Table 1. Product Comparison—ÉlanSC400 and ÉlanSC410 Microcontrollers
Feature
ÉlanSC410
ÉlanSC400
Core CPU
Am486 CPU
Am486 CPU
L1 Cache
8-Kbyte Write-Back
8-Kbyte Write-Back
System management mode (SMM)
Floating-point unit
Yes
No
Yes
No
Data Bus
16, 32 bit
16, 32 bit
ISA Interface
ISA bus mastering
8, 16 bit
No
8, 16 bit
No
VESA Local Bus
VL bus mastering
32 bit
No
32 bit
No
Power Management
Mode timers
Activity detection
SMI/NMI generation
Battery monitoring
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
On-Chip ROM Interface
Width
8, 16, 32 bit
8, 16, 32 bit
Size (total ROM space)
ROM chip selects
3 x 64 Mbyte
3 x 64 Mbyte
3
3
Burst-mode support
Support for SRAM as ROM address space
Yes
Yes
Yes
Yes
On-Chip DRAM Controller
Banks
Width
Size (total of all banks)
EDO support
4
16, 32 bit
64 Mbyte
Yes
4
16, 32 bit
64 Mbyte
Yes
Support for SRAM as main memory
ROM-mappable
ROM-mappable
Integrated PC/AT-Compatible Peripherals
Programmable timer (8254-compatible)
Real-time clock (146818A-compatible)
Port B and Port 92h I/O registers
Cascaded DMA Controllers (8237A)
Width
Yes
Yes
Yes
2
Yes
Yes
Yes
2
8, 16 bit
8, 16 bit
Total number of channels
External channels
Cascaded Interrupt Controllers (8259)
External IRQ signals
7
2
2
8
7
2
2
8
Bidirectional Parallel Port with EPP Mode
Serial Port (UART)
Yes
Yes
16550-compatible
16550-compatible
Keyboard Interface
Support for external 8042 SCP
XT interface
Matrix scanned with SCP emulation
Yes
Yes
Yes
Yes
Yes
Yes
General-Purpose Input/Output Signals
Infrared (IrDA) Port
32
Yes
No
32
Yes
PC Card Controller
Sockets
Yes
2
PCMCIA 2.1-compliant
82365-compatible
Yes
Yes
LCD Graphics Controller
Programmable clock frequency
Unified memory architecture (UMA)
No
Yes
Yes
Yes
JTAG Support
Yes
Yes
Pin Count and Package
292 BGA
292 BGA
VCC: CPU core
On-chip peripheral logic
I/O tolerance (designated pins)
2.7–3.3 V
3.3 V
2.7–3.3 V
3.3 V
5 V
5 V
Processor Clock Rate
33, 66, 100 MHz
33, 66, 100 MHz
Élan™SC400 and ÉlanSC410 Microcontrollers Data Sheet
3
AMD [ AMD ]
