PSD8XXFX
15 MCU bus interface
MCU bus interface
The “no-glue logic” MCU bus interface block can be directly connected to most popular
MCUs and their control signals. Key 8-bit MCUs, with their bus types and control signals, are
shown in Table 17. The interface type is specified using the PSDsoft Express Configuration.
Table 17. MCUs and their control signals
MCU
Data bus
width
CNTL0
CNTL1
CNTL2
PC7
PD0(1) ADIO0 PA3-PA0 PA7-PA3
8031
8
WR
RD PSEN
(2)
ALE
A0
(2)
(2)
80C51XA
t(s) 80C251
80C251
uc 80198
rod 68HC11
P 68HC912
te Z80
le Z8
so 68330
b M37702M2
8
WR
RD PSEN
(2)
ALE
A4
A3-A0
(2)
8
WR PSEN
(2)
(2)
ALE
A0
(2)
(2)
8
WR
RD PSEN
(2)
ALE
A0
(2)
(2)
8
WR
RD
(2)
(2)
ALE
A0
(2)
(2)
8
R/W
E
(2)
(2)
AS
A0
(2)
(2)
8
R/W
E
(2)
DBE
AS
A0
(2)
(2)
8
WR
RD
(2)
(2)
(2)
A0
D3-D0 D7-D4
8
R/W
DS
(2)
(2)
AS
A0
(2)
(2)
8
R/W
DS
(2)
(2)
AS
A0
(2)
(2)
8
R/W
E
(2)
(2)
ALE
A0
D3-D0 D7-D4
- O 1. ALE/AS input is optional for MCUs with a non-multiplexed bus
) 2. Unused CNTL2 pin can be configured as CPLD input. Other unused pins (PC7, PD0, PA3-0) can be configured for other
Obsolete Product(s I/O functions.
Doc ID 7833 Rev 7
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