ELANSC310 datasheet(72/119 Pages) AMD

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Élan™SC310 Microcontroller Data Sheet

PREL IMINARY

THERMAL CHARACTERISTICS

The ÉlanSC310 microcontroller is specified for operation with a case temperature range from 0°C to 85°C for a com-

mercial device. Table 40 shows the thermal resistance for 208-pin QFP and TQFP packages.

Table 40.

Thermal Resistance (°C/Watt)

JT and θJA for 208-pin QFP and TQFP packages

TYPICAL POWER NUMBERS

Table 41 shows the typical power numbers that were

measured for the ÉlanSC310 microcontroller. These

measurements reflect the part when it is configured for

Maximum ISA mode operation at operating speeds of

33 MHz, 25 MHz, and 9.2 MHz. The connection of the

various power sections of the part are outlined in the

table so that the designer may have some relative in-

formation for the power consumption differences be-

tween 3.3-V operation and 5-V operation. Please see

the notes associated with the tables for specifics on the

test conditions.

Notes:

1. In normal operating mode measurements, the ÉlanSC310 microcontroller is running the LandMark Speedcom benchmark

(Version 2.00). All CPU idle cycles are run at the high-speed rate.

2. In Doze mode, the Doze mode configuration is such that the low-speed CPU clock is programmed to turn on for 64 refresh

cycles upon an IRQ0 (DOS timer) generation. After 64 refresh cycles, the low-speed CPU clock is turned off again. The IRQ0

timer is set for an approximate 55 ms interval and the refresh duty cycle is approximately 15.6

µs. In Doze mode, the high-

speed PLL is always turned off and, in this case, the low-speed PLL and video PLLs are on to allow the IRQ0 periodic wake-

up.

3. Suspend mode measurements were taken with DRAM refresh rate set at 8192 Hz (126

µs).

4. Micropower measurements were taken with DRAM unpowered and the DRAM refresh rate set at 8192 Hz.

5. These measurements were taken with the memory interface powered at 5 V, rather than 3.3 V.

All measurements were obtained at typical room temperature (ambient).

Package

JA vs. Airflow-Linear ft/min. (m/s)

0 (0)

200 (1.01)

400 (2.03)

600 (3.04)

800 (4.06)

QFP

4.7

TQFP

37.4

31.0

28.5

26.9

26.6

Table 41.

Typical Maximum ISA Mode Power Consumption

Power Pin

Maximum ISA Mode

Group

Name

Volts

33 MHz

25 MHz

9.2 MHz

Doze2

Suspend3

µ Pwr Off4

CPU Core

VCC

3.3

119 mA

94.3mA

39.1mA

6.12 mA

5.7

µA4.1 µA

I/O VCC

VCC1

5.55 mA

5.55mA

5.55 mA

µA

OFF

Analog

AVCC

3.3

2.58 mA

2.36 mA

2.24 mA

1.39 mA

19.9

µA19.8 µA

I/O

VCC5

772

µA

680

µA

434

µA

293

µA0 µA

OFF

Memory

VCCMEM

3.3

16.4 mA

12.6 mA

4.9 mA

190

µA

10.5

µA

OFF

Sub ISA Bus

VCCSYS

16.8 mA

13.7 mA

7.76 mA

3.6 mA

µA

OFF

Full ISA Bus

VCCSYS2

2.06 mA

1.57 mA

0.9 mA

µA0 µA

OFF

Total (mW)

582 mW

468mW

226mW

72.7 mW

0.12 mW

0.08 mW

Memory5

VCCMEM

26.5 mA

20.3 mA

8.75 mA

304

µA

OFF

Total (mW)

660 mW

528 mW

470 mW

73.6 mW

0.17 mW

0.08 mW

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