45300 Parallax Inc, 45300 Datasheet - Page 13
![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: 13 of 184
- Download datasheet (2Mb)
1 Introduction to the SX-Key/Blitz Hardware
The SX-Key/Blitz hardware consists of the programmer unit, a four-pin programming interface and a
standard, female serial port connector (DB9). The serial port connector should be plugged into an
available standard, straight-through serial cable on an IBM-compatible PC. The four-pin connector on
the SX-Key/Blitz board should be connected to four pins (VSS, VDD, OSC2 and OSC1) of the SX chip.
Take care to connect it in the right orientation because this connector is not indexed.
The SX-Key/Blitz is powered by the target circuit’s power supply and programming and debugging
takes place over the oscillator pins. The power supply to the SX-Key/Blitz must be +5 V DC. If an
external crystal, resonator or RC circuit is used, the SX-Key/Blitz can usually remain connected to the
SX chip for programming purposes, without affecting the operation of the circuit. When debugging, the
SX chip must not have an external clock source since the SX-Key’s internal programmable oscillator
must be used. The SX-Blitz can only program SX chips, it cannot debug them.
Each SX microcontroller contains the necessary debugger hooks required to perform SX in-circuit
debugging. No other supporting chips are necessary for the debugging process. During debugging, the
SX-Key provides the oscillator signal to drive the SX microcontroller until such time that a breakpoint is
hit or a single step or stop mode is initiated.
Figure 1 - Connecting the SX-Key/Blitz shows all the connections necessary to program, debug and run
the SX microcontroller. An external resonator or crystal should be connected to the OSC1 and OSC2
pins to run the SX if the SX-Blitz is used, or if the SX-Key’s internal clock oscillator is not used.
Vss
+5
RTCC
VDD
VSS
RA0
RA1
RA2
RA3
RB0
RB1
RB2
RB3
RB4
n.c.
n.c.
10
11
12
13
14
1
2
3
4
5
6
7
8
9
28
27
26
25
24
23
22
21
20
19
18
17
16
15
MCLR
OSC1
OSC2
RC7
RC6
RC5
RC4
RC3
RC2
RC1
RC0
RB7
RB6
RB5
Figure 1 - Connecting the SX-Key/Blitz
1 Introduction the SX-Key/Blitz Hardware
+5
SX-Key/Blitz Development System Manual 2.0 Parallax, Inc. Page 13
DB9 serial port
connector
SX-Key or SX-Blitz
programmer device
4-pin programming
interface
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