Application With 80C32 (2K Byte Ram Mode) - Profichip VPC3+C User Manual

8.1.4

Application with 80C32 (2K Byte RAM Mode)

µC
µC
µC
µC
AB(15..8)
µC
Figure 8-6: 80C32 Application in 2K Byte mode
The internal chipselect is a
the VPC3+C are set to '0'.
In the example above the start address of the VPC3+C is set to 1000H.
Figure 8-7: Internal Chipselect Generation in Synchronous Intel Mode, 2K Byte RAM
VPC3+C User Manual
Copyright © profichip GmbH 2004-2006
VPC3+
5
CLK
48 MHz
8
GND XINT/MOT
1K
36
RESET
1
VDD
3K3 XCS
23
VDD
MODE
3K3
24
ALE
2
XWR
XWR
4
XRD
XRD
34
XTEST0
VDD 3K3
35
XTEST1
VDD 3K3
3
connect to
DIVIDER
VDD or GND
44
AB8
AB0
43
AB9
AB1
41
AB10
AB2
40
AB11
AB3
37
AB12
1
AB4
42
AB13
AB5
32
AB14
AB6
31
AB15
AB7
29
AB8
1K
25
1K AB9
10
GND AB10
1K
Processor
ALE
8
AD[7..0]
3
AB[10..8]
5
AB[15..11]
Revision 1.03
Hardware Interface 8
7
CLK2
13
XDATAEX
14
XREADY
9
X/INT
33
XCTS
30
RXD
27
RTS
26
TXD
11
DB0
12
DB1
15
DB2
16
DB3
19
DB4
20
DB5
21
DB6
22
DB7
ctivated when the address inputs AB[10..3] of
VPC3+ B
ALE
DB[7..0]
address
latch
AB[2..0]
AB[7..3]
8
CS
decoder
3
AB[10..8] all bits
zero
LED for Data_Exchange
µC
GND
1K
RS485
RS485
RS485
ADB0
ADB1
ADB2
ADB3
ADB4
ADB5
ADB6
ADB7
µC
DB(7..0)
8
11
4.0 KB
internal address
RAM
1
internal chip
select
75