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3.2.3
Asynchronous Motorola Mode
In Asynchronous Motorola Mode the data and address busses are separate
(non-multiplexed). When using HC11 types with a multiplexed bus the
address signals AB[7:0] must be generated from the DB[7:0] signals
externally. Address line 11 is to be connected to pin D5 of the VPC3+S.
XDTACK mechanism is supported.
Ball
Pin
Signal Name
BGA
QFP
E3
9
SERMODE
E4
28
MOT/XINT
D4
33
MODE
D5
32
AB11
C2
2
AB10
B3
44
AB9
A1
48
AB8
B1
1
AB7
C3
45
AB6
B2
46
AB5
B4
41
AB4
A5
38
AB3
A6
37
AB2
B5
39
AB1
B6
36
AB0
G4
20
DB7
H5
23
DB6
H6
24
DB5
G5
22
DB4
G6
25
DB3
F4
21
DB2
F6
27
DB1
F5
26
DB0
C1
3
XCS
C5
35
AS
C6
34
R_W
Figure 3-6: Interface Configuration: Asynchronous Motorola Mode
VPC3+S User Manual
Copyright © profichip GmbH, 2012
In/Out
Description
'0': Parallel Interface
I
'1': Motorola Format
I
'0': Asynchronous Interface Mode
I
I
Address Lines Bit 11
I
I
I(S)
I(S)
I
I
Address Lines Bits [10:0]
I
I
I
I
I
IO
IO
IO
IO
Data Bus [7:0]
IO
IO
IO
IO
I
Chip-Select Signal (active low)
I
Address Strobe (active low)
Read-Write Signal ('1' = Read)
I
Revision 1.04
Pin Description 3
Connect to
GND
VCC
GND
CPU Address Bus 11
CPU
Address Bus [10:0]
CPU Data Bus [7:0]
CPU Chip-Select
CPU Address Strobe
CPU Read-Write
15
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