Table of Contents
Advertisement
10 Operational Specifications
10.6.5 Timing in the Asynchronous Motorola Mode
In the asynchronous Motorola mode, the VPC3+S acts like a memory with
Ready logic, whereby the access times depend on the type of access.
The request for an access of the VPC3+S is generated from the falling
edge of the AS signal (in addition: XCS = '0', R_W = '1'). The request for a
write access is generated from the rising edge of the AS signal (in addition:
XCS = '0', R_W = '0').
AB10..0
DB7..0
AS
R_W
XCS
XDTACK
(normal)
XDTACK
(early)
Figure 10-17: Asynchronous Motorola Mode, READ (E_CLOCK = 0)
120
valid
43
44
46
47
48
49
Revision 1.04
data valid
45
50
51
Copyright © profichip GmbH, 2012
52
53
54
55
56
57
VPC3+S User Manual
Advertisement
Table of Contents
