Specifications

Élan™SC310 Microcontroller Data Sheet 27
PRELIMINARY
Notes:
1. LS in the Clock Off column stands for Last State.
2. Reset State Local Bus signal loading 920 mV–0 V. For 33-MHz operation, CPUCLK loading = 30 pF.
All inputs that have VCC clamp = 5 V are 5-V safe inputs regardless of their VCCIO.
Signal Name Pin No.
I/O
Type
Term
Drive
Type
Clock
Off
Reset State
(volts)
VCCIO
VCC
Clamp
Spec.
Load
(pF)
Local
Bus
Max
ISA
A20 (LA20) 152 O — C 0 3.3 5.0 VSYS2 VCC5 50
A19 (LA19) 153 O — C 0 3.3 5.0 VSYS2 VCC5 50
A18 (LA18) 154 O — C 0 3.3 5.0 VSYS2 VCC5 50
A17 (LA17) 155 O — C 0 3.3 5.0 VSYS2 VCC5 50
A16 (DACK0
) 158 O — C (0/1) 3.3 5.0 VSYS2 VCC5 50
A15 (DACK3
) 159 O — C (0/1) 3.3 5.0 VSYS2 VCC5 50
A14 (DACK7
) 160 O — C (0/1) 3.3 5.0 VSYS2 VCC5 50
A13 (DACK6
) 161 O — C (0/1) 3.3 5.0 VSYS2 VCC5 50
CPUCLK (PULLUP)
2
162 O — E 0 3.3/0 3.3 VCC1 VCC5 50
(30)
CPURST (RSVD) 163 O — C 0 3.3 0.0 VCC1 VCC5 50
PULLUP (IRQ7) 164 I — C — 3.3 3.3 VCC1 VCC5 50
RSVD (PULLUP) 165 (0/I) — C (0/–) 3.3 3.3 VCC1 VCC5 50
PULLUP 183 I — B — 3.3 3.3 VCC1 VCC5 30
CPURDY
(LMEG) 147 O — B 1 0.0 0.0 VSYS2 VCC5 50
PULLDN (IRQ5) 178 I — C — 0.0 3.3 VCC1 VCC5 100
PULLUP (IRQ10) 179 I — C — 0.0 3.3 VCC1 VCC5 100
A12 (BALE) 145 O — E (0/1) 3.3 5.0 VSYS2 VCC5 50
Table 8. Local Bus Interface (Continued)