SX28 Datasheet, PDF (1/52 Pages) List of Unclassifed Manufacturers – Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug

January 19, 2000
SX18AC/SX20AC/SX28AC/SX18AC75/SX20AC75/SX28AC75
Configurable Communications Controllers with EE/Flash Program
Memory, In-System Programming Capability and On-Chip Debug
1.0 PRODUCT OVERVIEW
1.1 Introduction
The Scenix SX family of configurable communications
controllers are fabricated in an advanced CMOS process
technology. The advanced process, combined with a
RISC-based architecture, allows high-speed computa-
tion, flexible I/O control, and efficient data manipulation.
Throughput is enhanced by operating the device at fre-
quencies up to 50/75 MHz and by optimizing the instruc-
tion set to include mostly single-cycle instructions. In
addition, the SX architecture is deterministic and totally
reprogramable. The unique combination of these charac-
teristics enables the device to implement hard real-time
functions as software modules (Virtual Peripheral™) to
replace traditional hardware functions.
On-chip functions include a general-purpose 8-bit timer
with prescaler, an analog comparator, a brown-out detec-
tor, a watchdog timer, a power-save mode with multi-
source wakeup capability, an internal R/C oscillator, user-
selectable clock modes, and high-current outputs.
OSC1 OSC2
RTCC
OSC
D river
4MHz
Internal
RC OSC
Clock
S ele c t
÷ 4 or ÷ 1
System Clock
P ow er-O n
Reset
MCLR
RESET
B row n -O ut
MIW U
Instruction
Pipeline
8
Fetch
Decode
8
PC
3 Level
Stack
E x ec u tiv e
Write Back
8-bit Watchdog
Tim er (W DT)
8-bit Tim er
RTCC
Interrupt Stack
Prescaler for RTCC
or
Prescaler for W DT
Interrupt
MIW U
8
3
Port B
System
C lo ck
8
8
Internal Data Bus
W
FSR
PC
STATU S
O PT IO N
8
8
8
Address
88
ALU
136 Bytes
SRAM
Address 12
In-System
D e bu g g ing
In-System
Programm ing
2k Words
EEPROM
8
Port A
4
A n alo g
Comp
8
8
Port C
8
MODE
8 ^{W rite Data}
8 Read Data
12 Instruction
IR EAD
Figure 1-1. Block Diagram
Scenix™ and the Scenix logo are trademarks of Scenix Semiconductor, Inc.
I²C™ is a trademark of Philips Corporation
Microwire™ is a trademark of National Semiconductor Corporation
All other trademarks mentioned in this document are property of their respec-
tive companies.
© 2000 Scenix Semiconductor, Inc. All rights reserved.
-1-
www.scenix.com