PSD3XX Datasheet, PDF (14/85 Pages) STMicroelectronics – Low Cost Field Programmable Microcontroller Peripherals

8.0
Operating Modes
(MCU
Configurations)
(cont.)
Figure 3A. Connecting a PSD3XX to an 8-Bit Multiplexed-Bus MCU
Your
8-bit
MCU
AD0 -AD7
A8 -A15
ALE/AS
PSEN
R/ W or WR
RD/E / DS¹
A19 / CSI
RESET
A16-A18²
PA
PSD3XX PB
PC
PSD3XX Family
Figure 3B. Connecting a PSD3XX to a 16-Bit Multiplexed-Bus MCU
Your
16-bit
MCU
AD0 -AD7
AD8 -AD15
ALE/AS
BHE/ PSEN
R/ W or WR
RD/E / DS¹
A19 / CSI
RESET
A16-A18²
PA
PSD3XX PB
PC
Figure 3C. Connecting a PSD3XX to an 8-Bit Non-Multiplexed-Bus MCU
Your
8-bit
MCU
D0 -D7
A0-A15
ALE/AS
PSEN
R/ W or WR
RD/E / DS¹
A19 / CSI
RESET
A16-A18²
PA
PSD3XX PB
PC
Figure 3D. Connecting a PSD3XX to a 16-Bit Non-Multiplexed-Bus MCU
Your
16-bit
MCU
D0 -D15
A0-A15
ALE/AS
BHE / PSEN
R/ W or WR
RD/E / DS¹
A19 / CSI
RESET
A16-A18²
PA
PSD3XX PB
D0 -D7
D8-D15
PC
NOTES: 1. DS is a valid input on 3X2/3X3 and devices only.
2. Connect A16-A18 to Port C if your MCU outputs more than 16 bits of address.
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