DS80C320 datasheet(22/40 Pages) MAXIM

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DS80C320/DS80C323 High-Speed/Low-Power Microcontrollers

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NOTES FOR DS80C320 DC ELECTRICAL CHARACTERISTICS

All parameters apply to both commercial and industrial temperature operation unless otherwise noted. Specifications to -40°C

are guaranteed by design and are not production tested.

1. All voltages are referenced to ground.

2. Active current is measured with a 25MHz clock source driving XTAL1, VCC = RST = 5.5V, all other pins

disconnected.

3. Idle mode current is measured with a 25MHz clock source driving XTAL1, VCC = 5.5V, RST at ground, all

other pins disconnected.

4. Stop mode current measured with XTAL1 and RST grounded, VCC = 5.5V, all other pins disconnected.

5. When addressing external memory. This specification only applies to the first clock cycle following transition.

6. RST = VCC. This condition mimics operation of pins in I/O mode.

7. During a 0-to-1 transition, a one-shot drives the ports hard for two clock cycles. This measurement reflects port

in transition mode.

8. Ports 1 and 3 source transition current when being pulled down externally. It reaches its maximum at

approximately 2V.

9. 0.45<VIN<VCC. Not a high-impedance input. This port is a weak address holding latch because Port 0 is

dedicated as an address bus on the DS80C320. Peak current occurs near the input transition point of the latch,

approximately 2V.

10. Over the industrial temperature range, this specification has a maximum value of 200

mA.

11. This is the current required from an external circuit to hold a logic low level on an I/O pin while the

corresponding port latch bit is set to 1. This is only the current required to hold the low level; transitions from 1

to 0 on an I/O pin will also have to overcome the transition current.

12. Device operating range is 4.5V to 5.5V; however, device is tested to 4.0V to ensure proper operation at

minimum VRST.

TYPICAL ICC vs. FREQUENCY

DS80C320 Datasheet(PDF) 22 Page - Maxim Integrated Products