SX28AC/SS Parallax Inc, SX28AC/SS Datasheet - Page 6

• Manufacturer Part Number: SX28AC/SS
• Description: IC MCU 2K FLASH 50MHZ 28SSOP
• Manufacturer: Parallax Inc
• Series: SXr

Specifications of SX28AC/SS

• Core Processor: RISC
• Core Size: 8-Bit
• Speed: 75MHz
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 20
• Program Memory Size: 3KB (2K x 12)
• Program Memory Type: FLASH
• Ram Size: 136 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SSOP
• Product: Microcontroller Basic Stamps
• Flash: 2 KBytes
• Timers: 8 bit
• Operating Supply Voltage: 3 to 5.5 V
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: No RoHS Version Available

Parallax SX20AC/SX28AC
2.0
2.1.
2.2.
Note: I = input, O = output, I/O = Input/Output, P = Power, TTL = TTL input, CMOS = CMOS input, ST = Schmitt Trigger input, MIWU =
Multi-Input Wakeup input.
© Parallax Inc.
RA0
RA1
RA2
RA3
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
RTCC
MCLR
OSC1/In/Vpp
OSC2/Out
V
V
dd
ss
Name
CONNECTION DIAGRAMS
Pin Assignments
Pin Descriptions
Pin Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
I
O
P
P
Input Levels
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
TTL/CMOS/ST
ST
ST
ST
CMOS
-
-
Figure 2-1: Pin Assignments
Table 2-1: Pin Descriptions
Bidirectional I/O Pin; symmetrical source / sink capability
Bidirectional I/O Pin; symmetrical source / sink capability
Bidirectional I/O Pin; symmetrical source / sink capability
Bidirectional I/O Pin; comparator negative input; MIWU/Interrupt input
Bidirectional I/O Pin; comparator positive input; MIWU/Interrupt input
Bidirectional I/O Pin; MIWU/Interrupt input
Bidirectional I/O Pin; MIWU/Interrupt input
Bidirectional I/O Pin; MIWU/Interrupt input
Bidirectional I/O Pin; MIWU/Interrupt input
Bidirectional I/O Pin; MIWU/Interrupt input
Bidirectional I/O Pin
Bidirectional I/O Pin
Bidirectional I/O Pin
Bidirectional I/O Pin
Bidirectional I/O Pin
Bidirectional I/O Pin
Bidirectional I/O Pin
Bidirectional I/O Pin
Master Clear reset input – active low. When not controlled externally, this pin must
be pulled high with a 10 kΩ resistor.
Crystal oscillator output; in R/C mode, internally pulled to V
Ground pin
Bidirectional I/O Pin; symmetrical source / sink capability
Bidirectional I/O Pin; comparator output; MIWU/Interrupt input
Input to Real-time Clock/counter
Crystal oscillator input; external clock source input
Positive supply pin
Page 6 of 51
Description
dd
through weak pull-up
Rev 1.6 11/20/2006
www.parallax.com