIGNALS
Manufacturer:
Parallax Inc
Datasheet:
Part Number:
Description:
BOARD EXPERIMENT+LCD NX-1000
Manufacturer:
Parallax Inc
Datasheet:
Part Number:
Description:
IC MCU 2K FLASH 50MHZ SO-18
Manufacturer:
Parallax Inc
Datasheet: