Application With 80C32 (4K Byte Ram Mode) - Profichip VPC3+C User Manual

8 Hardware Interface
8.1.5

Application with 80C32 (4K Byte RAM Mode)

µC
µC
µC
µC
connect to VDD or GND
AB(15..8)
µC
Figure 8-8: 80C32 Application in 4K Byte mode
The internal chipselect is activated when the address inputs AB[10..3] of
the VPC3+C are set to '0'.
In the example above the start address of the VPC3+C is set to 2000H.
Figure 8
76
VPC3+
5
CLK
48 MHz
8
GND XINT
1K
36
RESET
23
VDD
MODE
3K3
24
ALE
2
XWR
XWR
4
XRD
XRD
34
XTEST0
VDD 3K3
35
XTEST1
VDD 3K3
3
DIVIDER
44
AB8
AB0
43
AB9
AB1
41
AB10
AB2
1
AB11
XCS/AB11
40
AB12
AB3
37
AB13
1
AB4
42
AB14
AB5
32
AB15
AB6
31
AB7
1K
29
AB8
1K
25
AB9
1K
10
AB10
GND
1K
Processor
ALE
8
AD[7..0]
3
A B[10..8]
AB[11]
4
AB[15..12]
-9 : Internal Chipselect Generation in Synchronou
Revision 1.03
7
/MOT 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
VPC3+ B
ALE
DB[7..0]
address
latch
AB[2..0]
XCS/A11
AB[6..3]
8
CS
decoder
4 AB[10..7] all bits
zero
Copyright © profichip GmbH 2004-2006
LED for Data_Exchange
µC
GND
1K
RS485
RS485
RS485
ADB0
ADB1
ADB2
ADB3
ADB4
ADB5
ADB6
ADB7
µC
DB(7..0)
8
12
4.0 KB
internal address
RAM
1
internal chip
select
s Intel Mode, 4K Byte RAM
VPC3+C User Manual