Specifications

22 Élan™SC310 Microcontroller Data Sheet
PRELIMINARY
Notes:
1. These signals are active during reset.
2. These pins always default to their DRAM interface function.
3. The drive strength for these pins is programmable. E is the default.
All inputs that have VCC Clamp = 5 V are 5-V safe inputs regardless of their VCCIO.
Table 2. Memory Bus Interface
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
RAS0
1,3
2 O E,D,C Active 3.3/0 3.3/0 VMEM VMEM 50
RAS1
1,3
3 O E,D,C Active 3.3/0 3.3/0 VMEM VMEM 50
CAS1L
[SRCS2]
1,2
4 O D Active 3.3/0 3.3/0 VMEM VMEM 30
CAS1H
[SRCS3]
1,2
5 O D Active 3.3/0 3.3/0 VMEM VMEM 30
CAS0L
[SRCS0]
1,2
6 O D Active 3.3/0 3.3/0 VMEM VMEM 30
CAS0H
[SRCS1]
1,2
7 O D Active 3.3/0 3.3/0 VMEM VMEM 30
MA10/SA13
3
10 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA9/SA23
3
11 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA8/SA22
3
13 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA7/SA21
3
14 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA6/SA20
3
15 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA5/SA19
3
16 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA4/SA18
3
17 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA3/SA17
3
18 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA2/SA16
3
19 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA1/SA15
3
21 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MA0/SA14
3
24 O E,D,C 0 3.3 3.3 VMEM VMEM 70
MWE
3
8 O E,D,C 1 3.3 3.3 VMEM VMEM 70
ROMCS 44 O B 1 5.0 5.0 VSYS
V
CC5
30
DOSCS
43 O B 1 5.0 5.0 VSYS
V
CC5
50