DS80C310_1 Datasheet, PDF (11/21 Pages) Dallas Semiconductor – High-Speed Micro

DS80C310
4. Stop mode current measured with XTAL1 and RST grounded, V_CC=5.5V, all other pins disconnected.
5. When addressing external memory.
6. RST=V_CC. 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, 2, and 3 source transition current when being pulled down externally. It reaches its maximum at
approximately 2V.
9. 0.45<V_IN<V_CC. 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.
TYPICAL I_CC VERSUS FREQUENCY Figure 2
I_CC
mA
30
@ 5V
25
20
15
5
3
2
0 2 4 6 8 10 12 16 20 24
30 33 MHz XTAL
FREQUENCY
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